Nortel 1000E Installation And Configuration Manual page 155

Figure 37
MG 1000T Media Gateway operation
MG 1000T Signaling Server (SS)
MG 1000T Core
PSTN
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
and sends Connect message to PSTN.
10. Media path flows between DSP and IP Phone.
Connecting MG 1000T system components
2,3,4
1
6,9
MG 1000T
This chapter contains the following procedures:
• Procedure 34: "Connecting the MG 1000T Core to an MG 1000T
Expansion" on
• Procedure 35: "Connecting an MG 1000T Core to the ELAN subnet"
on page 161.
• Procedure 36: "Connecting a Signaling Server to the ELAN subnet"
on page 162.
• Procedure 37: "Connecting a Signaling Server to the TLAN subnet"
on page 163.
• Procedure 38: "Inserting a Shielded 50-pin to Serial/ELAN/TLAN
adapter on to a Media Card" on
Communication Server 1000E
5,6,8
Signaling Server
CS 1000E
page 158.
page
Page 155 of 488
Network Redirect
Server (NRS)
(GW SS)
Call Server 0
(CS0)
Signaling Server
(TPS SS)
7
6
10
164.
Installation and Configuration
QOS IP
WAN
IP Phone