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What is Dial Peer?

What is Dial Peer?

We have learned about static routing while studying Routing & Switching. Dial peers are a similar concept which means that dial-peer is a static route for your voice network. In Voice over IP (VoIP), dial peers can be categorized as either voice network dial peers or POTS (plain old telephone service). Voice over IP dial peers includes VoIP capable computers, routers, and gateways in a network. POTS dial peers include traditional telephone devices such as phone sets, cell phones, and fax machines.

Dial peers are used to configure dial plans and to identify call source and destination endpoints. They also define each call leg in the call connection. Dial peers are a critical component of VoIP.

According to this definition, there is one dial peer for each call leg (connection between two addressable call endpoints).

    You can create two primary types of dial peers:
  • Plain old telephone service (POTS) dial peer: Defines voice reachability information for any traditional voice connection (that is, any device connected to an FXS, FXO, E&M, or digital voice port)
  • Voice over IP (VoIP) dial-peer: Defines voice reachability information for any VoIP connection (that is, any device that is reachable through an IP address)

The following examples show basic configurations for POTS and VoIP dial peers:

dial-peer voice 3 pots

destination-pattern 5556123

port 2/0/1


dial-peer voice 4 voip

destination-pattern 5557000

session target ipv4:

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