Digit Removal and Prefixes
When a dial string is matched to an outbound POTS dial peer, the terminating
router will remove the left-justified digits that were explicit matches for the
destination-pattern.The leftover digits would then be forwarded to the telephony
device, like the PSTN or the PBX. Sometimes, the telephony interface will need
digits removed so they can support the existing dial plan. If this is the case, you
can use the command no digit-strip in the dial peer configuration.This command
will disable the removal of the digits, or you could use the prefix dial
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298 Chapter 9 • AVVID Dial Plans
peer command, which will prepend digits to the dial string before they are
forwarded to the interface. Be aware that these commands only work in POTS
dial peers.