Datasheet

3-13
Cisco ONS 15454 SDH Reference Manual, R7.0
October 2008
Chapter 3 Electrical Cards
3.6.1 STM 1E-12 Card Functionality
The 12-port ONS 15454 SDH STM1E-12 card provides 12 ITU-compliant, G.703 STM-1 ports per card.
Each interface operates at 155.52 mbps for STM-1 over a 75-ohm coaxial cable (with the FMEC STM1E
1:1 card). The STM1E-12 card operates as a working or protect card in 1:1 protection schemes.
Figure 3-5 shows the STM1E-12 faceplate and block diagram.
Figure 3-5 STM1E-12 Faceplate and Block Diagram
3.6.1 STM 1E-12 Card Functionality
You can install the STM1E-12 card in Slots 1 to 4 and 14 to 17 of the ONS 15454 SDH. Each STM1E-12
port features ITU-T G.703 compliant outputs supporting cable losses of up to 12.7 dB at 78 MHz. The
STM1E-12 card supports no protection and 1:1 protection. In both cases, the FMEC STM1E 1:1 card is
used. Up to two unprotected active STM1E-12 cards use the same FMEC STM1E 1:1 card, and one
active STM1E-12 card and one protect STM1E-12 card use the same FMEC STM1E 1:1 card.
OCEAN
ASIC
MUX
FPGA
134807
B
a
c
k
p
l
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e
12
Line
Interface
Units
Ports 1-8 (STM1E only)
Ports 9-12 (STM1E only)
FAIL
ACT/STBY
SF
STM1E
12