Instruction manual

61200780L1-1C © 2004 ADTRAN, Inc. 40
ATLAS 800 Series System Manual Option Module Pinouts
Engineering Guidelines
Quad USSI Option Module
Pinouts 16 through 20 on the following pages describe the available interfaces for the Quad USSI Option
Module (P/N 4200261Lx).
Pinout 16. Quad USSI Module (DB-78)
Pin Signal Description Pin Signal Description Pin
Signal
Description
1
1
1
1/3 or 2/4 indicates the port on the USSI Module
RXD-A 2/4 25 DCD-A 2/4 57 DSR-A 1/3
2 RXD-B 2/4 26 DCD-B 2/4 58 CTS-B 1/3
3 RXC-A 2/4 27 DTR-A 2/4 59 CTS-A 1/3
4 RXC-B 2/4 28 DTR-B 2/4 60 CHASIS GND
5 TXD-A 2/4 29-37 Not used 61 GND
6 TXD-B 2/4 38 RTS-A 1/3 62-68 Not used
7 TXC-A 2/4 39 RTS-B 1/3 69 MOD1
8 TXC-B 2/4 40 RTS-A 2/4 70 EXT-TXC-B 1/3
9 EXT-TXC-A 2/4 41 RTS-B 2/4 71 TXC-B 1/3
10 EXT-TXC-A 2/4 43-48 Not used 72 TXC-A 1/3
11-17 Not used 49 MOD2 73 TXD-B 1/3
18 GND 50 MOD0 74 TXD-A 1/3
19 GND 51 EXT-TXC-A 1/3 75 RXC-B 1/3
20 CHASIS GND 52 DTR-B 1/3 76 RXC-A 1/3
21 CTS-A 2/4 53 DTR-A 1/3 77 RXD-B 1/3
22 CST-B 2/4 54 DCD-B 1/3 78 RXD-A 1/3
23 DSR-A 2/4 55 DCD-A 1/3
24 DSSR-B/RI 2/4 56 DSR-B/RI 1/3