Allied Telesis AT-iMG634 - R2 Guía de usuario Pagina 582

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VoIP SIP VoIP SIP Servers, Users & the Forwarding Data-
iMG/RG Software Reference Manual (Voice Service)
6-18
FIGURE 6-2 Phone --> iMG(A) --> SIP IP Phone
6.2.2 VoIP SIP Servers, Users & the Forwarding Database
The VoIP SIP subsystem on iMG residential gateways is based on the concept of SIP servers, local users, call for-
warding rules and access ports.
The following section describes SIP servers, local users and forwarding database.
SIP servers are servers where local users register themselves (Location Servers) and where calls are routed
(Proxy Servers) when an outgoing call is going to be set up.
Users are entities uniquely identified in the system by a name with an associated phone number. The User's
phone number represents the user's address on the local system.
Forwarding rules are local call routing rules used to forward an incoming call from a local user to a remote
system or to a remote user. Forwarding rules are also used for locally originated calls when the called party
SIP IP Phone
SIP Server
Unit
Analog
(or Digital Phone)
VOIP IP
Network
A
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