Instruction manual

ATLAS 800 Series System Manual Option Module Pinouts

Engineering Guidelines

Quad Nx 56/64 Option Module

Using the provided adapter cables, each DB-78 port of the Quad Nx 56/64 Option Module

(P/N 1200184L1) supplies a V.35 Winchester-style connection (see Pinout 14). Pinout 15 shows the DB-78

interface pinout.

Pinout 14. Quad Nx 56/64 Module (V.35 Winchester)

Pin CCITT Description Pin CCITT Description

A 101 Protective ground (PG) V 115 RX clock (RC-A) to DTE

B 102 Signal ground (SG) X 115 RX clock (RC-B) to DTE

C 105 Request to send (RTS) from

DTE

P 103 Transmitted data (TD-A) from

DTE

D 106 Clear to send (CTS) to DTE S 103 Transmitted data (TD-B) from

DTE

E 107 Data set ready (DSR) to DTE Y 114 TX clock (TC-A) to DTE

F 109 Received line signal detector

(DCD) to DTE

AA 114 TX clock (TC-B) to DTE

H — Data terminal ready (DTR)

from DTE

U 113 External TX clock (ETC-A) from

DTE

J — Ring indicator (RI) W 113 External TX clock (ETC-B) from

DTE

R 104 Received data (RD-A) to DTE NN — Test mode (TM) to DTE

T 104 Received data (RD-B) to DTE

Pinout 15. Quad Nx 56/64 Module (DB-78)

Pin Signal Pin Signal

RXD-A 2/4 42 GND

2 RXD-B 2/4 43-48 Not used

3 RXC-A 2/4 49 MOD2

4 RXC-B 2/4 50 MOD0

5 TXD-A 2/4 51 EXT-TXC-A 1/3

6 TXD-B 2/4 52 DTR-B 1/3

7 TXC-A 2/4 53 DTR-A 1/3

8 TXC-B 2/4 54 DCD-B 1/3

9 EXT-TXC-A 2/4 55 DCD-A 1/3