Configuring Voice over IP
Dial Peers
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Cisco VGD 1T3 Voice Gateway Software Configuration Guide
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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POTS dial peers associate gateway ports with destination endpoints. You need a POTS dial peer for
every port-to-endpoint association.
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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.
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 the address to which the gateway sends a call whose destination
pattern matches the one in the peer.
Table 3
VoIP Call Flow, Destination Gateway View
Event
Leg Type
Gateway receives dialed digits.
Inbound VoIP
Gateway does the following:
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Processes information (maps dialed digits, according to information stored
in dial-peer configuration tables, to a destination device).
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Gateway participates in H.323 session across network.
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Processes voice signals and sends packets over network. As appropriate,
sends call-progress and other in-band signals.
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Ends session.
Outbound POTS
plus inbound VoIP
