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The term telephone port refers to the physical port on the router back panel. The term telephone interface refers to a logical interface that you must configure to make an analog telephone, fax, or modem connected to a telephone port work properly.
This chapter describes how to configure standard features of the telephone interfaces of Cisco 803, 804, and 813 routers. These routers support touch-tone analog telephones only; they do not support rotary telephones. This chapter also describes how to use the connected devices.
This section discusses the following:
Starting in global configuration mode, use these steps to configure physical characteristics. For information on the commands used in this table, refer to the Cisco IOS documentation set.
| Command | Purpose | |
|---|---|---|
Step 1 | pots country country | Enter the pots country ? command to get a list of supported countries and the code you must input to indicate a particular country. By specifying a country, you are configuring your telephone to use country-specific default settings for each physical characteristic. If you need to change a country-specific default setting, you can use the optional commands described in this table. |
Step 2 | pots line-type | Optional. Set line type. Line type 1 runs at |
Step 3 | pots dialing-method | Optional. Set dialing method. If you select overlap, the router transmits each digit dialed in a separate message. If you select enblock, the router collects all digits dialed and transmits in one message. To interrupt collection and transmission of dial-string digits, enter pound sign (#) or stop dialing digits until a timer runs out. |
Step 4 | pots disconnect-supervision | Optional. Set how router notifies the connected device when calling party has hung up. Japan typically uses the reversal option. Most other countries use the osi option. |
Step 5 | pots encoding {alaw | ulaw} | Optional. Set the pulse code modulation (PCM) encoding scheme. Europe typically uses the alaw option. North America typically uses the ulaw option. |
Step 6 | pots tone-source | Optional. Set who supplies dial, ringback, and busy tones. If you select local, the router supplies the tones. If you select remote, the telephone switch provides the tones. For more information, refer to the "Tones for NET3 Switch" section later in this chapter. |
Step 7 | pots ringing-freq | Optional. Set frequency at which telephone ports ring. |
Step 8 | pots disconnect-time interval | Optional. If a connected device, such as an answering machine, fails to detect that a calling party has hung up, you can adjust the interval that selected disconnect supervision method is applied. Interval is from 50 to 2000 milliseconds. |
Step 9 | pots silence-time interval | Optional. If a connected device, such as an answering machine, fails to detect that a calling party has hung up, you can adjust interval of silence after a hang-up. Interval is from 0 to 10 seconds. |
Step 10 | pots distinctive-ring-guard- | Optional. Set delay in milliseconds (0 to 1000) before a telephone port can be rung after a previous call is disconnected. For more information, refer to the "Distinctive Ringing" section later in this chapter. |
Step 11 | show pots status | Optional. Display settings of physical characteristics as well as other information on telephone interfaces. |
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Note This command applies only to ISDN lines connected to a NET3 switch. |
If the pots dialing-method command is set to enblock, the router provides the internal dial tone.
You can connect multiple devices (analog telephone, fax machine, or modem) to a router telephone port. The number of devices that you can connect depends on the following:
If the REN of each device you plan to connect is one, then you can connect a maximum of five devices to that particular telephone port.
You can create a dial peer to determine how incoming calls are routed to the telephone ports. You can create a total of six dial peers for the two telephone ports. There are no restrictions on how many dial peers you can create per port; for example, you can create six dial peers for port 1 and zero on port 2. Starting from global configuration mode, use the steps in this table to create a dial peer.
| Command | Purpose | |
|---|---|---|
Step 1 | dial-peer voice tag pots | Set up tag number (1 through 6) for dial peer. |
Step 2 | destination-pattern ldn | Specify local ISDN directory number assigned to telephone interface. Do not specify an area code. |
Step 3 | port port-number | Specify number (1 or 2) associated with telephone port. |
Step 4 | no call-waiting | Optional. Disable call waiting. |
Step 5 | ring cadence-number | Optional.Set up distinctive ring (0 |
Step 6 | show dial-peer voice [tag] | Optional. Display all or a particular dial-peer configuration (1 through 6). |
For example, if you have connected one voice device (555-1111) to port 1 and another (555-2222) to port 2, you can create two dial peers. The following output example shows two dial peers:
dial-peer voice 1 pots
destination-pattern 5551111
port 1
no call-waiting
ring 0 dial-peer voice 2 pots
destination-pattern 5552222
port 2
no call-waiting
ring 0
When a caller dials 555-1111, the call is routed to port 1. When a caller dials 555-2222, the call is routed to port 2. If the dial peers are not created, calls to both numbers are routed to port 1.
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Note Make sure that all ISDN directory numbers associated with a SPID are in turn associated with one port. For example, if 555-1111 and 555-2222 are associated with SPID1 and you associate 555-1111 to port 1 and 555-2222 to port 2, you will not be able to make outgoing calls on ports 1 and 2 simultaneously. |
North America uses service profile identifiers (SPIDs) to identify subscribed services. The SPID format is generally an ISDN telephone number with several numbers added to it, such as 40855511110101. Your ISDN line could be assigned zero, one, or two SPIDs.
