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February 2003 2-21
1000-A2-GN22-00 2. CPX-1000 Voice Services Platform Description
Figure 2–9. T1 Module Path Protection Switching
Figure 2–10. T1 Port Failure Protection
Octal T1 Module The Octal T1 module supports eight T1 interfaces to the Class 5
switch.
The T1 module consists of two separate cards (Figure 2–11):
0228
T1 Modules
(all operational)
IG #1
IG #2
A. Full Capacity
(all TDM modules operational)
B. Diminished Capacity
(one TDM module failed -
TDM interface must still be able
to handle busy hour call volume)
T1 Modules
(single failure)
IG #1
IG #2
Primary
Secondary
Primary
Secondary
0271
T1 Modules
IG #1
IG #2