Specifications
Optimux-XLT1 Installation and Operation Manual  Appendix A Interface Specification 
  HS DTE Connector  A-3 
A.3  HS DTE Connector 
The HS DTE module connectors are of 26-pin SCSI type. Up to four connectors 
can be mounted on each module. The desired physical connector (V.35, RS-530 
or X.21), is achieved using an adapter cable which is supplied with the product. 
The pin assignment of the HS DTE connector is depicted in Table A-4. 
Table A-4. HS DTE Connector Pin Assignment 
Pin Designation Function  Direction 
1 GND    – 
26 –  Unused  – 
2 TD-  Transmit data  Input 
14 
TD+ 
Transmit data  Input 
3 RD-  Receive data  Output 
16 
RD+ 
Receive data  Output 
4  RTS-  Request to send  Input 
19 
RTS+ 
Request to send  Input 
5  CTS-  Clear to send  Output 
13 
CTS+ 
Clear to send  Output 
6  DSR-  Data set read  Output 
22 
DSR+ 
Data set read  Output 
8  DCD-  Data carrier detect  Output 
10 
DCD+ 
Data carrier detect  Output 
17 RXC-  Receive clock  Output 
9 
RXC+ 
Receive clock  Output 
24 EXTC-  External clock  Input 
11 
EXTC+ 
External clock  Input 
15 TXC-  Transmit clock  Output 
12 
TXC+ 
Transmit clock  Output 
20  DTR-  Data terminal ready  Input 
23 
DTR+ 
Data terminal ready  Input 
18 –  Unused  – 
21 –  Unused  – 
25 –  Unused  – 
7 GND    – 
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