Filter
Top Products
February 2003 1-7
1000-A2-GN22-00 1. Voice-over-Broadband Networking
These steps describe the network interaction that occurs when a
subscriber receives a call (Figure 1–6):
1. The Class 5 switch sends an incoming call request message to
the CPX through the PSTN (GR-303) TMC.
2. The Class 5 switch assigns a time slot.
3. The CPX sends a setup message to the IAD, verifying both
bandwidth and port availability.
4. The CPX connects the specified time slot to an IAD port.
5. The IAD initiates ringing.
6. The IAD notifies the switch via the CPX when the first ring is
complete and connects the station through to the host.
7. The Class 5 switch sends a caller ID to the IAD via the CPX.
8. When the station answers, the CPX sends a call connected
message to the Class 5 switch.
9. The Class 5 switch notifies the CPX when the call is cleared.
10. The CPX notifies the switch when the station hangs up.
Figure 1–6. Subscriber Receives a Call
6
8
10
5
6
3
8
10
7
4
6
8
10
1
2
7
9
0353
PSTN
Telephone IAD CPX-1000 Class 5 Switch