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Configure Dial Peers
Configure Dial Peers
The key point to understanding how Voice over IP functions is to understand dial peers. Each dial peer defines the characteristics associated with a call leg, as shown in Figure 6 and Figure 7. A call leg is a discrete segment of a call connection that lies between two points in the connection. All the call legs for a particular connection have the same connection ID.
There are two different kinds of dial peers:
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Four call legs make comprise and
Figure 6 | Dial Peer Call Legs from the Perspective of the Source Router | ||||||||||
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| Source router |
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Call leg for POTS | Call leg for VoIP | |
dial peer 1 | ||
dial peer 2 | ||
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10353
Figure 7
Destination
Dial Peer Call Legs from the Perspective of the Destination Router
Call leg for VoIP | Call leg for POTS | |
dial peer 3 | ||
dial peer 4 | ||
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IP cloud |
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Destination router
Source | 10354 |
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Inbound versus Outbound Dial Peers
Dial peers are used for both inbound and outbound call legs. It is important to remember that these terms are defined from the router’s perspective. An inbound call leg originates outside the router. An outbound call leg originates from the router.
For inbound call legs, a dial peer might be associated to the calling number or the port designation. Outbound call legs always have a dial peer associated with them. The destination pattern is used to identify the outbound dial peer. The call is associated with the outbound dial peer at setup time.