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Some commands vary depending on whether you are configuring an E1 or a T1 controller. Table 3-1 lists the T1 and E1 controller commands, and the controllers on which each is supported.
| E1 and T1 Controller Commands | Supported on E1 | Supported on T1 |
|---|---|---|
| X | |
| X | |
X | X | |
X | X | |
X | X | |
X | X | |
| X | |
X | X | |
X | X | |
X | X | |
X | X | |
X | X |
To configure transmit and receive levels for a cable length (line build-out) longer than 655 feet for a T1 trunk with a CSU interface, use the cablelength long controller configuration command. Use the no form of this command to restore the default.
cablelength long {gain26 | gain36} {-15db | -22.5db | -7.5db | 0db}
gain26 | Sets the receive sensitivity to 26 dB if the hardware has configurable receive sensitivity. The T1 controller in the Cisco MC3810 has a fixed receive sensitivity of 36 dB. Cisco recommends entering gain36 so that the CLI entry matches the actual value. |
gain36 | Sets the receive sensitivity to 36 dB if the hardware has configurable receive sensitivity. The T1 controller in the Cisco MC3810 has a fixed receive sensitivity of 36 dB. |
-15db | Sets the transmit attenuation to 15 dB. |
-22.5db | Sets the transmit attenuation to 22.5 dB. |
-7.5db | Sets the transmit attenuation to 7.5 dB. |
0db | Sets the transmit attenuation to 0 dB. This is the default. |
The receive sensitivity value appearing in CLI is 26; the hardware is fixed at 36.
Transmit attenuation is 0 dB.
Controller configuration
| Release | Modification |
|---|---|
11.3 MA | This command was first introduced. |
This command is supported on T1 controllers of type CSU (long haul) only. If you enter the cablelength long command on a DSX-1 (short haul) interface, the command will be rejected.
Use the show controller t1 command to determine whether a controller is a CSU type.
This command applies to Voice over Frame Relay, Voice over ATM, and Voice over HDLC on the Cisco MC3810.
In the Cisco MC3810 MFT and DVM hardware, the receive sensitivity is fixed at 36 dB and is unaffected by the cablelength long {gain26 | gain36} command. Cisco recommends entering the gain36 value so that the CLI entry will match the actual value.
The transmit attenuation value is best obtained by experimentation. If the signal received by the far-end equipment is too strong, reduce the transmit level by entering additional attenuation.
The following example changes the CLI receive sensitivity to match the actual receive sensitivity of the hardware and adds 15 dB of attenuation to the transmit signal from controller T1 0:
controller T1 0 cablelength long gain36 -15db
| Command | Description |
cablelength short | Sets transmit attenuation for a for a cable length (line build-out) of 655 feet or shorter for a T1 trunk with a DSX-1 interface. |
framing (E1/T1 controller) | Selects the frame type for the E1 or T1 data line. |
show controller t1 number | Displays controller status that is specific to the controller hardware. |
To configure transmit attenuation for a cable length (line build-out) of 655 feet or shorter for a T1 trunk with a DSX-1 interface, use the cablelength short controller configuration command. The no form of this command restores the default.
cablelength short {133 | 266 | 399 | 533 | 655}
133 | Cable length of 0 to 133 feet. |
266 | Cable length of 134 to 266 feet. |
399 | Cable length of 267 to 399 feet. |
533 | Cable length of 400 to 533 feet. |
655 | Cable length of 534 to 655 feet. |
Transmit attenuation for a cable length of 0 to 133 feet.
Controller configuration
| Release | Modification |
|---|---|
11.3 MA | This command was first introduced. |
This command is supported on T1 controllers of type DSX-1 (short haul) only. If you enter the cablelength short command on a CSU (long haul) interface, the command will be rejected.
Use the show controller t1 command to determine whether a controller is a DSX-1 type.
This command applies to Voice over Frame Relay, Voice over ATM, and Voice over HDLC on the Cisco MC3810.
| Command | Description |
cablelength long | Sets transmit and receive levels for a cable length (line build-out) longer than 655 feet for a T1 trunk with a CSU interface. |
framing (E1/T1 controller) | Select the frame type for the E1 or T1 data line |
show controller t1 number | Displays controller status that is specific to the controller hardware. |
The following example sets the transmit attenuation of controller T1 1 to the appropriate levels for a cable between 134 and 266 feet long:
controller T1 1 cablelength short 266
To configure a list of timeslots for voice channels on controller T1 0 or E1 0, use the channel-group controller configuration command. Use the no form of this command to delete the channel group.
channel-group channel-no timeslots timeslot-list speed {56 | 64}
channel-no | ID number to identify the channel group. The valid range is 0 to 31. |
timeslot list | Timeslots (DS0s) to include in this channel group.The valid timeslots are: 1 to 24 for T1; 1 to 15 and 17 to 31 for E1. |
speed {56 | 64} | The speed of the underlying DS0s: 56 kbps, or 64 kbps. If you specify 56 kbps, the channel group is limited to 14 channels on the Cisco MC3810 MFT. Because 56 is the default, you should specify 64 if you need more than 14 channels. |
56 kbps (for T1).
