Serial Port Pin Assignments - Enterasys R1 SOHO Setup And Installation Manual

RJ-11 Pin Assignments
4
1,2,5,6

Serial Port Pin Assignments

The DB-9 serial port, see
RoamAbout R1 to an ISDN TA or PSTN modem. The pin assignments used to connect to
this port are provided in the following tables.
Figure A-3: DB-9 Serial Port Pin Numbers
EIA CCITT
Circuit Signal
CF 109
BB 104
BA 103
CD 108.2
AB 102
CC 107
CA 105
CB 106
CE 125
A-4
Tip
Rx+
Figure A-3
, located on the rear panel is used to connect the
Description R1 DB9
DTE Pin #
DCD 1
(Data Carrier
Detected)
RxD (Received 2
Data)
TxD 3
(Transmitted
Data)
DTR 4
(Data Terminal
Ready)
SG 5
(Signal Ground)
DSR 6
(Data Set Ready)
RTS 7
(Request-to-
Send)
CTS 8
(Clear-to-Send)
RI (Ring 9
Indicator)
PC DB9 Modem
DTE DB25
Pin # DCE
Pin #
1 8
2 3
3 2
4 20
5 7
6 6
7 4
8 5
9 22
Signal
Direction
DTE-DCE
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