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This chapter describes the commands used to configure voice ports. Table 9-1 lists the voice port configuration commands and maps which commands are supported on which voice call signaling types.
| Voice Port Command | Type of Voice Port Supported On |
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|---|---|---|---|---|
Analog and Digital |
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Analog and Digital |
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Analog and Digital |
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Analog and Digital |
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Analog and Digital |
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Analog and Digital |
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Analog and Digital |
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Digital only |
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Analog and Digital |
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Analog only |
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Analog and Digital |
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Analog and Digital |
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Analog and Digital |
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Analog and Digital |
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Analog and Digital |
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Analog only |
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Analog and Digital |
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Analog only |
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Analog and Digital |
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Analog and Digital |
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Analog only |
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Analog and Digital |
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Analog and Digital |
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Analog only |
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Analog only |
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Analog and Digital |
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Analog and Digital |
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Analog only |
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Analog and Digital |
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Analog and Digital |
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Analog and Digital |
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Analog and Digital |
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Analog and Digital |
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Analog and Digital |
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Analog and Digital |
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Analog and Digital |
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Analog and Digital |
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Analog and Digital |
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Analog and Digital |
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Analog and Digital |
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Analog and Digital |
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Analog and Digital |
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Analog and Digital |
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Analog and Digital |
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Analog and Digital |
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Analog and Digital |
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Analog only |
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Analog and Digital |
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Analog and Digital |
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Analog and Digital |
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This command has no arguments or keywords.
Enabled
Voice-port configuration
| Release | Modification |
|---|---|
11.3 MA | This command was first introduced. |
The auto-cut-through command applies to E&M voice ports only on the Cisco MC3810.
The following example enables the Cisco MC3810 to complete a call when a PBX does not provide an M-lead response:
voice-port 1/1 auto-cut-through
To force a voice port into busyout state, use the busyout forced voice-port configuration command. To remove a voice port from busyout state, use the no form of this command.
busyout forcedThis command has no arguments or keywords.
The voice-port is not in busyout state.
Voice-port configuration
| Release | Modification |
|---|---|
12.0(3) T | This command was first introduced. |
If you have forced a voice port into busyout state, you must enter the no busyout forced command if you wish remove the busyout state from the voice port.
The following example configures the voice port on the Cisco MC3810 into forced busyout state:
voice-port 1/1 busyout forced
| Command | Description |
Places a voice port into busyout monitor state. | |
Specifies the busyout seize procedure for a voice port. | |
show voice busyout | Displays information about the voice busyout state. |
Places all voice ports associated with a serial or ATM interface into a busyout state. |
To place a voice port into busyout monitor state, use the busyout-monitor voice-port configuration command. To remove the busyout monitor state on the voice-port, use the no form of this command.
busyout-monitor interface
interface | The interface associated with the voice port that will be monitored for events that would trigger a voice-port busyout. Choices are the following:
|
The voice port is not in busyout monitor state.
Voice-port configuration
| Release | Modification |
|---|---|
12.0(3) T | This command was first introduced. |
This command is only supported on the Cisco MC3810.
When you place the voice port in busyout monitor state, the voice port monitors the serial interface for events that would trigger the voice port to enter busyout state.
The following example configures the voice port to monitor serial port 0:0 for events that would trigger a busyout state on the voice port:
voice-port 1/1 busyout-monitor serial 0:0
| Command | Description |
busyout forced | Forces a voice port into busyout state. |
busyout-seize | Specifies the busyout seize procedure for a voice port. |
show voice busyout | Displays information about the voice busyout state. |
voice-port busyout | Places all voice ports associated with a serial or ATM interface into a busyout state. |
To specify the busyout seize procedure for a voice port, use the busyout-seize voice-port configuration command. To restore the default busyout seize state on the voice-port, use the no form of this command.
busyout-seize {ignore | repeat}
ignore | On busyout, leaves the loop open and ignores the incoming signal. |
repeat | On busyout, seizes the far end and ignores all incoming signals until the far end release. Remove the seize signal, wait for one second before starting to seize the far end again. |
On busyout, the loop is closed and remains in the busyout state.
Voice-port configuration
| Release | Modification |
|---|---|
12.0(3) T | This command was first introduced. |
This command is only supported on the Cisco MC3810.
The following example configures the busyout seize to the ignore state:
voice-port 1/1 busyout-seize ignore
| Command | Description |
busyout forced | Forces a voice port into busyout state. |
busyout-monitor | Specifies the busyout seize procedure for a voice port. |
show voice busyout | Displays information about the voice busyout state. |
voice-port busyout | Places all voice ports associated with a serial or ATM interface into a busyout state. |
g729r8 | G729, 8k CSA-CELP compression. This is the default. |
g729ar8 | G729, 8k CSA-CELP Annex A compression. |
g726r32 | G.726 32K ADCPM compression. |
g711alaw | G.711 64K PCM A-Law compression. |
g711ulaw | G.711 64K PCM U-Law compression. |
g729ar8 compression mode is enabled.
Voice-port configuration
| Release | Modification |
|---|---|
11.3 MA | This command was first introduced. |
12.0 | The g726r32, g711alaw, and g711ulaw options were added. |
The g729ar8 compression mode can support a maximum of 24 simultaneously active on-net voice calls and has a nominal data rate of 8 kbps.
The g729r8 compression mode can support a maximum of 12 simultaneously active on-net voice calls and has a nominal data rate of 8 kbps.
The g726r32 compression mode has a nominal data rate of 32 kbps.
The g711alaw compression mode has a nominal data rate of 64 kbps.
The g711ulaw compression mode has a nominal data rate of 64 kbps.
