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February 2003 2-5
1000-A2-GN22-00 2. CPX-1000 Voice Services Platform Description
Figure 2–3 illustrates this same functionality when providing
access to the PSTN via STS-1, using the STS-1 ECAC module.
Figure 2–3. CPX
Functional Diagram (STS-1 Interface)
0420
EOC
Process
Management
Process
LAN Connection To/From
Network Management System
Voice Bus
Voice Voice
Voice/
Control
Splitter
Control
STS-1 Interface
OC3 Port
ATM Lines To/From
Packet Switch
PSTN Lines To/From
Class 5 Switch
Q.931 (LAPD) Link Layer
ATM Modules
Packet Interface
CPX-1000
Shelf
STS1 Modules
CP
Modules
MP Module
Control
Call
Processing
Engine
TMC
Processing
IAD
Signalling and
Connectivity
Echo
Cancellation
and
Compression
Splitter
PSTN Interface