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2. CPX-1000 Voice Services Platform Description 1000-A2-GN22-00
2-28 February 2003
STS-1 ECAC Card The optional STS-1 ECAC module consists of two cards
(Figure 2–14) that support one STS-1 interface containing 672 DS0s
(28 DS1s) in a single physical interface, and includes onboard echo
cancellation and compression. 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 ECAC Processing Card—controls the 28 DS1s in
an STS-1 circuit, plus onboard echo cancellation and
compression.
STS-1 Transition Card—provides the STS-1 interface via
Tx and Rx coaxial connections, plus a BITS timing interface.
Figure 2–14. STS-1 ECAC Module
S
T
A
T
T
X
A
C
T
R
X
Hot
Swap
RS-232
PROT
SWITCH
TX
RX
P
C
M
T
E
S
T
B
I
T
S
I
O
B
T
E
T
H
STS-1 ECAC Card
STS-1 Transition Card
STS-1 Ports
Status
Hot Swap
Indicator
Activity
TX
RX
PCM Test Port
BITS Port
10BaseT
Ethernet Port
RS-232C Port
Protection
Switching Port