The VoIP terminal equipment is configured as described in the preceding examples, although in this case the SIP PBX VoIP domain and the internal numbers configured in the SIP PBX are used.
Automatic SIP user authentication at the router and the SIP PBX.
Using the SIP PBX domain with VoIP terminal equipment registers the user in two ways:
- Since authentication uses a valid domain defined in the router, terminal devices are registered as "local users".
- Since this domain does not correspond to the router's own VoIP domain, a simultaneous attempt is made to authenticate at the upstream SIP PBX. If the password used corresponds to the password stored in the SIP PBX for this user, then the registration on the SIP PBX will be successful.
