NEC UNIVERGE SV9100 Manual page 122

122
In this sequence, at first, SIP1 is talking with SIP2.
If SIP1 pushes the conference key during conversation, the call is held.
After that, SIP1 makes a call to another terminal (SIP3) that SIP1 wants to join the conference.
After SIP3 answers the call, SIP1 pushes the conference key again, and then the call between SIP1 and
SIP2 is retrieved.
At this time, SIP1 combines together the SIP2 voice and SIP3 voice.
And SIP1 then sends the voice of SIP1 and SIP2 to SIP3, and the voice of SIP1 and SIP3 to SIP2.
NAT Mode for SIP Extensions
Previously standard SIP extensions could be registered as a device when located in the Intranet
network to make outbound or receive inbound calls. This feature provides support for standard SIP
extension registration when the phone is over the Internet at a remote location. In the case of a
standard SIP extension with video, a video conversation can be made.