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This chapter describes how to connect an ISDN or analog telephone to a Cisco 700 series router and how to configure the router to support that telephone. An ISDN telephone can be connected to the ISDN S/T port of any Cisco 700 series router. An analog telephone can be connected to a Cisco 765, Cisco 766, Cisco 775, or Cisco 776 router basic telephone service port (also known as "plain old telephone service" or "POTS" port).
You can connect an ISDN telephone to any Cisco 700 series router with an S/T port. The ISDN telephone communicates over the same ISDN line the router uses to send and receive data. ISDN telephones are available in two basic models, self-powered (described in the section "Connecting a Self-Powered Digital Telephone") and with an independent power supply (described in the section "Connecting a Digital Telephone with an External Power Supply").
 | Warning This equipment contains a ring signal generator (ringer), which is a source of hazardous voltage. Do not touch the RJ-11 (phone) port wires (conductors), the conductors of a cable connected to the RJ-11 port, or the associated circuit-board when the ringer is active. The ringer is activated (indicated by a clicking sound) by an incoming call. |
 | Caution Do not connect the router telephone ports to the telephone wall jack. These ports are not meant for direct connection to a public network. This connection can damage your router. |
You can connect an ISDN telephone to the Cisco 761, Cisco 765, Cisco 771, or Cisco 775 only through an external NT1 connector. If you are connecting an ISDN telephone directly to the Cisco 762, Cisco 766, Cisco 772, or Cisco 776, connect the ISDN telephone cable (provided with the ISDN telephone) to the RJ-45 port labeled ISDN S/T on the rear panel of the router. Cable the ISDN wall jack to the port labeled ISDN U. (See Figure 4-1.)
Refer to the instructions provided by the manufacturer of the telephone.
This section describes how to connect an ISDN telephone that requires an external power supply to the router. Depending upon the ISDN telephone model and power supply model you use, the procedure to connect the ISDN telephone and power supply might differ slightly. This example procedure describes how to connect an AT&T ISDN telephone (model ISDN 8510T) and an AT&T external power supply (model MSP-1). Also refer to the instructions provided by the manufacturer of the telephone.
You must provide the following equipment:
Take the following steps to connect the ISDN telephone and external power supply. This procedure assumes you have connected the ISDN U port to the ISDN wall jack (see Figure 4-1).
Step 1 Connect an RJ-45-to-RJ-45 cable (included) from the ISDN S/T port (on the rear panel of the router) to the port labeled LINE on the ISDN telephone power supply. (See Figure 4-2.)
Step 2 Connect the ISDN telephone RJ-45 cable to the port labeled PHONE on the ISDN telephone power supply. (See Figure 4-2.)
Step 3 Connect the telephone power supply to the power outlet.
You can now use the ISDN telephone on the same ISDN line as the router.
If you are using a Cisco 765, Cisco 766, Cisco 775, or Cisco 776, you can connect one or two analog devices, such as a telephone, fax machine, or modem, directly to the router. The analog device is connected to basic telephone services through the same ISDN line the router uses.
Also, if you are outside of North America, you might need to provide an adapter cable for the type of connector that your device uses (the telephone uses an RJ-11 connector.)
To connect the analog device to the router, connect the telephone cable (provided with the analog device) to the RJ-11 port (labeled with a telephone icon) on the rear panel of the router, as shown in Figure 4-3.
Cisco 700 series routers do not support Open Service Intervals or Battery Reversal.
Call waiting sounds a tone if you are already on a call and there is a second incoming call. Your BRI line must be provisioned for the additional call offerings (ACOs) call hold and call retrieve to use call waiting. (For more information on ACOs, refer to the appendix "Provisioning the ISDN BRI Line.") One analog telephone interface can support two calls; therefore, only one call at a time can be waiting.
To retrieve the new call, perform a flash or short on-hook (quickly press the telephone receiver button once) to place the call in progress on hold and answer the new call. If your analog telephone offers the option, you can press the Flash key instead of the telephone receiver button to put the call on hold and answer the new call.
You can toggle between calls on the same analog telephone interface by performing the short on-hook or by using the Flash key.
If you terminate one call and return the receiver to the hook, the waiting call remains active. The telephone rings, and when you pick up the receiver, you are connected to the waiting call.
The set callwaiting command enables call waiting for the analog port specified. Following is an example of the set callwaiting command that turns on the call waiting feature on the phone1 port:
766> set callwaiting interface phone1 on
The set callwaiting command disables call waiting for the analog port specified. Following is an example of the set callwaiting command that turns off the call waiting feature on the phone1 port:
766> set callwaiting interface phone1 off
**99#
When the voice call is completed, call waiting is restored.
Call hold and retrieve is the ability to place a caller on hold, make a second call, and return to the first call. (Some countries that use the NET3 switch do not support ISDN provisioning for call hold and call retrieve.)
To place a call on hold:
Step 1 Perform a short on-hook (quickly press the telephone receiver button once) to get a dial tone.
