Instruction manual

A-2. MAIN LINK AND DATA CHANNEL INTERFACES
Interface Connectors The main link and data channel interface connectors are 15-pin D-type female
connectors.
NOTE
The following tables also present the direction of the signals
in the main link and the data channel connectors.
X.21 Pin Allocations When the selected interface is X.21, the connector is wired in accordance with
ITU-T Rec. X.21. Connector pin allocations are listed in Table A-1.
Table A-1. Main Link Interface Connector, X.21 Interface
DB-15
Interface
Connector Pin
Direction
Function
LINK DATA
1 – – Frame ground (shield)
2 OUT IN TX data - A wire
3 OUT N.C RTS - A wire (main link only)
4 IN OUT RX data - A wire
5 N.C OUT
Carrier detect - A wire (data channel
only)
6 IN OUT Signal timing - A wire
7 – – Not connected
8 – – Signal ground
9 OUT IN TX data - B wire
10 OUT N.C RTS - B wire (main link only)
11 IN OUT RX data - B wire
12 N.C OUT
Carrier detect - B wire (data channel
only)
13 IN OUT Signal timing - B wire
14 – – Not connected
15 – – Not connected
APPENDIX A - CONNECTION DATA
A-2 DV-MUX3 Installation and Operation Manual