dial-peer 0 is a default dial-peer for inbound call when no other specific dial-peer is matched.
There are several parameters used to match a inbound call within dial-peer configuration mode. They are matched in the following order.
- incoming-called number (DNIS:Dialed Number Identification Service)
- answer-address (ANI:Automatic Number Identification)
- destination-pattern (ANI)
- port (For inbound POTS call only)
- dial-peer 0
Dial-peer 0 will be matched automatically if all the above 4 parameters are not exist.
Once dial-peer is matched the following “default condition” also applied and not tunable.
- accept any voice codec
- NO DTMF relay
- Voice Packets marked as IP precedence 0
- VAD enabled
- NO RSVP support
- Fax-rate voice: The router will limit the bandwidth available to fax signals to the
maximum allowed by the VoIP codec. This could devastate fax calls if you are using
a low-bandwidth compressed codec.
- No application support: Dial peer 0 cannot refer calls to outside applications, such
as an Interactive Voice Response (IVR) system.
- NO DID support
As dial-peer bring some bad effect for voice call, configure your dial-peer to avoid it as possible as you can.