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Menus Reference Manual: Edit Remote Site - Connection Set-Up – ISDN Call Set-Up Menu
8 - Callback
The Callback option when set to enabled causes this router to refuse an incoming ISDN call for this remote site profile
and then initiate an outgoing ISDN call to this remote site. Once a match of an incoming ISDN call is made to an
existing remote site profile, the matching remote site profile is checked to determine whether the incoming call is
answered or refused and a callback ISDN call initiated.
Callback to this remote site may also be triggerred by a call from another source, such as a voice phone. In this case, the
number of the voice phone used to trigger the callback would be entered in the Wildcard option (4).
The Callback option may be used to provide a single point of ISDN billing. By allowing only one of the routers to
establish ISDN calls, the ISDN charges may be centralized in one location.
The CallerID option when enabled will take precedence on determining whether an incoming call is ignored or
answered. When calling back this remote site, both the ISDN number and the alternate ISDN number will be tried.
Default:
[disabled].
Considerations:
For this feature to operate, the ISDN service provider must supply the caller's number. Check with your ISDN
service provider to see whether this service is available. For callback from a P1700 to a remote site router with only a
single BRI to operate properly, the P1700 must either have a hunt group number that the remote site router can call
or the ISDN links must be set up in groups of two. If this is not done, the remote site router can call in to the P1700
on one of up to 4 ISDN numbers; the callback will be made from the first available ISDN link. This may not be the
number that the remote router uses as the primary or alternate ISDN, which means that the call will be rejected.
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