This command applies to both analog and digital voice ports on the Cisco MC3810.
The following example configures voice port 1/1 on the Cisco MC3810 to support g729r8 compression:
voice-port 1/1 codec g729r8
| Command | Description |
Specifies the companding standard used to convert between analog and digital signals in PCM systems. |
This command has no arguments or keywords.
Enabled
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) T | This command was first introduced. |
Use the comfort-noise command to generate background noise to fill silent gaps during calls if VAD is activated. If comfort-noise is not enabled, and VAD is enabled at the remote end of the connection, the user will hear dead silence when the remote party is not speaking.
The configuration of comfort-noise only affects the silence generated at the local interface; it does not affect the use of VAD on either end of the connection or the silence generated at the remote end of the connection.
The following example enables background noise on the Cisco MC3810:
voice-port 1/1 comfort-noise
| Command | Description |
Enables voice activity detection (VAD) on a voice port. |
u-law | Specifies the North American mu-law ITU-T PCM encoding standard. |
a-law | Specifies the European a-law ITU-T PCM encoding standard. |
u-law (T1 digital)
a-law (E1 digital)
Voice-port configuration
| Release | Modification |
|---|---|
11.3 MA | This command was first introduced. |
This command applies only to the Cisco MC3810.
The following example configures a-law encoding on voice port 1/1 on the Cisco MC3810:
voice-port 1/1 compand-type a-law
| Command | Description |
Configures voice compression on a Cisco MC3810 voice port. |
tx-a-bit | Command affects the transmit A bit. |
tx-b-bit | Command affects the transmit B bit. |
tx-c-bit | Command affects the transmit C bit. |
tx-d-bit | Command affects the transmit D bit. |
rx-a-bit | Command affects the receive A bit. |
rx-b-bit | Command affects the receive B bit. |
rx-c-bit | Command affects the receive C bit. |
rx-d-bit | Command affects the receive D bit. |
on | Forces the bit state to be 1. |
off | Forces the bit state to be 0. |
invert | Inverts the bit state. |
No bit state conditions are manipulated.
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) MA3 | This command was first introduced. |
This command applies to the Cisco MC3810 only.
Use the condition command to manipulate the bit patterns sent or received by the Cisco MC3810 to match expected patterns on a connected device. Be careful not to destroy the information content of the bit pattern. For example, forcing the A-bit on or off will prevent FXO interfaces from being able to generate both an on-hook and off-hook state.
If conditioning is required, it typically is applied to both transmit and receive bits; however, conditioning can be applied to only transmit or receive bits, as required.
The following example inverts the signaling format bit-pattern on voice port 1/1 on the Cisco MC3810:
voice-port 1/1 condition tx-a-bit invert condition rx-a-bit invert
| Command | Description |
Defines the transmit and receive bits for E&M and E&M Melcas voice signaling. | |
Configures an E&M or E&M Melcas voice port on the Cisco MC3810 to ignore specific receive bits. |
To specify a connection mode for a voice port, use the connection voice-port configuration command. Use the no form of this command to disable a connection mode.
connection {plar | tie-line | plar-opx} string
plar | Specifies a private line auto ring down (PLAR) connection. PLAR is handled by associating a dial peer directly with an interface; when an interface goes off-hook, the dial peer is used to set up the second call leg and conference them together without the caller having to dial any digits. |
tie-line | Specifies a tie-line connection to a private branch exchange (PBX). |
plar-opx | Specifies a PLAR Off-Premises eXtension connection. The local voice port provides a local response before the remote voice port receives an answer. On FXO interfaces, the voice port will not answer until the remote side answers. This keyword was named plar-opx-ringrelay in earlier Cisco IOS releases. |
string | Specifies the destination telephone number. Valid entries are any series of digits that specify the E.164 telephone number. |
No connection mode is specified.
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) T | This command was first introduced. |
11.3(1) MA5 and 12.0(2) T | The plar-opx keyword was added. |
Use the connection command to specify a connection mode for a specific interface. For example, use the connection plar command to specify a PLAR interface. The string you configure for this command is used as the called number for all calls coming in over this connection. The destination dial peer is determined by called number.
If the connection command is not configured, the standard session application outputs a dial tone when the interface goes off-hook until enough digits are collected to match a dial peer and complete the call.
The connection tie-line command is used on the Cisco MC3810 when a dial plan requires that additional digits be added in front of any digits dialed by the PBX, and that the combined set of digits be used to route the call via the dial peers and into the network. The operation is similar to the connection plar command operation, but in this case the tie-line port also waits to collect digits from the PBX. The tie-line digits are also automatically stripped by a terminating port.
The following example selects tie-line as the connection mode on the Cisco MC3810, with a destination telephone number of 555-9262:
voice-port 1/1 connection tie-line 5559262
| Command | Description |
session-target | Configures a network-specific address for a dial peer. |
dial-peer voice | Enters dial-peer configuration mode and specifies the method of voice-related encapsulation. |
destination-pattern | Specifies either the prefix or the full E.164 telephone number to be used for a dial peer. |
To configure a voice call progress tone locale, use the cptone voice-port configuration command. Use the no form of this command to restore the default value.
cptone locale
locale | Specifies the voice interface-related default tone, ring, and cadence setting for the specified country or territory. The default is northamerica. The valid entries are the following: argentina, australia, austria, belgium, brazil, china, columbia, czechrepublic, denmark, finland, france, germany, greece, hongkong, hungary, iceland, india, indonesia, ireland, israel, italy, japan, korea, luxembourg, malaysia, netherlands, newzealand, northamerica, norway, peru, philippines, poland, portugal, russia, singapore, slovakia, southafrica, spain, sweden, switzerland, taiwan, thailand, turkey, unitedkingdom, venezuela. |
northamerica.