64 kbps (for E1).
Controller configuration
| Release | Modification |
|---|---|
11.3 MA | This command was first introduced. |
This command applies to the configuration of Voice over Frame Relay, Voice over ATM, and Voice over HDLC on the Cisco MC3810.
This command creates a logical interface, serial 0:channel (s0:x) on controller T1 0 or E1 0 (MFT).
Only one channel group can be configured on a controller.
The following example configures a channel group on controller T1 0 on a Cisco MC3810:
controller T1 0 channel-group 10 timeslots 10-24 speed 64
line | The controller recovers external clock from the line and provides the recovered clock to the internal (system) clock generator. The line value is the default clock source for the MFT. |
internal | The controller synchronizes itself to the internal (system) clock. The internal value is the default clock source for the DVM. |
loop-timed | The T1/E1 controller recovers clock from the Rx (line) and uses it for Tx. This setting decouples the controller clock from the system-wide clock set with the network-clock-select command. The loop-timed clock enables the digital voice module (DVM) to connect to a PBX and to connect the Multiflex Trunk (MFT) to a central office when both the PBX and the central office function as DCE clock sources. This situation assumes that the PBX also takes the clocking from the central office thereby synchronizing the clocks on the DVM and the MFT. |
Clock source is line for controller T1 0 or E1 0.
Clock source is internal for controller T1 1 or E1 1.
Controller configuration
| Release | Modification |
|---|---|
11.1 | This command was first introduced. |
This command applies to Voice over Frame Relay, Voice over ATM, and Voice over HDLC on the Cisco MC3810.
If a controller is specified as a primary or backup clock source by the network-clock-select command, it must be set for clock source line. Whenever it is not acting as the current clock source, it will automatically operate in loop-timed mode. Only one T1/E1 controller at a time can recover network clock and distribute it to the internal clock generator.
The following example configures the MFT clock source for internal and the DVM clock source for line:
controller T1 0 clock source internal controller T1 1 clock source line
| Command | Description |
network-clock-select | Sets the selection priority for a clock source. |
Use the framing controller configuration command to select the frame type for the E1 or T1 data line.
For T1 lines:
framing {sf | esf}For E1 lines:
framing {crc4 | no-crc4} [australia]
sf | Super frame is the T1 frame type. |
esf | Extended super frame is the T1 frame type. |
crc4 | CRC4 frame is the E1 frame type. |
no-crc4 | CRC4 frame is not the E1 frame type. |
australia | (Optional) E1 frame type used in Australia. |
Super frame is the default on a T1 line.
CRC4 frame is the default on an E1 line.
Controller configuration
| Release | Modification |
|---|---|
11.3 MA | This command was first introduced. |
Use this command in configurations where the router or access server is intended to communicate with T1 or E1 fractional data line. The service provider determines which framing type, either sf, esf, or crc4, is required for your T1/E1 circuit.
The following example selects extended super frame as the T1 frame type:
framing esf
| Command | Description |
cablelength | Sets the gain according to the length of the T1 or E1 line. |
linecode | Sets the line encoding method. |
For T1 lines:
linecode {ami | b8zs}For E1 lines:
linecode {ami | hdb3}
ami | Alternate mark inversion (AMI) line-code type. Valid for both T1 and E1 controllers. |
b8zs | B8ZS line-cole type. Valid for T1 controller only. |
hdb3 | High-density bipolar 3 (HDB3) line-code type. Valid for E1 controller only. |
HDB3 line code is the default for E1 lines.
AMI line code is the default for T1 lines.
Controller configuration
| Release | Modification |
|---|---|
10.3 | This command was first introduced. |
Use this command in configurations where the router or access server must communicate with T1 fractional data lines. The T1 service provider determines which line-code type, ami or b8zs, is required for your T1 circuit. The E1 service provider determines which line-code type, ami or hdb3, is required for your E1 circuit.
The following example specifies B8ZS as the line-code type for a T1 line:
linecode b8zs
| Command | Description |
cablelength | Sets the gain according to the length of the T1 or E1 line. |
framing (E1/T1 controller) | Select the frame type for the E1 or T1 data line. |
This command has no arguments or keywords.
