Digicom COMSPHERE 3911 User Manual

September 1998

3910-A2-GN32-40

Table C-1 lists the EIA-232-D pin assignments for the modem.

1

—

AA

101

—

Shield

2

TXD

BA

103

DTE

Transmit Data

3

RXD

BB

104

DCE

Receive Data

4

RTS

CA

105

DTE

Request-to-Send

5

CTS

CB

106

DCE

Clear-to-Send

6

DSR

CC

107

DCE

Data Set Ready

7

SG

AB

102

—

Signal Ground

8

LSD

CF

109

DCE

Line Signal Detect

9

+12V

—

—

—

Reserved for test purposes (may be used to drive
one RS-232 load)

10

–12V

—

—

—

Reserved for test purposes (may be used to drive
one RS-232 load)

11

—

—

—

—

Unassigned

12

CT112

CI

112

DCE

Data Signal Rate Select

13

—

—

—

—

Reserved for future function

14

—

—

—

—

Reserved for future function

15

TXC

DB

114

DCE

Transmit Clock

16

—

—

—

—

Reserved for future function

17

RXC

DD

115

DCE

Receive Clock

18

CT141

LL

141

DTE

Local Loopback

20

DTR

CD

108

DTE

Data Terminal Ready

21

CT140

RL

140

DTE

Remote Loopback

22

RI

CE

125

DCE

Ring Indicator

23

CT111

CH

111

DTE

Data Rate Selector

24

XTXC

DA

113

DTE

External Clock

25

TEST

TM

142

DCE

Test Mode