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) T | This command was first introduced. |
Use the cptone command to specify a regional analog voice interface-related tone, ring, and ring cadence setting for a specified voice port.
The following example configures Singapore as the call progress tone locale on the Cisco MC3810:
voice-port 1/1 cptone singapore
| Command | Description |
Specify the ring cadence for an FXS voice port on the Cisco MC3810. |
Tx-bits | Transmit signaling bits. |
Rx-bits | Receive signaling bits. |
seize | The bit pattern defines the seized state. |
idle | The bit pattern defines the idle state. |
0000 through 1111 | Specifies the bit pattern. |
The default is to use the preset signaling patterns as defined in ANSI and CEPT standards, as follows:
For E&M:
Tx-bits idle 0000 (0001 if on E1 trunk)
Tx-bits seize 1111
Rx-bits idle 0000
Rx-bits seize 1111
For E&M Melcas:
Tx-bits idle 1101
Tx-bits seize 0101
Rx-bits idle 1101
Rx-bits seize 0101
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) MA3 | This command was first introduced. |
This command applies to digital voice ports associated with T1/E1 controllers on the Cisco MC3810 only.
Use the define command to match the E&M bit patterns with the attached telephony device. Be careful not to define invalid configurations, such as all 0000 on E1, or identical seized and idle states. Use this command with the ignore command.
To configure a voice-port sending traffic in North American E&M signaling format to convert the signaling to Mercury Exchange Limited (MEL) CAS format, enter the following commands:
voice-port 1/1 define rx-bits idle 1101 define rx-bits idle 0101 define tx-bits seize 1101 define tx-bits seize 0101
| Command | Description |
Manipulate the signaling bit-pattern for all voice signaling types. | |
Configures an E&M or E&M Melcas voice port on the Cisco MC3810 to ignore specific receive bits. |
string | Character string from 1 to 255 characters. |
Enabled with a null string
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) T | This command was first introduced. |
Use the description command to include descriptive text about this voice-port connection. This information is displayed when you issue a show command and does not affect the operation of the interface in any way.
The following example identifies voice port 1/1 on the Cisco MC3810 as being connected to the Marketing department:
voice-port 1/1 description marketing_dept
dtmf | DTMF (touch-tone) dialing. |
pulse | Pulse (rotary) dialing. |
dtmf
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) T | This command was first introduced. |
11.3(1) MA3 | The pulse-dialer option was added. |
Use the dial-type command to specify an out-dialing type for an FXO or E&M voice port interface; this command is not applicable to FXS voice ports because they do not generate out-dialing. Voice ports can always detect dtmf and pulse signals. This command does not affect voice port dialing detection.
The dial-type command affects out-dialing as configured for the dial peer.
The following example configures a voice port on the Cisco MC3810 to support a rotary (pulse tone) dialer:
voice-port 1/1 dial-type pulse
milliseconds | Number of milliseconds the echo-canceller will cover on a given signal. Valid values are 16, 24, and 32. |
16 milliseconds
Voice-port configuration
| Release | Modification |
|---|---|
11.3 (1)T | This command was first introduced. |
Use the echo-cancel coverage command to adjust the coverage size of the echo canceller. This command enables cancellation of voice that is sent out the interface and received back on the same interface within the configured amount of time. If the local loop (the distance from the analog interface to the connected equipment producing the echo) is longer, the configured value of this command should be extended.
If you configure a longer value for this command, it will take the echo canceller longer to converge; in this case, the user might hear slight echo when the connection is initially set up. If the configured value for this command is too short, the user might hear some echo for the duration of the call because the echo canceller is not cancelling the longer delay echoes.
There is no echo or echo cancellation on the network (for example, non-POTS) side of the connection.
The following example adjusts the size of the echo canceller to 16 milliseconds on the Cisco MC3810:
voice-port 1/1 echo-cancel enable echo-cancel coverage 16
| Command | Description |
Enables echo cancellation on a voice port. |
This command has no arguments or keywords.
Enabled for all interface types.
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) T | This command was first introduced. |
The echo-cancel enable command enables cancellation of voice that is sent out the interface and is received back on the same interface; sound that is received back in this manner is perceived by the listener as an echo. Disabling echo cancellation might cause the remote side of a connection to hear an echo. Because echo cancellation is an invasive process that can minimally degrade voice quality, this command should be disabled if it is not needed.
The echo-cancel enable command does not affect the echo heard by the user on the analog side of the connection.
There is no echo path for a 4-wire E&M interface. The echo canceller should be disabled for that interface type.
The following example enables the echo cancellation feature and adjusts the size of the echo canceller to 16 milliseconds on the Cisco MC3810:
voice-port 1/1 echo-cancel enable echo-cancel coverage 16
| Command | Description |
Sets the echo-cancel coverage duration in milliseconds. | |
Enables non-linear processing in the echo canceller. |
To change the idle state voltage presented to the line by an FXS voice port on a Cisco MC3810, use the idle voltage voice-port configuration command. Use the no form of this command to restore the default value.
idle voltage {low | high}
low | Sets the idle voltage to 24-volt battery feed. |
high | Sets the idle voltage to 48-volt battery feed. |
Idle voltage is low (24-volt battery feed).
Voice-port configuration
| Release | Modification |
|---|---|
12.0(3) XG and 12.0(4) T | This command was first introduced. |
This command applies only to analog FXS voice ports on the Cisco MC3810. If the idle voltage is set to high, the battery feed voltage reverts to 24V whenever any device connected to the port is active (off hook).
Set the idle voltage to high when connecting to devices that monitor the line voltage to determine if a parallel load has already answered calls.
