Dial-peers Configuration

Dial-peer wildcard symbols:

 Examples of how these wildcard symbols are applied to the destination pattern and the dial string that results when dial string 4085551234 is matched to an outbound POTS dial peer.

 Matching Inbound Dial Peers

The router uses the full digit string received in the setup request for matching against the configured dial peers. The router or gateway matches call setup element parameters in the following order:
1. The router or gateway attempts to match the called number of the call setup request with the configured incoming called-number of each dial peer.
2. If a match is not found, the router or gateway attempts to match the calling number of the call setup request with the answer-address of each dial peer.
3. If a match is not found, the router or gateway attempts to match the calling number of the call setup request to the destination-pattern of each dial peer.
4. The voice port uses the voice port number associated with the incoming call setup request to match the inbound call leg to the configured dial peer port parameter.
5. If multiple dial peers have the same port configured, the router or gateway matches the first dial peer added to the configuration.
6. If a match is not found in the previous steps, dial peer 0 is matched.

Characteristics of the Default Dial Peer

Default dial peers are used for inbound matches only. Dial peer 0 has the following characteristics:
- Any codec
- IP precedence 0
- VAD enabled
- No RSVP support
- fax-rate service
- no ivr application

Matching Outbound Dial Peers

Outbound dial-peer matching is completed on a digit-by-digit basis. Therefore, the router or gateway checks for dial-peer matches after receiving each digit and then routes the call when a full match is made.
The router or gateway uses the dial peer destination-pattern command to determine how to route the call.