An egress route defines an internal zone behavior for a call that is received from the IP network.
An egress route specifies the subset of gateways that can terminate the call and the subset of interfaces on those gateways (for example, a set of voice ports), and also any required translations.
Like an ingress route, an egress route encapsulates parameters necessary for both carrier-sensitive and prefix-based routing and other non-dial plan parameters such as codec or DTMF-relay.
When you configure an egress route on a Cisco gateway, VRC generates dial peers based on the dial peer type attribute for the egress route. If the dial peer type is:
Both - VRC translates the egress route into one inbound VoIP and one outbound POTS dial peer.
VoIP - VRC translates the egress route into one inbound VoIP dial peer.
POTS - VRC translates the egress route into one outbound POTS dial peer.