Understand Matching Inbound/Outbound Dial Peers on IOS Platforms

Publisher

Cisco Systems

URL

https://www.cisco.com/c/en/us/support/docs/voice/call-routing-dial-plans/14074-in-dial-peer-match.html

Published

2026-08-18

Updated

unknown

Accessed

2026-10-02

HTTP status

200

License

Cisco website terms of use; no-redistribution; short excerpts and locators only

Source notes citing this source

• Default dial peer 0 advertises any codec and has voice activity detection (VAD) enabled. in context
• Cisco's worked example resolves an inbound VoIP call matching dial peer 0 by adding an incoming called-number pattern to an explicitly configured inbound VoIP dial peer, so that capabilities such as cisco-rtp DTMF relay are negotiated. in context
• If no inbound dial peer matches on incoming called-number, the gateway next tries to match the calling number (ANI) against the answer-address configured on dial peers. in context
• For inbound dial-peer matching on Cisco IOS voice gateways, the router first tries to match the called number (DNIS) of the call setup against the incoming called-number configured on each dial peer. in context
• If neither incoming called-number nor answer-address produces an inbound match, the gateway tries to match the calling number (ANI) against the destination-pattern configured on dial peers. in context
• At each inbound matching step, if several dial peers match, the one with the longest explicit match is chosen. in context
• As a later inbound criterion the gateway matches the dial peer port against the voice port of the incoming call, and if several dial peers have the same port the dial peer first added to the configuration is matched. in context
• An outbound-oriented dial peer can be selected as the inbound dial peer when no URI or called-number criterion matches but its destination-pattern matches the caller's ANI, so a broad destination-pattern such as .T can capture inbound calls. inferred in context
• For outbound dial-peer matching on a DID call the device uses the entire incoming dial string, while for non-DID calls outbound matching is done digit by digit. in context
• Cisco recommends using incoming called-number for inbound dial-peer matching because call setups always include DNIS information. in context
• show call active voice brief lists active calls with their associated dial peers, and show call active voice gives detailed negotiated parameters such as DTMF relay, VAD and codec. in context

Cite this source record

APA

WarmTransfer. (2026, August 18). Understand Matching Inbound/Outbound Dial Peers on IOS Platforms. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-technote-14074-in-out-dial-peer-match

BibTeX

@misc{warmtransfer-cisco-technote-14074-in-out-dial-peer-match,
  title  = {Understand Matching Inbound/Outbound Dial Peers on IOS Platforms},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-technote-14074-in-out-dial-peer-match},
  note   = {Cisco Systems, accessed 2026-10-02}
}