You must associate a SPID with an ISDN directory number and a telephone port number by using the isdn spid1 and isdn spid2 commands in global configuration mode and the port command in dial peer configuration mode, respectively. Make sure that you specify all of the ISDN directory numbers provided by your telephone service provider in the isdn spid1 and isdn spid2 commands. Also make sure that all ISDN directory numbers associated with a SPID are in turn associated with the same telephone port. For information on using the port command while setting up a dial peer, see the "Creating Dial Peers" section earlier in this chapter.
Starting from global configuration mode, follow these steps:
| Command | Purpose | |
|---|---|---|
Step 1 | interface bri0 | Specify parameters for the WAN interface. |
Step 2 | isdn incoming-voice modem | Specify that incoming ISDN voice calls are forwarded to devices connected to telephone ports. |
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Note If you do not enter the isdn incoming-voice modem command, the router rejects incoming ISDN voice calls. |
This section describes advanced telephone features and how to configure them.
You can configure the router so that data calls are handled in one of the following ways:
Use this table to reconfigure the priority.
| Command | Purpose | |
|---|---|---|
| isdn voice-priority local-directory-number | Configure ISDN voice priority for each ISDN directory number. |
If you have multiple ISDN directory numbers associated with a SPID, then the outgoing voice priority that you set for any of these directory numbers applies to the other numbers.
For example, if you enter the following command, the outgoing voice priority for all directory numbers specified in the isdn spid1 command is set to conditional:
router(config-if)# isdn spid1 0 4085551111 4085552222 4085553333 router(config-if)# isdn voice-priority 5551111 out conditional
Table 7-1 describes the possible data call scenarios, what happens when a voice call comes in, and what happens when you place an outgoing voice call with a particular configuration.
| Scenario | Always | Conditional | Off |
|---|---|---|---|
Two data channels to destination A. | Bump one data channel when you pick up handset to answer incoming voice call or to place outgoing voice call. | Bump one data channel when you pick up handset to answer incoming voice call or to place outgoing voice call. | No bump; voice caller receives busy signal. |
One data channel to destination A; | Bump one data channel when you pick up handset to answer incoming voice call or to place outgoing voice call. | No bump; voice caller receives busy signal. | No bump; voice caller receives busy signal. |
The setting of the pots dialing-method command affects when you hear a busy signal if a data call cannot be bumped when you are trying to make an outgoing call. If the setting is overlap, you hear a busy signal when you pick up the handset. If the setting is enblock, you hear a dial tone initially, then a busy signal.
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Note This section applies only to analog telephone services in the U.S. |
The router recognizes the difference between a data call and a voice call. Incoming data calls are routed to the LAN over the Ethernet port. If a telephone interface has been configured for DOV, incoming data calls made with VBC are routed to the LAN over the Ethernet port. Figure 7-1 illustrates a data call being routed to the LAN.
Incoming voice calls are forwarded to the analog device over the analog telephone port, as shown in Figure 7-2.
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Note When the router is configured for DOV, ISDN BRI calls are made with VBC, which has a data rate of 56 kbps, instead of the usual ISDN BRI data rate of 64 kbps. |
Use the following command to configure the router to accept incoming DOV calls:
| Command | Purpose | |
|---|---|---|
| isdn incoming-voice data 56 | Configure router to accept incoming DOV calls. |
Follow these steps to configure the router to place outgoing DOV calls:
| Command | Purpose | |
|---|---|---|
Step 1 | class voice number | Create a dialer map. |
Step 2 | map-class dialer voice | Define a class of shared configuration parameters for outgoing calls. |
Step 3 | dialer voice-call | Configure router to make outgoing DOV calls. |
Step 4 | dialer isdn speed 56 | Specify bit rate used on B channel associated with specified map class. |
Because the router associates a distinctive ring with the ISDN directory number assigned to an interface, you must configure a distinctive ring with a dial peer. For information on dial peers and how to configure them, refer to the "Creating Dial Peers" section earlier in this chapter.
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Note Generally your telephone service provider assigns one ISDN directory number for each SPID. You must have one ISDN directory number for each distinctive ring that you set up. Therefore, if you want to set up two distinctive rings, you must request an additional ISDN directory number from your telephone service provider. |
To configure the ringing cadence, insert the following commands into a dial-peer configuration:
ring cadence-number
where cadence-number can be 0, 1, or 2.
By default, the ring cadence is set to 0, which means that the interface uses the primary ringing cadence.
You can also insert the following command syntax into a dial-peer configuration:
pots distinctive-ring-guard-time milliseconds
where milliseconds can be a number from 50 to 1000. This command configures the delay in milliseconds before a telephone port can be rung after a previous call is disconnected. The default is no delay.
The Cisco 800 series routers do not support the following devices:
This section describes how to make a basic call and how to use the supplementary services that you ordered from your telephone service provider.
To make a basic telephone call, pick up the handset, and dial the number of the desired party.
To make a basic call if your router is connected to a Nippon Telegraph and Telephone (NTT) switch, follow these steps:
You must enter each digit within 12 seconds of entering the previous digit. If you wait longer than 12 seconds, an incomplete set of digits is sent to the switch.
