DT Etherlink IV User Manual- 101 -7.2.5 Nx64 and RS-232 ConnectorType – DB-26H (D-Sub High Density, female), 26 pins.Pin No. Signal Description Direct.V.35/36/28 X.211 M2 Mode Select Pin 2 DCE2 M1 Mode Select Pin 1 DCE3 M0 Mode Select Pin 0 DCE4 DTE/DCE Mode Select Pin DTE/DCE DCE5 LL Local Loopback (141) DCE6 TXD(A) Ta Transmit Data (A,103a) DCE14 TXD(B) Tb Transmit Data (B,103b) DCE19 RXD(A) Ra Receive Data (A,104a) DTE10 RXD(B) Rb Receive Data (B,104b) DTE24 RTS(A) Ca Request to Send (A,105a), Control (A) DCE15 RTS(B) Cb Request to Send (B,105b), Control (B) DCE26 CTS(A) Ia Clear to Send (A,106a), Indication (A) DTE17 CTS(B) Ib Clear to Send (B,106b), Indication (B) DTE18 DSR(A) Data Set Ready (A,107a) DTE9 DSR(B) Data Set Ready (B,107b) DTE16 DTR(A) Data Terminal Ready (A,108a) DCE25 DTR(B) Data Terminal Ready (B,108b) DCE8 DCD(A) Data Carrier Detect (A,109a) DTE7 DCD(B) Data Carrier Detect (B,109b) DTE22 TTC(A) Xa Terminal Transmit Clock (A,113a),DTE Signal Element Timing (A)DCE13 TTC(B) Xb Terminal Transmit Clock (B,113b),DTE Signal Element Timing (B)DCE21 TXC(A) Transmit Clock (A,114a) DTE12 TXC(B) Transmit Clock (B,114b) DTE20 RXC(A) Sa Receive Clock (A,115a),Signal Element Timing (A)DTE11 RXC(B) Sb Receive Clock (B,115b),Signal Element Timing (B)DTE23 SG G Signal Ground (102)This connector description is only correct with the Nx64 daughter board.Type – DB-26H (D-Sub High Density, female), 26 pins.
