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Matching Outbound Dial Peers

This topic describes how the router matches outbound dial peers.

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IP Telephony

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 matches outbound dial peers in the following order:

How the Router or Gateway Matches Outbound Dial Peers

Step Action

1. The router or gateway uses the dial peer destination-pattern command to determine how to

route the call.

2. The destination-pattern command routes the call in the following manner:

 On POTS dial peers, the port command forwards the call.

 On VoIP dial peers, the session target command forwards the call.

3. Use the show dialplan number string command to determine which dial peer is matched to a

specific dialed string. This command displays all matching dial peers in the order that they are

used.

Example: Matching Outbound Dial Peers

In the figure, dial peer 1 matches any digit string that has not matched other dial peers more

specifically. Dial peer 2 matches any seven-digit number in the 30 and 40 range of numbers

starting with 55501. Dial peer 3 matches any seven-digit number in the 20 range of numbers

starting with 55501. Dial peer 4 matches the specific number 5550124 only. When the number

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