Dial Peers - Cisco AS5350 - Universal Access Server Configuration Manual

VoIP Basics

Dial Peers

Each kind of call leg into or out of a gateway—inbound POTS, outbound VoIP, inbound VoIP, and
outbound POTS—must have assigned to it a set of allowable call scenarios, called dial peers.
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A dial peer is, essentially, a single static route within a routing table. A collection of dial peers
constitutes a dial plan.
Syntax
A POTS dial peer has the following syntax:
dial-peer voice tag pots
destination-pattern number
port port#
other configurable options
where tag is a numeric value of local significance only, number is the full E.164 phone number of the
associated endpoint, and port# is the voice port in the gateway through which the call is transmitted once
a destination pattern is matched.
A VoIP dial peer has the following syntax:
dial-peer voip tag voip
destination-pattern number
session target data address
other configurable options
where tag is a numeric value of local significance only, number is the full E.164 phone number of the
associated endpoint, and data address is where the gateway sends a call whose destination pattern
matches the one in the peer.
Matching Rules
A gateway redirects an incoming call along the most appropriate outbound leg. It selects the most
appropriate leg by first finding the POTS or VoIP (depending on call direction) dial peer whose
destination pattern matches the call's dialed digits. For outbound VoIP legs, it chooses the longest
matching dial peer. If more than one such match exists, it checks whether preferences have been assigned
those peers and selects the peer with the lowest preference level.
Cisco AS5350 and Cisco AS5400 Universal Gateway Software Configuration Guide
6-4
POTS dial peers associate gateway ports with destination endpoints. You need a POTS dial peer for
every port-to-endpoint association.
VoIP dial peers associate destination phone numbers with IP addresses or other means to send
packets to that destination. You need a VoIP dial peer for every set of destination endpoints.
Chapter 6 Configuring Voice over IP
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