To set the idle voltage to high on voice port 1/1, enter the following commands:
voice-port 1/1 idle voltage high
rx-a-bit | Ignores the receive A bit. |
rx-b-bit | Ignores the receive B bit. |
rx-c-bit | Ignores the receive C bit. |
rx-d-bit | Ignores the receive D bit. |
The default is mode-dependent:
E&M:
no ignore rx-a-bit
ignore rx-b-bit, rx-c-bit, rx-d-bit
E&M Melcas:
no ignore rx-b-bit, rx-c-bit, rx-d-bit
Voice-port configuration
| Release | Modification |
|---|---|
11.3 MA | This command was first introduced. |
This command applies only to digital voice ports on the Cisco MC3810.
Use this command with the define command.
To configure voice-port 1/1 to ignore receive bits b, c, and d, enter the following commands:
voice-port 1/1 ignore rx-b-bit ignore rx-c-bit ignore rx-d-bit
| Command | Description |
Manipulates the signaling bit-pattern for all voice signaling types. | |
Defines the transmit and receive bits for E&M and E&M Melcas voice signaling. |
To specify the terminating impedance of an FXS voice port interface, use the impedance voice-port configuration command. Use the no form of this command to restore the default value. This command applies to analog voice ports only.
impedance {600c | 600r | 900c | 900r | complex1 | complex2}
600c | 600 ohms complex (600 ohms in series with 2.15 µf). |
600r | 600 ohms resistive (real). |
900c | 900 ohms complex (900 ohms in series with 2.15 µf). |
900r | 900 ohms resistive (real). |
complex1 | 220 ohms in series with the parallel combination of 820 ohms and 115 nf. |
complex2 | 270 ohms in series with the parallel combination of 750 ohms and 150 nf. |
Impedance is 600 ohms resistive.
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) T | This command was first introduced. |
Use the impedance command to specify the terminating impedance of an FXS voice-port interface. The impedance value selected needs to match the specifications from the specific telephony system to which it is connected.
If the impedance is set incorrectly, gain settings might not work correctly, and there will be a significant amount of echo generated (which could be masked if the echo-cancel command has been enabled).
A voice port must be shut down and reopened for a new impedance value to take effect.
This command has no effect if it is entered for an FXO or E&M voice port (the impedance of FXO and E&M voice ports is not configurable). However, if the command is inadvertently entered for a nonconfigurable voice port, the show voice port command will return a false impedance value.
The following example configures an FXS voice port on the Cisco MC3810 for a terminating impedance of 900 ohms (complex):
voice-port 1/1 impedance 900c
dB gain | Receive dB gain to be inserted at the receiver side of the interface. Acceptable value is any integer from -6 to 14. |
No gain is inserted.
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) T | This command was first introduced. |
A system-wide loss plan must be implemented using both input gain and output attenuation commands. Other equipment (including PBXs) in the system must be taken into account when creating a loss plan. This default value for this command assumes that a standard transmission loss plan is in effect, meaning that normally, there must be -6dB attenuation between phones. Connections are implemented to provide -6dB of attenuation when the input gain and output attenuation commands are configured with the default value of 0.
You can't increase the gain of a signal going out into the PSTN, but you can decrease it. Therefore, if the voice level is too high, you can decrease the volume by either decreasing the input gain value or by increasing the output attenuation.
You can increase the gain of a signal coming in to the router. If the voice level is too low, you can increase the input gain.
The following example configures a 3-dB gain to be inserted at the receiver side of the interface in the Cisco MC3810:
port 1/1 input gain 3
| Command | Description |
Configures a transmit attenuation value for a voice port. |
This command has no arguments or keywords.
Non-linear processing is enabled for all voice-port types.
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) T | This command was first introduced. |
The function enabled by the non-linear command is also generally known as residual echo suppression. This command is associated with the echo canceller operation. The echo-cancel enable command must be enabled for the non-linear command to take effect. Use the non-linear command to shut off any signal if no near-end speech is detected.
Enabling the non-linear command normally improves performance, although some users might perceive truncation of consonants at the end of sentences when this command is enabled.
The following example enables non-linear call processing on the Cisco MC3810:
voice-port 1/1 non-linear
| Command | Description |
Enables the cancellation of voice that is sent out the interface and is received back on the same interface. |
2-wire | 2-wire E&M cabling scheme. |
4-wire | 4-wire E&M cabling scheme. |
E&M ports are set for 2-wire operation.
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) T | This command was first introduced. |
The operation command only affects voice traffic. Signaling is independent of 2-wire versus 4-wire settings. If the wrong cable scheme is specified, the user might get voice traffic in only one direction.
Configuring the operation command on a voice port changes the operation of both voice ports on a voice interface card (VIC) in a Cisco 2600 or 3600 series router. In the Cisco MC3810 this command applies only to the analog voice module (AVM), and it affects the operation of the E&M voice port on each analog personality module (APM) individually.
This command is not applicable to FXS or FXO interfaces, because they are always 2-wire interfaces.
The voice port must be shut down and then opened again for the new value to take effect.
The following example specifies a 2-wire cabling scheme for an E&M port on the Cisco MC3810:
voice-port 1/1 operation 2-wire
| Command | Description |
Specifies the type of signaling for a voice port. | |
Specifies the E&M interface type. |
dB attenuation | Attenuation in dB at the transmit side of the interface. Acceptable value is any integer from 0 to 14. |
No transmit attenuation is inserted.
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) T | This command was first introduced. |
A system-wide loss plan must be implemented using both input gain and output attenuation commands. Other equipment (including PBXs) in the system must be taken into account when creating a loss plan. This default value for this command assumes that a standard transmission loss plan is in effect, meaning that there is 6 dB of attenuation between phones. Connections are implemented to provide 6 dB of attenuation when the input gain and output attenuation commands are configured with the default value of 0.
