Cisco Router 800 Series Software Configuration Guide
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6-5 Cisco 800 Series Software Configuration Guide 78-5372-06 Chapter 6 Configuring Telephone Interfaces Creating Dial Peers 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.Command Purpose Step 1dial-peer voice tag potsSet up tag number (1 through 6) for dial peer. Step 2destination-pattern ldnSpecify local ISDN directory number assigned to telephone interface. Do not specify an area code. Step 3port port-numberSpecify number (1 or 2) associated with telephone port. Step 4no call-waitingOptional. Disable call waiting. Step 5ring cadence-numberOptional. Set up distinctive ring (0 through 2). For more information, see the “Distinctive Ringing” section on page 6-11. Step 6show dial-peer voice [tag] Optional. Display all or a particular dial-peer configuration (1 through 6).
Chapter 6 Configuring Telephone Interfaces Forwarding Incoming ISDN Voice Calls to Connected Devices 6-6 Cisco 800 Series Software Configuration Guide 78-5372-06 NoteMake sure that all ISDN directory numbers associated with a service profile identifier (SPID) are associated with one port. For example, if both 555-1111 and 555-2222 are associated with SPID 1 and you associate 555-1111 to port 1 and 555-2222 to port 2, you will not be able to make calls on ports 1 and 2 simultaneously. What You Need to Know About SPIDs North America uses 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. Make sure that you specify all 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 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 on page 6-4. Forwarding Incoming ISDN Voice Calls to Connected Devices Starting from global configuration mode, follow these steps: Command Purpose Step 1interface bri0Specify parameters for the WAN interface. Step 2isdn incoming-voice modemSpecify that incoming ISDN voice calls are forwarded to devices connected to telephone ports.
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Cisco 800 Series Software Configuration Guide
78-5372-06
Chapter 6 Configuring Telephone Interfaces
Configuring Advanced Telephone Features
NoteIf you do not enter the isdn incoming-voice modem command, the router rejects
incoming ISDN voice calls.
Configuring Advanced Telephone Features
This section describes advanced telephone features and how to configure them.
ISDN Voice Priority
The ISDN voice priority feature controls the priority of data and voice calls for
telephones or fax machines connected to the router telephone ports. If an ISDN
circuit endpoint is busy with a data call or calls and either a voice call comes in
(incoming) or you attempt to place a voice call (outgoing), the data call is handled
per the voice priority setting.
You can configure the router so that data calls are handled in one of the following
ways:
A voice call always supercedes (“bumps”) a data call. This is the default
setting.
A voice call supercedes a data call only if there are more than one call to the
same destination.
A voice call never supercedes a data call.
Use the following command to reconfigure the priority.
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. Command Purpose
isdn voice-priority
local-directory-number
{in | out} {always | conditional |
off}Configure ISDN voice priority for each
ISDN directory number.
Chapter 6 Configuring Telephone Interfaces Configuring Advanced Telephone Features 6-8 Cisco 800 Series Software Configuration Guide 78-5372-06 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 4 0 8 5 5 5 1111 4 0 8 5 5 5 2 2 2 2 4 0 8 5 5 53333router(config-if)# isdn voice-priority 5551111 out conditional Ta b l e 6 - 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. The setting of the pots dialing-method command determines whether 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. Table 6-1 Incoming and Outgoing ISDN Voice Priority Scenarios 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; one data channel to destination B.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.
