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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 53 Avoid Voice Channel Collision in Q.SIG
PBX
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.
NAT
Network Address Translation (NAT) replaces an IP address used inside one
network with a different IP address that is used within another network.
Peer-to-Peer
Peer-to-peer networking has a number of participants whose devices assume the
roles of both client and server. Although they are interconnected across existing
network lines and hardware, they do not require a central server to manage their
data nor do they behave strictly as clients. All participants in a peer-to-peer
network can provide data to the others (like a server) while simultaneously
receiving data from them (like a client). This type of distributed networking relies
on the computing resources of each participant to create and maintain the data
swarm. As such, a participant with limited resources can dramatically impact the
efficiency of a small peer-to-peer network for the worse; fortunately, as the
network grows in size the weakest links are rapidly overshadowed by the bigger,
faster participants.
6.1.3 Before You Begin
Before you start configuring FXO/FXS/BRI/PRI on your X2002, you should install
corresponding interface cards on your X2002.
X2002 User's Guide
Q.SIG
T1/E1
X. Channel Request (1)
Y. Channel Request (1)
Y. Channel Request (1)
Y. Channel Response (2)
Side A
Side B
Chapter 6 Server
129
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