You cannot increase the gain of a signal transmitted to the PSTN, but you can decrease it. Therefore, if a voice level is too high, you can decrease the volume by either decreasing the receive gain or by increasing the transmit attenuation.
The following example on the Cisco MC3810 inserts 6 dB of attenuation on at the transmit side of the voice port:
voice-port 1/1 output attenuation 6
| Command | Description |
Configures a receive gain value for a voice port. |
maximum | Maximum playout delay. The maximum delay is the time the Cisco MC3810 DSP starts to discard voice packets. |
nominal | Nominal playout delay. The nominal delay is the wait time that the Cisco MC3810 DSP starts to play out the voice packets. |
milliseconds | Playout-delay in milliseconds. The range for maximum playout delay is 40 to 320, and the range for nominal playout delay is 40 to 240. |
The maximum playout delay is 160 milliseconds.
The nominal playout delay is 80 milliseconds.
Voice-port configuration
| Release | Modification |
|---|---|
11.3 MA | This command was first introduced. |
This command applies only to the Cisco MC3810.
The following example configures a nominal playout delay of 80 milliseconds and a maximum playout delay of 160 milliseconds on voice-port 1/1 on the Cisco MC3810:
voice-port 1/1 playout-delay nominal 80 playout-delay maximum 160
on1 | Pulses on for 100 milliseconds. |
off1 | Pulses off for 100 milliseconds. |
on2 | Pulses on for 200 milliseconds. |
off2 | Pulses off for 200 milliseconds. |
on3 | Pulses on for 300 milliseconds. |
off3 | Pulses off for 300 milliseconds. |
on4 | Pulses on for 400 milliseconds. |
off4 | Pulses off for 400 milliseconds. |
on5 | Pulses on for 500 milliseconds. |
off5 | Pulses off for 500 milliseconds. |
on6 | Pulses on for 600 milliseconds. |
off6 | Pulses off for 600 milliseconds. |
on2 off4 (default North American ring pattern)
Voice-port configuration
| Release | Modification |
|---|---|
11.3 MA | This command was first introduced. |
This command applies only to the Cisco MC3810.
The following example configures the ring cadence for 0.4 second on and 0.2 second off on voice port 1/1 on the Cisco MC3810, enter the following:
voice-port 1/1
ring cadence on4 off2
| Command | Description |
Specifies the ring frequency for an FXS voice port. | |
Specifies the number of rings for an FXO voice port. |
frequency | Ring frequency (Hertz) used in the FXS interface. Valid entries on the Cisco MC3810 are 20 and 30. |
20 Hz
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) T | This command was first introduced. |
Use the ring frequency command to select a specific ring frequency for an FXS voice port. Use the no form of this command to reset the default value for this command. The ring frequency you select must match the connected equipment. If set incorrectly, the attached phone might not ring or might buzz. In addition, the ring frequency is usually country-dependent and you should take into account the appropriate ring frequency for your area before configuring this command.
This command does not affect ringback, which is the ringing a user hears when placing a remote call.
The following example configures the ring frequency on the Cisco MC3810 for 20 Hz:
voice-port 1/1 ring frequency 20
| Command | Description |
Specifies the ring cadence for an FXS voice port. | |
Specifies the number of rings for an FXO voice port. |
number | Number of rings detected before answering the call. Valid entries are numbers from 1 to 10. The default is 1. |
One ring
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) T | This command was first introduced. |
Use the ring number command to set the maximum number of rings to be detected before answering a call over an FXO voice port. Use the no form of this command to reset the default value, which is one ring.
Normally, this command should be set to the default so that incoming calls are answered quickly. If you have other equipment available on the line to answer incoming calls, you might want to set the value higher to give the equipment sufficient time to respond. In that case, the FXO interface would answer if the equipment on line did not answer the incoming call in the configured number of rings.
This command is not applicable to FXS or E&M interfaces because they do not receive ringing to receive a call.
The following example on the Cisco MC3810 sets five rings as the maximum number of rings to be detected before closing a connection over this voice port:
voice-port 1/1 ring number 5
| Command | Description |
Specifies the ring frequency for an FXS voice port. |
This command has no arguments or keywords.
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) T | This command was first introduced. |
When you enter the shutdown command, all ports on the voice interface card are disabled. When you enter the no shutdown command, all ports on the voice interface card are enabled. A telephone connected to an interface will hear dead silence when a port is shut down.
The following example takes voice port 1/1 on the Cisco MC3810 series offline:
configure terminal voice-port 1/1 shutdown
For FXO and FXS:
signal {loop-start | ground-start}For E&M:
signal {wink-start | immediate | delay-dial}
loop-start | Loop start signaling for FXO and FXS interfaces. This is the default setting for FXO and FXS voice ports. |
ground-start | Ground start signaling for FXO and FXS interfaces. |
wink-start | Wink start signaling for E&M interfaces. This is the default setting for E&M voice ports. |
immediate | Immediate start signaling for E&M interfaces. |
delay-dial | Delay dial signaling for E&M interfaces. |
Loop-start for FXO and FXS interfaces; wink-start for E&M interfaces
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) T | This command was first introduced. |
Configuring this command for an E&M voice port changes only the signal value for the selected voice port. In either case, the voice port must be shut down and then activated before the configured values will take effect.
Some PBXs will miss initial digits if the E&M voice port is configured for Immediate signaling. If this occurs, use Delay-Dial signaling instead. Some non-Cisco devices have a limited number of DTMF receivers. This type of equipment must delay the calling side until a DTMF receiver is available.