If your analog telephone device offers the option, you can press the Flash key instead of the short on-hook to put the call on hold.
Step 2 Dial the hold access number, **95#.
Step 3 Dial the second call.
To retrieve the call placed on hold, perform the short on-hook or press the Flash key again.
If you have a call on hold and you hang up, the telephone rings, indicating a call is on hold. Picking up the telephone receiver connects you to the caller on hold.
Call transfer is the ability to transfer an active call to another number. (Some countries that use the NET3 switch do not support ISDN provisioning for call transfer.)
Take the following steps to transfer an active incoming call to another telephone number:
Step 1 Perform a short on-hook (quickly press the telephone receiver button once) to get a dial tone.
If your analog telephone device offers the option, you can press the Flash key instead of the short on-hook to put the call on hold.
You can also return to the original call by performing another short on-hook.
Step 2 Dial the number to which the call is to be transferred.
Step 3 Hang up the receiver. The call is transferred.
If the transfer fails, the caller remains on hold, and the telephone rings to alert you to the call on hold.
Three-way call conferencing adds another party to an active call. (Some countries that use the NET3 switch do not support ISDN provisioning for three-way call conferencing.) Up to three people can be connected using three-way conferencing. (It is a known limitation that no more than two Cisco 700 series routers can be connected.)
Take the following steps to add a third party to an active call:
Step 1 Perform a short on-hook (quickly press the telephone receiver button once) to get a dial tone.
If your analog telephone device offers the option, you can press the Flash key instead of the short on-hook to put the call on hold.
Step 2 Dial the second call.
Step 3 When the second call is answered, perform a short on-hook to connect the original caller.
To make an analog telephone call over INS ISDN lines in Japan from a telephone connected to Cisco 700 series routers, take the following steps:
Step 1 Enter each individual number (called a dialing digit) of the telephone number on the telephone keypad.
You must enter each successive dialing digit within 6 seconds of entering the previous digit. If you wait longer than 6 seconds, an incomplete set of dialing digits is sent to the switch.
Step 2 Send the entire set of dialing digits to the switch in one of the following ways:
To disable the end-of-call function, use the following DTMF command:
**98#
After entering the **98# command, wait for the dial tone and enter the desired dialing digits, including the pound (#) key. The call is sent 6 seconds after the last dialing digit is entered. When the call is terminated, the end-of-call function is restored for the next call.
Depending on the ISDN service provider, certain internal tones, such as dial, ring back, and busy tones, might not be provided by the telephone switch (the device on the other end of the ISDN line). If this is the case with the ISDN line you are using, you can configure Cisco 700 series routers to provide just the dial tone or all tones. This command applies only to NET3 router software and to 1TR6 router software.
The set internaltones command provides just the dial tone or all internal tones. By default, the router provides all internal tones.
The following is an example of a set internaltones command that enables the dial tone only:
766> set internaltones dialtone
Call Forwarding supplementary service has been added to software Release 4.0(2) and higher for Sweden and Finland (NET3). The Call Forwarding types supported are as follows:
Call Forwarding Unconditional (CFU)---Enables the network to redirect all incoming calls to another party, regardless of the status of the user.
Call Forwarding Busy (CFB)---Enables the network to redirect to another party calls that meet a busy condition.
In all types of Call Forwarding, the user's ability to originate calls is unaffected by the Call Forwarding supplementary service.
The feature numbers for Call Forwarding are provided here for convenience, but they could be different in your area, depending upon the local telephone service provider.
To activate Call Forwarding:
Step 1 Take the phone off hook.
Step 2 Dial *feature number* phone number to be forwarded to #.
Step 3 Hang up. You might hear a confirmation signal from the network before you hang up.
To deactivate Call Forwarding:
Step 1 Take the phone off hook.
Step 2 Dial #feature number#.
If the wrong feature number is entered, you might hear a signal indicating the wrong feature number was entered or the activation or deactivation failed.
Activation: *21*forwarded-to number#
Deactivation: #21#
Activation: *61*forwarded-to number#
Deactivation: #61#
Activation: *67*forwarded-to number#
Deactivation: #67#
The switch type NET3 supports these features where the country group must be set for Sweden and Finland.
There is no equivalent command-line command to activate or deactivate Call Forwarding. The phone number to which calls are redirected is not displayed.
All types of Call Forwarding supplementary services must be provisioned on the ISDN line for the service to be available.
If your router has been preconfigured, there is nothing more to do except power on the router.
If you are using the Cisco 700 Fast Step Setup application to configure your router, it includes steps to configure the digital and analog devices attached to your router. Cisco 700 Fast Step applications are on the CD-ROM inside the Cisco 700 Quick Reference Guide.
If you are an experienced user and want to use the command-line interface (CLI) to configure the digital and analog devices or have been instructed to do so, refer to the Cisco 700 Series Command Reference for a list of the commands and some configuration examples. The Cisco 700 Series Command Reference is on the Documentation CD.
Posted: Tue Feb 23 14:21:27 PST 1999
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