User's Manual

Overview 15
Copyright © 2003, Nortel Networks MCP SIP Application Module Basics
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URL addresses specifying an appropriate gateway. It supports the use
of digit translation and digit manipulation.
A route list is assigned a single COS. The route list provides the
following additional options that can restrict incoming sessions from
using the domain’s telephony resources:
• allow/block all incoming sessions from other domains
• allow/block all incoming sessions from other subdomains
• redirect session to the originator’s domain. This option can be used
to redirect an incoming request from another domain that is routing
to a restricted route list.
Route lists consist of
• private telephony routes, which are used for private telephony-style
digit dial plans
• gateway routes, which provide access to the gateways
• SIP telephony routes, which point to other SIP Application Modules,
and SIP domains and subdomains for interdomain routing using
telephony-style dial plans
SIP Aliases
Alias URLs can be used to refer to a SIP client in the network. For
example, a user “sip: [e-mail]” can also be referred to by
an alias of “sip:[e-mail]”.
If an incoming request specifies the “sip:[e-mail]” alias in
a Request-URI, the alias takes precedence over gateway routing
translations, and routing information pertaining to userA is retrieved. If
an alias of “sip:[e-mail]” is not configured, then gateway
routing translations are performed to find out if a terminating gateway
exists.
Multiple Route Termination
If a single SIP user is registered at more than one device (PSTN or
SIP), forking is used to terminate a session simultaneously or
sequentially to multiple devices.
The SIP Application Module interfaces with the SIP database to
determine the user routing preference, the routes available, and routing
options for a particular user. The user defines these options through the
SIP Personal Agent. For additional information on the SIP Personal
Agent, refer to the on-product help and SIP Personal Agent Getting
Started Guide.