The following example configures ground start signaling on voice port 1/1:
configure terminal voice-port 1/1 signal ground-start
| Command | Description |
Specifies the delay signal duration for a voice port. | |
Specifies the minimum delay time from outgoing seizure to outdial address for a voice port. | |
Specifies the maximum wink signal duration for a voice port. | |
Specifies the maximum wink-wait duration for a voice port. |
This command has no arguments or keywords.
The default for this command is enabled.
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) T | This command was first introduced. |
Use the snmp trap link-status command to enable SNMP trap messages (linkup and linkdown) to be generated whenever this voice port is brought online or offline.
If you are managing the equipment with an SNMP manager, this command should be enabled. Enabling link-status messages allows the SNMP manager to learn of a status change without polling the equipment. If you are not using an SNMP manager, this command should be disabled to avoid unnecessary network traffic.
The following example enables SNMP trap messages for voice port 1/1 on the Cisco MC3810:
voice-port 1/1 snmp trap link-stat
This command has no arguments or keywords.
Enabled
Voice-port configuration
| Release | Modification |
|---|---|
11.3 MA | This command was first introduced. |
This command indicates whether or not supervisory disconnect signaling is available on the FXO port. Supervisory disconnect signaling is a power denial from the switch lasting at least 350 milliseconds. When this condition is detected, the system interprets this as a disconnect indication from the switch and clears the call.
You should configure no supervisory disconnect on the voice port if there is no supervisory disconnect available from the switch.
The following example configures supervisory disconnect on a Cisco MC3810 voice-port:
voice-port 1/1 supervisory disconnect
seconds | Initial timeout duration in seconds. Valid entries are any integer from 0 to 120. |
10 seconds
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) T | This command was first introduced. |
Use the timeouts initial command to specify the number of seconds the system will wait for the caller to input the first digit of the dialed digits. The timeouts initial timer is activated when the call is accepted and is deactivated when the caller inputs the first digit. If the configured timeout value is exceeded, the caller is notified through the appropriate tone and the call is terminated.
To disable the timeouts initial timer, set the seconds value to 0.
The following example sets the initial digit timeout value on the Cisco MC3810 to 10 seconds:
voice-port 1/1 timeouts initial 10
| Command | Description |
Configures the interdigit timeout value for a voice port. | |
Configures the timeout value for releasing voice ports. |
seconds | Interdigit timeout duration in seconds. Valid entries are any integer from 0 to 120. |
10 seconds
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) T | This command was first introduced. |
Use the timeouts interdigit command to specify the number of seconds the system will wait (after the caller has input the initial digit) for the caller to input a subsequent digit of the dialed digits. The timeouts interdigit timer is activated when the caller inputs a digit and restarted each time the caller inputs another digit until the destination address is identified. If the configured timeout value is exceeded before the destination address is identified, the caller is notified through the appropriate tone and the call is terminated.
To disable the timeouts interdigit timer, set the seconds value to 0.
The following example sets the interdigit timeout value on the Cisco MC3810 for 10 seconds:
voice-port 1/1 timeouts interdigit 10
| Command | Description |
Configures the initial-digit timeout value for a voice port. | |
Configures the timeout value for releasing voice ports. |
seconds | The duration in seconds that a voice port stays in the call-failure state while the Cisco MC3810 sends a busy tone, reorder tone, or an out-of-service tone to the port. The range is 5 to 3600. The default is 30. |
infinity | The voice port is never released from call-failure state. |
30 seconds
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) MA | This command was first introduced. |
The following example configures voice port 1/1 on the Cisco MC3810 to stay in the call-failure state for 180 seconds while a busy tone, reorder tone, or out-of-service tone is sent to the voice port.
voice-port 1/1 timeouts wait-release 180
| Command | Description |
Configures the initial-digit timeout value for a voice port. | |
Configures the interdigit timeout value for a voice port. |
milliseconds | Minimum amount of time in milliseconds between the inactive seizure signal and the call being cleared. Valid entries on the Cisco MC3810 are numbers from 100 to 2000. Supported on E&M ports only. |
400 milliseconds
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) T | This command was first introduced. |
The following example configures the clear-wait duration on a Cisco MC3810 voice port to 300 milliseconds:
voice-port 1/1 timing clear-wait 300
| Command | Description |
Configures the delay signal duration for a voice port. | |
Configures the minimum delay time from outgoing seizure to outdial address for a voice port. | |
Configures the duration of the wink pulse for the delay dial for a voice port. | |
Configures the dialout delay for the sending digit on a voice port. | |
Configures the maximum wink signal duration for a voice port. | |
Configures the maximum wink-wait duration for a voice port. |
milliseconds | Delay signal duration for delay dial signaling, in milliseconds. Valid entries are numbers from 100 to 5000. Supported on E&M ports only. |
2000 milliseconds
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) T | This command was first introduced. |
The call direction for the timing delay-duration command is out.
The following example configures the delay signal duration on a Cisco MC3810 voice port to 3000 milliseconds:
voice-port 1/1 timing delay-duration 3000
| Command | Description |
Configures the minimum amount of time between the inactive seizure signal and the call being cleared for a voice port. | |
Configures the minimum delay time from outgoing seizure to outdial address for a voice port. | |
Configures the duration of the wink pulse for the delay dial for a voice port. | |
Configures the dialout delay for the sending digit on a voice port. | |
Configures the maximum wink signal duration for a voice port. | |
Configures the maximum wink-wait duration for a voice port. |
milliseconds | Minimum delay time in milliseconds from outgoing seizure to outdial address. Valid entries are numbers from 20 to 2000. Supported on E&M ports only. |
150 milliseconds
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) T | This command was first introduced. |
The call direction for the timing delay-start command is outgoing.
