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APPENDIX B
ASYNCHRONOUS PORT CONNECTIONS
(CONFIGURED AS "DCE")
Pin Name Description
1
FG
Frame Ground; connected straight to synchronous
port
2
TXD
Transmit Data (to 2011); data input from asynchronous port;
Input to the 2011 power supply
3
RXD
Receive Data (from 2011); data output to asynchronous port
4
RTS
Request to Send (to 2011); input to the power supply
5
CTS
Clear to Send (from 2011); connected straight through to
synchronous port
6
DSR
Data Set Ready (from 2011); connected straight through to
synchronous port
7
SG
Signal Ground; connected straight through to
synchronous port
8
CD
Carrier Detect (from 2011); connected straight through to
synchronous port
9
+DCV Connected straight through to synchronous port
10 -DCV Connected straight through to synchronous port
20 DTR
Data Terminal Ready (to 2011); input to power supply
22 RI
Ring Indicator (from 2011); connected straight through to
synchronous port
7
APPENDIX C
SYNCHRONOUS PORT CONNECTIONS
(CONFIGURED AS "DTE")
Pin Name Description
1
FG
Frame Ground; connected straight to asynchronous
port
2
TXD
Transmit Data (from 2011); data output to synchronous port
3
RXD
Receive Data (to 2011); data input from the synchronous port
input to 2011 power supply
4
RTS
Request to Send (from 2011); 4 bit delay from asynchronous
port (2011 waits 4 bits before dropping RTS to the
synchronous port; this facilitates use in a polling
environment)
5
CTS
Clear to Send (to 2011); connected straight through to
asynchronous port
6
DSR
Data Set Ready (to 2011); connected straight through to
asynchronous port
7
SG
Signal Ground; connected straight through to
asynchronous port
8
CD
Carrier Detect (to 2011); connected straight through to
asynchronous port
9
+DCV Connected straight through to asynchronous port
10 -DCV Connected straight through to asynchronous port
15 TXC
Transmit clock (to 2011); used to synchronize data conversion
from 2011 to synchronous port
17 RXC
Receive clock (to 2011); used to synchronize data conversion
from 2011 to synchronous port
20 DTR
Data Terminal Ready (from 2011); input to power supply
22 RI
Ring Indicator (to 2011); connected straight through to
asynchronous port
8
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