user manual

3-13
Cisco ONS 15454 SDH Reference Manual, R5.0
April 2008
Chapter 3 Electrical Cards
3.6 STM1E-12 Card
3.6 STM1E-12 Card
The 12-port ONS 15454 SDH STM1E-12 card provides 12 ITU-compliant, G.703 STM-1 ports per card.
Ports 9 to 12 can each be either E-4 or STM-1. Each interface operates at 155.52 Mbps for STM-1 or
139.264 Mbps for E-4 over a 75-ohm coaxial cable (with the FMEC STM1E 1:1 card). In E-4 mode,
framed or unframed signal operation is possible. 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 on 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 non-protection and 1:1 protection. In both cases, the FMEC STM1E 1:1 card
is used. Up to two non-protected active STM1E cards use the same FMEC STM1E 1:1 card, and one
active plus one protect STM1E cards use the same FMEC STM1E 1:1 card.
OCEAN
ASIC
MUX
FPGA
134807
B
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12
Line
Interface
Units
Ports 1-8 (STM1E only)
Ports 9-12 (STM1E only)
FAIL
ACT/STBY
SF
STM1E
12