S-Access ETHERLINK IV, Technical Description And Operations Manual, Page: 101 / 107

DT Etherlink IV User Manual
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7.2.5 Nx64 and RS-232 Connector
Type
– DB-26H (D-Sub High Density, female), 26 pins.
Pin No. Signal Description Direct.
V.35/36/28 X.21
1 M2 Mode Select Pin 2 DCE
2 M1 Mode Select Pin 1 DCE
3 M0 Mode Select Pin 0 DCE
4 DTE/DCE Mode Select Pin DTE/DCE DCE
5 LL Local Loopback (141) DCE
6 TXD(A) Ta Transmit Data (A,103a) DCE
14 TXD(B) Tb Transmit Data (B,103b) DCE
19 RXD(A) Ra Receive Data (A,104a) DTE
10 RXD(B) Rb Receive Data (B,104b) DTE
24 RTS(A) Ca Request to Send (A,105a), Control (A) DCE
15 RTS(B) Cb Request to Send (B,105b), Control (B) DCE
26 CTS(A) Ia Clear to Send (A,106a), Indication (A) DTE
17 CTS(B) Ib Clear to Send (B,106b), Indication (B) DTE
18 DSR(A) Data Set Ready (A,107a) DTE
9 DSR(B) Data Set Ready (B,107b) DTE
16 DTR(A) Data Terminal Ready (A,108a) DCE
25 DTR(B) Data Terminal Ready (B,108b) DCE
8 DCD(A) Data Carrier Detect (A,109a) DTE
7 DCD(B) Data Carrier Detect (B,109b) DTE
22 TTC(A) Xa Terminal Transmit Clock (A,113a),
DTE Signal Element Timing (A) DCE
13 TTC(B) Xb Terminal Transmit Clock (B,113b),
DTE Signal Element Timing (B) DCE
21 TXC(A) Transmit Clock (A,114a) DTE
12 TXC(B) Transmit Clock (B,114b) DTE
20 RXC(A) Sa Receive Clock (A,115a),
Signal Element Timing (A) DTE
11 RXC(B) Sb Receive Clock (B,115b),
Signal Element Timing (B) DTE
23 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.