61200780L1-1C © 2004 ADTRAN, Inc. 38ATLAS 800 Series System Manual Option Module PinoutsEngineering GuidelinesQuad Nx 56/64 Option ModuleUsing 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-78interface pinout.Pinout 14. Quad Nx 56/64 Module (V.35 Winchester)Pin CCITT Description Pin CCITT DescriptionA 101 Protective ground (PG) V 115 RX clock (RC-A) to DTEB 102 Signal ground (SG) X 115 RX clock (RC-B) to DTEC 105 Request to send (RTS) fromDTEP 103 Transmitted data (TD-A) fromDTED 106 Clear to send (CTS) to DTE S 103 Transmitted data (TD-B) fromDTEE 107 Data set ready (DSR) to DTE Y 114 TX clock (TC-A) to DTEF 109 Received line signal detector(DCD) to DTEAA 114 TX clock (TC-B) to DTEH — Data terminal ready (DTR)from DTEU 113 External TX clock (ETC-A) fromDTEJ — Ring indicator (RI) W 113 External TX clock (ETC-B) fromDTER 104 Received data (RD-A) to DTE NN — Test mode (TM) to DTET 104 Received data (RD-B) to DTEPinout 15. Quad Nx 56/64 Module (DB-78)Pin Signal Pin Signal1 1 RXD-A 2/4 42 GND2 RXD-B 2/4 43-48 Not used3 RXC-A 2/4 49 MOD24 RXC-B 2/4 50 MOD05 TXD-A 2/4 51 EXT-TXC-A 1/36 TXD-B 2/4 52 DTR-B 1/37 TXC-A 2/4 53 DTR-A 1/38 TXC-B 2/4 54 DCD-B 1/39 EXT-TXC-A 2/4 55 DCD-A 1/3
