Cisco 700 series, Installation Manual

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ISDN and Analog Telephone Devices 4-7
Note
To use DTMF commands from the telephone keypad, the set local access command
must be set to on .
Note
In this section, the term on-hook means to hang up the telephone.
Call Waiting
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