The following example configures the delay-start duration on a Cisco MC3810 voice port to 250 milliseconds:
voice-port 1/1 timing delay-start 250
| Command | Description |
Configures the minimum amount of time between the inactive seizure signal and the call being cleared for a voice port. | |
Configures the delay signal duration for a voice port. | |
Configures the duration of the wink pulse for the delay dial for a voice port. | |
Configures the dialout delay for the sending digit on a voice port. | |
Configures the maximum wink signal duration for a voice port. | |
Configures the maximum wink-wait duration for a voice port. |
milliseconds | Duration of the wink pulse for the delay dial, in milliseconds. Valid entries are numbers from 0 to 5000. Supported on E&M ports only. |
0 milliseconds
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) T | This command was first introduced. |
The following example configures the duration of the wink pulse for the delay dial on a Cisco MC3810 voice port to 10 milliseconds:
voice-port 1/1 timing delay-with-integrity 10
| Command | Description |
Configures the minimum amount of time between the inactive seizure signal and the call being cleared for a voice port. | |
Configures the delay signal duration for a voice port. | |
Configures the minimum delay time from outgoing seizure to outdial address for a voice port. | |
Configures the dialout delay for the sending digit on a voice port. | |
Configures the maximum wink signal duration for a voice port. | |
Configures the maximum wink-wait duration for a voice port. |
milliseconds | Dialout delay in milliseconds for the sending digit or cut-through on an FXO trunk or an E&M immediate trunk. Valid entries are 100 to 5000. |
300 milliseconds
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) MA1 | This command was first introduced. |
This command applies to only the Cisco MC3810.
The following example configures the dialout delay on a Cisco MC3810 voice port to 350 milliseconds:
voice-port 1/1 timing dialout-delay 350
| Command | Description |
Configures the minimum amount of time between the inactive seizure signal and the call being cleared for a voice port. | |
Configures the delay signal duration for a voice port. | |
Configures the minimum delay time from outgoing seizure to outdial address for a voice port. | |
Configures the duration of the wink pulse for the delay dial for a voice port. | |
Configures the maximum wink signal duration for a voice port. | |
Configures the maximum wink-wait duration for a voice port. |
milliseconds | The DTMF digit signal duration in milliseconds. Valid entries are numbers 50 to 100. Supported on FXO, FXS and E&M ports. |
100 milliseconds
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) T | This command was first introduced. |
The call signal direction for the timing digit command is outgoing.
The following example configures the DTMF digit signal duration on a Cisco MC3810 voice port to 50 milliseconds:
voice-port 1/1 timing digit 50
| Command | Description |
Configures the DTMF inter-digit duration for a voice port. |
milliseconds | Duration in milliseconds of the guard-out period. The range is 300 to 3000. |
2000 milliseconds
Voice-port configuration
| Release | Modification |
|---|---|
11.3 MA5 | This command was first introduced. |
This command is supported on FXO voice ports only
The following example configures the timing guard-out duration on a Cisco MC3810 voice port to 1000 milliseconds:
voice-port 1/1 timing guard-out 1000
milliseconds | DTMF inter-digit duration in milliseconds. Valid entries are numbers 50 to 500. Supported on FXO, FXS and E&M ports. |
100 milliseconds
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) T | This command was first introduced. |
The call signal direction for the timing interdigit command is outgoing.
The following example configures the DTMF inter-digit duration on a Cisco MC3810 voice port to 150 milliseconds:
voice-port 1/1 timing interdigit 150
| Command | Description |
Configures the DTMF digit signal duration for a voice port. |
percent | Percentage of the break period for dialing pulses. Valid entries are numbers 20 to 80. Supported on FXO and E&M ports only. |
50 percent
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) MA4 | This command was first introduced. |
The following example configures the break period percentage on a Cisco MC3810 voice port to 30 milliseconds:
voice-port 1/1 timing percentbreak 30
| Command | Description |
Configures the pulse dialing rate for a voice port. | |
Configures the pulse inter-digit timing for a voice port. |
pulses-per-second | Pulse dialing rate, in pulses per second. Valid entries are numbers 10 to 20. Supported on FXO and E&M ports only. |
20 pulses per second
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) T | This command was first introduced. |
The call signal direction for the timing pulse command is outgoing.
The following example configures the pulse dialing rate on a Cisco MC3810 voice port to 15 pulses per second:
voice-port 1/1 timing pulse 15
| Command | Description |
Configures the percentage of the break period for dialing pulses on a voice port. | |
Configures the pulse inter-digit timing for a voice port. |
milliseconds | Pulse dialing inter-digit timing in milliseconds. Valid entries are numbers 100 to 1000. Supported on FXO and E&M ports only. |
500 milliseconds
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) T | This command was first introduced. |
The call signal direction for the timing pulse-interdigit command is outgoing.
The following example configures the pulse-dialing inter-digit timing on a Cisco MC3810 voice port to 300 milliseconds:
voice-port 1/1 timing pulse-interdigit 300
| Command | Description |
Configures the percentage of the break period for dialing pulses on a voice port. | |
Configures the pulse dialing rate for a voice port. |
milliseconds | Maximum wink signal duration in milliseconds for a wink-start signal. Valid entries are numbers 100 to 400. Supported on E&M ports only. |
200 milliseconds
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) T | This command was first introduced. |
The call signal direction for the timing wink-duration command is outgoing.
