VoIP SIP Servers, Users & the Forwarding Database
VoIP SIP
6-21
iMG/RG Software Reference Manual (Voice Service)
Each user must have an associated user number, composed of a address number and, optionally, an area code
number if a complete E.164 number must be defined. Users may also have a pseudonym associated with their
numeric address (see the VOIP SIP USER CREATE command).
Note:
In any given system, there cannot be more than one user with the same area code and address. In other
words: The combination of area code and address number uniquely identifies a user within a system.
Note:
In any given system it is allowable to have two or more users with the same address but different area
code or no area code at all.
Users may inform the VoIP network about the location (IP address) where they can be contacted by registering
themselves on the location server defined in the VOIP SIP LOCATIONSERVER CREATE command. In this way
other endpoints on the VoIP network can contact each user by simply using the user address.
The domain where users are members is the domain defined in the VOIP SIP USER CREATE command. If the
DOMAIN is not defined, users will be implicitly associated with the address of the Location Server (or Proxy
Server if no location servers are defined) where they are registered.
To establish a user's registration status use the VOIP SIP USER SHOW command.
The user number used in registration messages is the complete user number: area code + address number.
6.2.2.2.1 Users and access ports
A user needs to be ‘attached’ to at least one physical telephone port in order to receive or to make calls. To
attach a user to a physical port use the VOIP SIP USER ADD command. When a user receives a call, only the
access port(s) where the user is attached are engaged by the communication. The same user may be attached to
more than one access port. In this case when a call is made to that user, all the ports to which the user is
attached will be used to signal the incoming call.
To list all physical ports where a user is attached, use the VOIP SIP USER SHOW command
Note:
Note that physical access ports don’t have their own fixed phone number. They inherit the phone
numbers from the user numbers of attached users.
More than one user may be attached to the same physical access port and therefore more than one phone num-
ber can be associated to the same physical access port.
If a user receives a call but the physical port where the user is attached is already involved in another communi-
cation (because it is used by another user), the call is rejected.
When an outgoing call is made to the VoIP network and more than one user is attached on the access port
being used to make the call, the identity of calling user is deemed to be the first user defined in the list of users
attached to that port.
To which which users are attached to a particular physical port, use the VOIP EP SHOW command.
When an access port is deleted from the system, all attached users are automatically detached from the port.
19216811.live