Cisco GRP Bedienungsanleitung PDF herunterladen (Seite 27)

Digit Collection and Consumption

This topic describes how the router collects and consumes digits and applies them to the

dial-peer statements.

Cisco Public

IP Telephony

Digit Consumption and Forwarding

Use the no digit-strip command to disable the automatic digit-stripping function. This allows

the router to match digits and pass them to the telephony interface.

By default, when the terminating router matches a dial string to an outbound POTS dial peer,

the router strips off the left-justified digits that explicitly match the destination pattern. The

remaining digits, or

wildcard digits, are forwarded to the telephony interface, which connects

devices such as a PBX or the PSTN.

Digit stripping is the desired action in some situations. There is no need to forward digits out of

a POTS dial peer if it is pointing to a Foreign Exchange Station (FXS) port that connects a

telephone or fax machine. If digit stripping is turned off on this type of port, the user may hear

tones after answering the call because any unconsumed and unmatched digits are passed

through the voice path after the call is answered.

In other situations, where a PBX or the PSTN is connected through the POTS dial peer, digit

stripping is not desired because these devices need additional digits to further direct the call. In

these situations, the administrator must assess the number of digits that need to be forwarded

for the remote device to correctly process the call. With a VoIP dial peer, all digits are passed

across the network to the terminating voice-enabled router.

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Cisco GRP Bedienungsanleitung Seite 27