Loop detection is disabled.
Controller configuration
| Release | Modification |
|---|---|
11.3 MA | This command was first introduced. |
This command applies to Voice over Frame Relay, Voice over ATM, and Voice over HDLC on the Cisco MC3810.
The following example configures loop detection for controller T1 0:
controller T1 0 loop-detect
| Command | Description |
Places the T1 or E1 line into loopback mode. |
For E1:
loopback {local | line | payload}For T1:
loopback {local | remote | line | payload}
local | The controller loops the internal signal back to the internal bus in the Cisco MC3810. |
line | The controller loops the external line signal back toward the network without reframing the DS1 signal. |
payload | The controller loops the external line signal back toward the network and reframes the DS1 signal. |
remote | For T1 only. The T1 controller sends the inband loop-up code to the remote device, which is assumed to have CSU functionality. The remote device detects the code and loops the line back to the Cisco MC3810. If the Cisco MC3810 detects its own code, the loopback is successful. If the Cisco MC3810 does not detect its own code within 10 seconds, the loopback is not successful. |
Local is the default for T1 and E1 lines.
Controller configuration
| Release | Modification |
|---|---|
11.1 | This command was first introduced. |
This command applies to Voice over Frame Relay, Voice over ATM, and Voice over HDLC on the Cisco MC3810.
The following example establishes a loopback of the incoming T1 signal on controller T1 0:
controller T1 0 loopback line
| Command | Description |
Enables loop detection for T1. |
atm | Sets the controller into ATM mode and creates an ATM interface (ATM 0) on the Cisco MC3810. When ATM mode is enabled, no channel groups, voice groups, PRI groups, or TDM groups are possible, because ATM occupies all the DS0s on the T1/E1 trunk. When you set the controller to ATM mode, the controller framing is automatically set to ESF for T1 or CRC4 for E1. The linecode is automatically set to B8ZS for T1 or HDBC for E1. When you remove ATM mode by entering the no mode atm command, ATM interface 0 is deleted. ATM mode is supported on controller 0 only (T1 0 or E1 0). |
cas | Sets the controller into channel associated signaling (CAS) mode and enables the voice-group command, which allows you to create voice groups. CAS mode is supported on controllers 0 and 1. |
ccs cross-connect | Sets the controller into transparent Common Channel Signaling (CCS) mode and enables the voice-group command, which allows you to create voice groups. HDLC frames from a CCS D-channel timeslot are cross-connected to a TDM group or to a serial port. Transparent CCS mode is supported on controller 1 only (T1 1 or |
ccs frame-forwarding | Sets the controller into transparent CCS mode and enables the voice-group command, which allows you to create voice groups. It creates interface serial 1:x, where x is 23 on controller T1 1 and x is 15 on controller E1 1. HDLC frames from a CCS D channel are forwarded to a preconfigured Frame Relay DLCI or to an ATM PVC. Transparent CCS mode is supported on controller 1 only (T1 1 or |
No mode is configured.
Controller configuration
| Release | Modification |
|---|---|
11.3 MA | This command was first introduced with only the mode cas option. |
12.0 | The mode atm option was added. |
12.0(2) T | The ccs cross-connect and ccs frame-forwarding options were added. |
This command applies to the Cisco MC3810 with the digital voice module (DVM) installed.
If no mode is configured, only channel groups, PRI groups, and TDM groups (in data mode) can be configured. Channel groups and TDM groups are created using the channel group and tdm-group commands, respectively.
On the Cisco MC3810, some DS0s are used exclusively for different signaling modes. DS0 channels have the following limitations when mixing different applications (such as voice and data) on the same network trunk:
The no form of the command is not accepted if there are voice groups configured on the controller.
The following example configures ATM mode on controller T1 0:
controller T1 0 mode atm
The following example configures CAS mode on controller T1 1:
controller T1 1 mode cas
| Command | Description |
Configures a list of timeslots for voice channels on the T1 controller | |
Configures a list of timeslots for creating clear channel groups (pass-through) for Time Division Multiplexing (TDM) cross-connect. | |
Configures a list of timeslots for voice Channel Associated Signaling (CAS) on the T1/E1 controller. |
To specify ISDN Primary Rate Interface (PRI) on a channelized T1 or E1 controller, use the pri-group controller configuration command. Use the no form of this command to remove the ISDN-PRI configuration.
pri-group [timeslots range ]
timeslots range | (Optional) Specifies a single range of values from 1 to 23 for channelized T1 and from 1 to 31 for channelized E1. |
No ISDN-PRI configuration is configured.
