User Guide

ISDN Router Manual V.1.1
85
APPENDIX
APPENDIX 1 DCE 9Pin D Type Connector Definition
1
2
3
5
4
6
7
8
9
Pin Signal Name Direction Description
3 SD, Send Data
à
DTE send data to TA
2 RD, Receive Data
ß
TA send data to DTE
7 RS, Request to Send
à
DTE request to send data
8 CS, Clear to Send
ß
TA inform DTE can to send data
6 DR, Data Set Ready
ß
TA is ready receiving command from DTE
5 SG, Signal Ground
ß
TA signal ground (GND)
1 CD, Carrier Detect
ß
TA inform DTE that has a call incoming already
4 ER, Data Terminal Ready
à
DTE is ready, it can working now
9 CI, Ring Indication
ß
incoming ring indication