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Cisco ONS 15454 SDH Reference Manual, R5.0
April 2008
Chapter 3 Electrical Cards
3.9.1 FMEC-DS1/E1 Card Connector Pinout
You can install the FMEC-DS1/E1 card in any EFCA slot from Slot 18 to 22 or Slot 25 to 29 on the
ONS 15454 SDH. Each FMEC-DS1/E1 card interface features E1-level inputs and outputs supporting
cable losses of up to 6 dB at 1024 kHz.
3.9.1 FMEC-DS1/E1 Card Connector Pinout
Use Table 3-8 to make the connection from the E-1 37-pin DB connector for Ports 1 to 7 to the external
balanced 120-ohm E-1 interfaces.
Use Table 3-9 to make the connection from the E-1 37-pin DB connector for Ports 8 to 14 to the external
balanced 120-ohm E-1 interfaces.
Table 3-8 E-1 Interface Pinouts on Ports 1 to 7
Pin No. Signal Name Pin No. Signal Name
1 GND 20 RX 7 P
2 TX 7 P 21 RX 7 N
3 TX 7 N 22 GND
4 TX 6 P 23 RX 6 P
5 TX 6 N 24 RX 6 N
6 GND 25 RX 5 P
7 TX 5 P 26 RX 5 N
8 TX 5 N 27 GND
9 TX 4 P 28 RX 4 P
10 TX 4 N 29 RX 4 N
11 GND 30 RX 3 P
12 TX 3 P 31 RX 3 N
13 TX 3 N 32 GND
14 TX 2 P 33 RX 2 P
15 TX 2 N 34 RX 2 N
16 GND 35 RX 1 P
17 TX 1 P 36 RX 1 N
18 TX 1 N 37 GND
19 GND — —
Table 3-9 E-1 Interface Pinouts on Ports 8 to 14
Pin No. Signal Name Pin No. Signal Name
1 GND 20 RX 14 P
2 TX 14 P 21 RX 14 N
3 TX 14 N 22 GND
4 TX 13 P 23 RX 13 P