User`s manual

Chapter 1 - Using the AT-VP504E FXS User’s Manual (SIP/MGCP Version)
AT-VP504E FXS 13
Conferencing
Calls
A conference call
8
between three parties can be set up.
Requirements For the conference call to occur succesfully, all parties must meet the
following requirements:
 Support at least one of the PCM codecs (G.711 µ-law
and G.711 A-law) enabled on the port that is having the
conference.
 Ability to dynamically change codec during a call.
Managing a
Conference
Call
If you are on the phone with one person and want to conference with a
third one, you can do so. In the following examples, let’s assume that:
 A is the conference initiator.
 B is the person called on the first line.
 C is the person called on the second line.
X To initiate a three-way conference (A and B already connected):
1. A performs a Flash-Hook.
This will put B on hold and the second line is automatically
connected. A hears a dial tone.
2. A dials C’s number.
A and C are now connected.
3. A performs another Flash-Hook.
The call on hold (B) is reactivated. A is now conferencing with
B and C.
X A wants to transfer B to C during the conference:
1. A hangs up.
The conference is terminated. B and C are now connected.
8. Only valid for units that run the SIP signalling protocol.