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February 2003 2-25
1000-A2-GN22-00 2. CPX-1000 Voice Services Platform Description
STS-1 Module The STS-1 module consists of two cards (Figure 2–14) that supports
one STS-1 interface containing 672 DS0s (28 DS1s) in a single
physical interface. This interface may be connected directly to the
Class 5 Switch, or it may be routed through an external STS-1 mux
before being connected to the switch.
STS-1 Processing Card—processor that controls the 28
DS1s within an STS-1 circuit.
STS-1 Transition Card—provides the STS-1 interface via
Tx and Rx coaxial connections, plus a BITS timing interface.
The STS-1 card features on-board echo cancellation. If compression
is required, an Echo Cancellation and Compression card may be
added. Debug interfaces are also provided.
The STS-1 module increases the traffic capacity of the CPX over
what can otherwise be obtained by using T1 modules. When
configured for redundancy (1 + 1), these modules occupy shelf
slots 11-16 in pairs.
Table 2–6. 12-port T1 ECAC Module Controls, Indicators, and Ports
Cards Controls, Indicators, and Ports Function
12-port T1 ECAC STAT Lights green when processor is active
ACT Lights green if module is in active
group
T1 Port Indicators (12) Lights red if carrier fails, or no carrier
is present on the indicated port
Hot Swap
12-port T1 Transition
RJ-21X PORT for 12 T1s
For T1 cable to Class 5 switch
10 BT ETH RJ-48C port Unused
BITS RJ-48C port For onsite BITS clocking source
PCM TEST RJ-48C port Unused
RS-232
Unused