Controller configuration
| Release | Modification |
|---|---|
12.0(2) T | This command was enabled for the Cisco MC3810. |
This command applies to the configuration of Voice over Frame Relay, Voice over ATM, and Voice over HDLC on the Cisco MC3810.
Before you enter the pri-group command, you must specify an ISDN-PRI switch type and an E1 or T1 controller. Only one pri group can be configured on a controller.
The following example configures ISDN-PRI on all timeslots of controller T1 1 on a Cisco MC3810:
isdn switch-type primary-qsig-master controller T1 1 pri-group timeslots 1-23
| Command | Description |
isdn switch-type | Configures the Cisco MC3810 PRI interface to support QSIG signaling. |
tdm-group-no | TDM group number. The valid range is 0 to 31. |
timeslot-list | Timeslots (DS0s) to include in this TDM group. The valid timeslots are: 1 to 24 for T1; 1 to 15 and 17 to 31 for E1. |
type | (Valid only when the mode cas command is enabled.) Specifies the voice signaling type of the voice port. If configuring a TDM group for data traffic only, do not specify the type option. Choose from one of the following options: |
| · e&m---for E&M signaling · fxo---for Foreign Exchange Office signaling (optionally, you can also specify loop-start or ground-start) · fxs---for Foreign Exchange Station signaling (optionally, you can also specify loop-start or ground-start) · e&m-melcas---for E&M Mercury Exchange Limited (MEL) Channel Associated Signaling · fxs-melcas--- for Foreign Exchange Station Mercury Exchange Limited (MEL) Channel Associated Signaling · fxo-melcas---for Foreign Exchange Office Mercury Exchange Limited (MEL) Channel Associated Signaling The melcas options apply only to E1 lines and are used primarily in the United Kingdom. |
No TDM group is configured.
Controller configuration
| Release | Modification |
|---|---|
11.3 MA | This command was first introduced. |
This command applies to the configuration of Voice over Frame Relay, Voice over ATM, and Voice over HDLC on the Cisco MC3810.
The following example configures TDM group number 20, containing DS0s 2, 5, 7, 9-12, and 21, on controller T1 1 to support FXS ground-start signaling:
controller T1 1 mode cas tdm-group 20 timeslots 2,5,7,9-12,21 type fxs ground-start
| Command | Description |
Sets the mode of the T1/E1 controller and enters specific configuration commands for each mode type. |
voice-group-no | Number to identify the voice group. The valid range is 0 to 23. |
timeslot-list | Timeslots (DS0s) to include in this voice group. The valid timeslots are: 1 to 24 for T1; 1 to 15 and 17 to 31 for E1. |
type | Signaling type: · e&m-immediate---for E&M immediate · e&m-delay---for E&M delay · e&m-wink---for E&M wink · e&m-melcas---for E&M Mercury Exchange Limited (MEL) Channel Associated Signaling · fxs-ground-start---for Foreign Exchange Station ground-start · fxs-loop-start---for Foreign Exchange Station loop-start · fxs-melcas--- for Foreign Exchange Station Mercury Exchange Limited (MEL) Channel Associated Signaling · fxo-ground-start---for Foreign Exchange Office ground-start · fxo-loop-start---for Foreign Exchange Office loop-start · fxo-melcas---for Foreign Exchange Office Mercury Exchange Limited (MEL) Channel Associated Signaling · ext-sig-master ---configures this Cisco MC3810 to establish permanent calls on all voice ports in this voice group · ext-sig-slave---configures this Cisco MC3810 to wait for call setup to be received The melcas options are used primarily in the United Kingdom. |
No voice group is configured.
Controller configuration
| Release | Modification |
|---|---|
11.3 MA | This command was first introduced. |
12.0(2) T | The ext-sig-master and ext-sig-slave commands were added. |
This command applies to the configuration of Voice over Frame Relay, Voice over ATM, and Voice over HDLC on the Cisco MC3810.
This command is only available if the mode cas or mode ccs command is enabled.
The following example configures voice group number 10, containing DS0s 1 through 12, on controller T1 0 to support E&M immediate-start signaling
controller t1 0 mode cas voice-group 10 timeslots 1-12 e&m-immediate
| Command | Description |
Configures a list of timeslots for voice channels on a T1/ E1 controller. | |
Sets the mode of the T1/E1 controller and enters specific configuration commands for each mode type. | |
Configures a list of time slots for creating clear channel groups (pass-through) for Time Division Multiplexing (TDM) cross-connect. |
Posted: Mon May 3 15:09:45 PDT 1999
Copyright 1989-1999©Cisco Systems Inc.