The following example configures the wink signal duration on a Cisco MC3810 voice port to 300 milliseconds:
voice-port 1/1 timing wink-duration 300
| Command | Description |
Configures the minimum amount of time between the inactive seizure signal and the call being cleared for a voice port. | |
Configures the delay signal duration for a voice port. | |
Configures the minimum delay time from outgoing seizure to outdial address for a voice port. | |
Configures the duration of the wink pulse for the delay dial for a voice port. | |
Configures the maximum wink-wait duration for a voice port. |
milliseconds | Maximum wink-wait duration in milliseconds for a wink start signal. Valid entries are numbers 100 to 5000. Supported on E&M ports only |
200 milliseconds
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) T | This command was first introduced. |
The call signal direction for the timing wink-wait command is out.
The following example configures the wink-wait duration on a Cisco MC3810 voice port to 300 milliseconds:
voice-port 1/1 timing wink-wait 300
| Command | Description |
Configures the minimum amount of time between the inactive seizure signal and the call being cleared for a voice port. | |
Configures the delay signal duration for a voice port. | |
Configures the minimum delay time from outgoing seizure to outdial address for a voice port. | |
Configures the duration of the wink pulse for the delay dial for a voice port. | |
Configures the maximum wink-signal duration for a voice port. |
To specify the E&M interface type, use the type voice-port configuration command. Use the no form of this command to reset the default value.
type {1 | 2 | 3 | 5}
1 | Lead configuration: |
2 | Lead configuration: |
3 | Lead configuration: |
5 | Lead configuration: |
Lead configuration type is 1.
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) T | This command was first introduced. |
Use the type command to specify the E&M interface for a particular voice port. With type 1, the tie-line equipment generates the E-signal to the PBX type grounding the E-lead. The tie-line equipment detects the M-signal by detecting current flow to ground. If you select 1, a common ground must exist between the line equipment and the PBX.
With type 2, the interface requires no common ground between the equipment, thereby avoiding ground loop noise problems. The E-signal is generated toward the PBX by connecting it to SG. The M-signal is indicated by the PBX connecting it to SB. While Type 2 interfaces do not require a common ground, they do have the tendency to inject noise into the audio paths because they are asymmetrical with respect to the current flow between devices.
With type 3, the interface operates the same as Type 1 interfaces with respect to the E-signal. The M-signal, however, is indicated by the PBX connecting it to SB on assertion and alternately connecting it to SG during inactivity. If you select 3, a common ground must be shared between equipment.
With type 5, the Type 5 line equipment indicates E-signal to the PBX by grounding the E-lead. The PBX indicates M-signal by grounding the M-lead. A Type 5 interface is quasi-symmetrical in that while the line is up, current flow is more or less equal between the PBX and the line equipment, but noise injection is a problem.
The following example selects Type 3 as the interface type for your voice port on the Cisco MC3810:
voice-port 1/1 type 3
| Command | Description |
Selects a cabling scheme for an E&M analog voice port. | |
Specifies the signaling type for a voice port. |
To enable voice activity detection (VAD) for the calls using this voice port, use the vad voice-port configuration command. Use the no form of this command to disable VAD.
vadThis command has no arguments or keywords.
VAD is not enabled
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) T | This command was first introduced. |
Use the vad command to enable voice activity detection. With VAD, silence is not transmitted over the network, only audible speech. If you enable VAD, the sound quality will be slightly degraded but the connection will monopolize much less bandwidth. If you use the no form of this command, VAD is disabled on the voice-port.
The following example enables VAD on voice-port 1/1:
voice-port 1/1 vad
| Command | Description |
Generates background noise to fill silent gaps during calls if VAD is activated. |
To enable the two-beep confirmation tone for PLAR or PLAR Off Premises eXtension (OPX) connections, use the voice confirmation-tone voice-port command. Use the no form of this command to disable the two-beep confirmation tone.
voice confirmation-toneThis command has no arguments or keywords.
The two-beep confirmation tone is enabled on the PLAR or PLAR OPX connection.
Voice-port configuration
| Release | Modification |
|---|---|
11.3(1) MA5 | This command was first introduced as the voice-confirmation-tone-disable command. |
12.0(3) T | This command was changed to voice confirmation-tone. |
Use this command to enable the two-beep confirmation tone that a caller hears when picking up the handset for PLAR and PLAR OPX connections. This command is only valid if the voice port connection command is set to PLAR or PLAR OPX.
The following example enables the two-beep confirmation tone on voice port 1/1 on the Cisco MC3810:
voice-port 1/1 connection plar-opx voice confirmation-tone
| Command | Description |
Specifies a connection mode for a voice port. |
To place all voice ports associated with a serial or ATM interface into a busyout state, use the voice-port busyout interface configuration command. To remove the busyout state on the voice ports associated with this interface, use the no form of this command.
voice-port busyoutThis command has no arguments or keywords.
The voice port(s) on the interface are not in busyout state.
Interface configuration
| Release | Modification |
|---|---|
12.0(3) T | This command was first introduced. |
This command is supported on the Cisco MC3810 only.
This command busies out all voice port associated with the interface, except any voice ports configured to busyout under specific conditions using the busyout monitor and busyout-seized commands.
The following example turns the voice-port(s) associated with serial interface 1 into busyout state:
interface serial 1 voice-port busyout
The following example turns the voice-port(s) associated with ATM interface 0 into busyout state:
interface atm 0 voice-port busyout
| Command | Description |
busyout forced | Places a voice port into busyout monitor state. |
busyout-monitor | Specifies the busyout seize procedure for a voice port. |
busyout-seize | Displays information about the voice busyout state. |
show voice busyout | Places all voice ports associated with a serial or ATM interface into a busyout state. |
Posted: Tue May 4 07:06:54 PDT 1999
Copyright 1989-1999©Cisco Systems Inc.