Introducing Dial Peers
As a call is set up across the network, the existence of various parameters is checked and
negotiated. A mismatch in parameters can cause call failure. Therefore, it is important to
understand how routers interpret call legs and how call legs relate to inbound and outbound
dial peers. Successful implementation of a VoIP network relies heavily on the
proper application of dial peers, the digits they match, and the services they specify. A
network designer needs in-depth knowledge of dial-peer configuration options and their
uses. This section discusses the proper use of digit manipulation and the configuration of
dial peers.