Step 2 Send the entire set of digits to the switch by using one of the following methods:
You can disable the end-of-call function (initiated by pressing the pound key [#]) by entering the following command on the telephone keypad:
**98#
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Note This command applies only to ISDN lines connected to an NTT switch. |
You can disable this function if a telephone number you are dialing requires the pound key (#) as one of the digits. After entering the **98# command, wait for a dial tone, then enter the digits, including the pound key. To send the digits to the switch, wait 6 seconds without entering any digits.
The end-of-call function automatically resumes for the next call.
This section describes how to use the following supplementary services:
For this feature to work, you must request it when you order your ISDN line. For information on ordering your ISDN line, refer to "Provisioning the ISDN Line." However, you do not need to configure the router to make this feature work.
You can put an active voice call on hold, make a second call, and toggle between the two calls. Use the following steps:
Step 2 Make the second call.
Step 3 Toggle between the two calls by quickly pressing the flash button.
If you hang up with a call still on hold, the phone rings to remind you of the outstanding call. Pick up the handset to reconnect to the call.
For this feature to work, you must request it when you order your ISDN line. For information on ordering your ISDN line, refer to "Provisioning the ISDN Line."
By default, call waiting is enabled. You can disable it permanently by using the no call-waiting command. (You might want to disable it for fax machines and modems.) Because the router associates call waiting with the ISDN directory number assigned to a telephone interface, you should disable call waiting at the same time that you are configuring a dial peer. For information on dial peers and how to configure them, refer to the "Creating Dial Peers" section earlier in this chapter.
To disable call waiting on a per-call basis, enter **99# on the telephone keypad.
During an active voice call, a call-waiting tone sounds if another call comes in. Subsequent tones sound at 10-second intervals until the incoming caller hangs up or until you answer the call. During this time, the incoming caller hears ringing.
When you hear the call-waiting tone, you can do one of the following:
To put the current call on hold and answer the incoming call, quickly press the telephone receiver (flash) button once. Press this button again to go back to the current call.
For this feature to work, you must request it when you order your ISDN line. For information on ordering your ISDN line, see "Provisioning the ISDN Line."
If you are connected to a National ISDN-1 (NI1) or a Northern Telecom DMS-100 custom switch, you might need to activate this feature by using the following command syntax:
isdn conference-code range
The range is from 0 to 999. The default code is 60. Your telephone service provider should provide a code when you order this feature; if they provide a code other than 60, you need to reconfigure the code using the isdn conference-code command.
Otherwise, you do not need to configure the router to make this feature work.
You can talk simultaneously with two other parties. To create a conference call, follow these steps:
Step 2 Dial the second party.
Step 3 Add the first party to the call by quickly pressing the flash button.
For this feature to work, you must request it when you order your ISDN line. For information on ordering your ISDN line, see "Provisioning the ISDN Line."
If you are connected to a National ISDN-1 (NI1) or a Northern Telecom DMS-100 Custom switch, you might need to activate this feature using the following command syntax:
isdn transfer-code range
The range is from 0 to 999. The default code is 61. Your telephone service provider should provide a code when you order this feature; if they provide a code other than 61, you need to reconfigure the code by using the isdn transfer-code command.
Otherwise, you do not need to configure the router to make this feature work.
You can transfer an incoming or outgoing voice call to another party. To transfer a call, do the following:
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Note If you are connected to a NTT switch, you will not be able to transfer an outgoing call. |
Step 2 Dial the second party that you want to transfer the call to.
Step 3 While still connected to the second party, hang up.
Hanging up connects the first and second parties. Instead of doing Step 3, you can also create a three-way call conference by quickly pressing the flash button once.
If the call to the second party fails, you can return to the first party by doing one of the following:
If you hang up, the telephone rings to indicate that the first party is still on hold.
The call forwarding feature works for Sweden and Finland only. For this feature to work, you must request it when you order your ISDN line. For information on ordering your ISDN line, refer to "Provisioning the ISDN Line."
The router supports the following call forwarding features:
To make sure that the router accepts the activation and deactivation of the call forwarding features using the telephone keypad, use the pots country country command in global configuration mode. The country variable is the country that your router is in. Enter the pots country ? command to get a list of supported countries and the code you must enter to indicate a particular country.
To activate call forwarding unconditional, call forwarding no reply, or call forwarding busy, follow these steps:
Step 2 Enter the following on the telephone keypad:
*feature-number *telephone-number-to-forward-to#
Your telephone service provider should provide the number for each call forwarding feature. For example, to forward a call to 408-555-2222, enter the following:
*21*4085552222#
Step 3 Hang up the handset.
To deactivate call forwarding unconditional, call forwarding no reply, or call forwarding busy, follow these steps:
Step 2 Enter the following on the telephone keypad:
#feature-number#
Your telephone service provider should provide the number for each call forwarding feature. For example, to deactivate call forwarding, enter the following:
#21#
Step 3 Hang up the handset.
Posted: Wed May 24 16:36:08 PDT 2000
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