6-9 Cisco 800 Series Software Configuration Guide 78-5372-06 Chapter 6 Configuring Telephone Interfaces Configuring Advanced Telephone Features Data over Voice Bearer Service NoteThis section applies only to analog telephone services in the U.S. In some tariff areas, voice calls are less expensive than data calls. If this is the case in your tariff area, the Cisco 800 series routers support incoming and outgoing data over voice (DOV) calls. DOV calls are data calls made over the ISDN line using voice bearer capability (VBC). 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 6-1 and Ta b l e 6 - 2 illustrate 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 6-2 and Ta b l e 6 - 3. Figure 6-1 Data Call over VBC Line 7493741 2 3
Chapter 6 Configuring Telephone Interfaces Configuring Advanced Telephone Features 6-10 Cisco 800 Series Software Configuration Guide 78-5372-06 Figure 6-2 Voice Call over VBC Line Table 6-2 Key for Data Call over VBC Line Callout Number Description 1 Analog telephone 2 ISDN BRI line with VBC 3 Central office switch 4 Ethernet LAN 74938 1 2 4 3 Table 6-3 Key for Voice Call over VBC Line Callout Number Description 1 Analog telephone 2 ISDN BRI line with VBC 3 Router 4 Ethernet LAN
6-11 Cisco 800 Series Software Configuration Guide 78-5372-06 Chapter 6 Configuring Telephone Interfaces Configuring Advanced Telephone Features NoteWhen 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: isdn incoming-voice data 56 Follow these steps to configure the router to place outgoing DOV calls: Distinctive Ringing A ringing cadence is a pattern of a ringing and a quiet period. There are two types of ringing cadences: a primary ringing cadence and distinct ringing. The primary cadence is determined by the country where your router is located. In addition to the primary cadence, you can configure up to two distinctive rings on a telephone port. 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, see the “Creating Dial Peers” section on page 6-4. Command Purpose Step 1class voice numberCreate a dialer map. Step 2map-class dialer voiceDefine a class of shared configuration parameters for outgoing calls. Step 3dialer voice-callConfigure router to make outgoing DOV calls. Step 4dialer isdn speed 56Specify bit rate used on B channel associated with specified map class.
Chapter 6 Configuring Telephone Interfaces Configuring Advanced Telephone Features 6-12 Cisco 800 Series Software Configuration Guide 78-5372-06 NoteGenerally 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. Type 0 is a primary ringing cadence—default ringing cadence for country your router is located in. Type 1 is a distinctive ring—0.8 seconds on, 0.4 seconds off, 0.8 seconds on, 4 seconds off. Type 2 is a distinctive ring—0.4 seconds on, 0.2 seconds off, 0.4 seconds on, 0.2 seconds off, 0.8 seconds on, 4 seconds off. 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. Caller Identification In addition to an analog telephone or fax machine, North American users can connect a caller ID device to the router telephone ports. This device displays the telephone numbers of incoming callers. The Cisco 800 series routers support the following caller ID devices: AT & T 2 5 AT&T 85 Plus
6-13 Cisco 800 Series Software Configuration Guide 78-5372-06 Chapter 6 Configuring Telephone Interfaces How to Use Telephones Connected to Cisco 800 Series Routers CIDCO Fans Callscreener GE Caller ID with phone GE Caller ID without phone Northwestern Bell Phone, Bell Phone Radio Shack Caller ID System 350 The Cisco 800 series routers do not support the following devices: Southwestern Bell Freedom Phone TTY System How to Use Telephones Connected to Cisco 800 Series Routers This section describes how to make a basic call and how to use the supplementary services that you ordered from your telephone service provider. Making a Basic Call 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: Step 1Dial the telephone number. 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.
Chapter 6 Configuring Telephone Interfaces How to Use Telephones Connected to Cisco 800 Series Routers 6-14 Cisco 800 Series Software Configuration Guide 78-5372-06 Step 2Send the entire set of digits to the switch by using one of the following methods: Press the pound key (#) on the telephone keypad. Wait 12 seconds without entering any digits. After 12 seconds, the router sends the set of digits to the switch. Disabling Pound Key End-of-Call Function You can disable the end-of-call function (initiated by pressing the pound key [#]) by entering the following command on the telephone keypad: **98# NoteThis 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 and 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. Using Supplementary Services This section describes how to use the following supplementary services: Call Holding and Retrieving Call Waiting Three-Way Conference Call Call Transfer Call Forwarding