Nortel Networks 1000E User Manual
Connecting MG 1000T system components
Page 155 of 488
Communication Server 1000E
Installation and Configuration
Figure 37
MG 1000T Media Gateway operation
MG 1000T Media Gateway operation
This chapter contains the following procedures:
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MG 1000T Example - PRI call to IP Phone
1. Incoming ISDN D-Channel DID message to MG 1000T
2. MG 1000T Core converts to CDP call to Virtual Trunk/SS.
3. MG 1000T SS requests address for CDP DN from NRS.
4. NRS provides address of GW SS endpoint of CS0.
5. Signaling Server directs call to GW SS/CS0.
6. CS0 tells IP Phone to ring and sends Alerting to SSC.
7. IP Phone off-hook to answer; message to TPS SS/CS0.
8. CS0 sends connect to SSC using GW SS and MG 1000T SS.
9. Primary Controller cuts through media between PSTN/DSP and IP Phone
1. Incoming ISDN D-Channel DID message to MG 1000T
2. MG 1000T Core converts to CDP call to Virtual Trunk/SS.
3. MG 1000T SS requests address for CDP DN from NRS.
4. NRS provides address of GW SS endpoint of CS0.
5. Signaling Server directs call to GW SS/CS0.
6. CS0 tells IP Phone to ring and sends Alerting to SSC.
7. IP Phone off-hook to answer; message to TPS SS/CS0.
8. CS0 sends connect to SSC using GW SS and MG 1000T SS.
9. Primary Controller cuts through media between PSTN/DSP and IP Phone
and sends Connect message to PSTN.
10. Media path flows between DSP and IP Phone.
MG 1000T Signaling Server (SS)
MG 1000T Core
PSTN
1
6,9
2,3,4
5,6,8
Signaling Server
(GW SS)
CS 1000E
MG 1000T
Call Server 0
(CS0)
Signaling Server
(TPS SS)
7
6
10
IP Phone
Network Redirect
Server (NRS)
QOS IP
WAN