Before You Begin - ZyXEL Communications X6004 User Manual

Chapter 6 Server
Side A/B Settings in Q.SIG
When using Q.SIG, the side A and B settings are used to avoid voice channel collision. See an
example in the following figure. In E1, there are 30 voice channels. X6004 (X) requests to use
channel 1 for an outgoing call and waits for Y's response. Almost at the same time, X receives
Y's request to also use channel 1 for an outgoing call. If you configure X to use the side A, X
will ignore Y's channel request. But if you use the side B setting, X will response the Y with
the recommendation for another channel like channel 2.
Figure 111 Avoid Voice Channel Collision in Q.SIG
RTP
When you make a VoIP call using SIP, the RTP (Real Time Transport Protocol) is used to
handle voice data transfer. See RFC 1889 for details on RTP.

6.1.3 Before You Begin

Before you start configuring FXO/FXS/BRI/PRI on your X6004, you should install
corresponding interface cards on your X6004.
6.2 The IP-PBX Server Global Screen
Use this screen to set up the SIP server settings on the X6004. SIP clients, such as the IP
phones on your network, must enter this information when registering with the X6004. To
access this screen, click Configuration > PBX > Server Configuration > Server.
Figure 112 Configuration > PBX > Server Configuration > Server > Global
118
Q.SIG
T1/E1
PBX
X. Channel Request (1)
Y. Channel Request (1)
Y. Channel Request (1)
Y. Channel Response (2)
Side A
Side B
X6004 User's Guide