Specifications

Excalibur Multirate DAP Installation and Operation
3-4
Table 3-1. RS-232 DTE Connector, Pin/Signal Assignments
Pin No. CCITT V.24
Symbol
RS-232
Symbol
Input/
Output Function
1 101 – – Not used.
2 103 BA Input Transmit Data. Serial binary signals from
DTE.
3 104 BB Output Receive Data. Serial binary signals to DTE.
4 105 CA Input Request-to-Send (RTS). Indicates DTE is
ready to send data.
5 106 CB Output Clear-to-Send (CTS). Indicates DAP is ready
to transmit data.
6 107 CC Output Data Set Ready (DSR). Indicates DAP
operating normally, ready to transmit and
receive data.
7 102 AB – Signal ground. Common ground reference for
all circuits.
8 109 CF Output Data Carrier Detect (DCD). Indicates DAP is
receiving a carrier signal from the remote
DAP.
9 – – Output Positive Test Voltage (+12 V).
10 – – Output Negative Test Voltage (-12 V).
11 – – – Not used.
12A* 122 SCF Output Secondary Channel DCD. Indicates that
secondary channel signals are being received.
Used with central site units.
12B* – – Input Digital Power Failure input. Used with
remote site units.
13 121 SCB Output Secondary Channel CTS.
* The signal assigned to this pin is selected through the DAP's configuration menu and/or its jumper settings.