ADTRAN 1200305L1 Dual USSI Option Module (P/N 1200754L1)

ATLAS 550 System Manual Section 2, Engineering Guidelines
61200305L1-1F © 2002 ADTRAN, Inc. 37
Dual USSI Option Module (P/N 1200754L1)
Tables 17 through 22 show pinouts for the available interfaces of the Dual USSI Option Module and the
system part numbers required for ordering.
U 113 External TX clock (ETC-A) from DTE
W 113 External TX clock (ETC-B) from DTE
NN — Test mode (TM) to DTE
Table 17. DB-78 Connector Pinout
PIN SIGNAL DESCRIPTION PIN SIGNAL DESCRIPTION
1 RXD-A 2 41 RTS-B 2
2 RXD-B 2 42 GND
3 RXC-A 2 43—48 NOT USED
4 RXC-B 2 49 MOD2
5 TXD-A 2 50 MOD0
6 TXD-B 2 51 EXT-TXC-A 1
7 TXC-A 2 52 DTR-B 1
8 TXC-B 2 53 DTR-A 1
9 EXT-TXC-A 2 54 DCD-B 1
10 EXT-TXC-B 2 55 DCD-A 1
11—17 NOT USED 56 DSR-B/RI 1
18 GND 57 DSR-A 1
19 GND 58 CTS-B 1
20 CHASIS GND 59 CTS-A 1
21 CTS-A 2 60 CHASIS GND
22 CST-B 2 61 GND
23 DSR-A 2 62—68 NOT USED
24 DSR-B/RI 2 69 MOD1
25 DCD-A 2 70 EXT-TXC-B 1
26 DCD-B 2 71 TXC-B 1
27 DTR-A 2 72 TXC-A 1
28 DTR-B 2 73 TXD-B 1
29—37 NOT USED 74 TXD-A 1
38 RTS-A 1 75 RXC-B 1
Note: 1 or 2 indicates the port on the USSI Module
Table 16. V.35 Winchester Pinout (Continued)
Pin CCITT DESCRIPTION