COMSPHERE 3800 Series Modems ± Model 3830

Table C-1

(2 of 3)

EIA-232-D Pin Assignments

RS-232

Pin

Name

EIA

Circuit

CCITT

Signal

Source

Circuit Function

9

+10V

±

±

±

Reserved for

 

 

 

 

 

test purposes

 

 

 

 

 

(may be used to

 

 

 

 

 

drive one

 

 

 

 

 

RS-232 load)

 

 

 

 

 

 

10

±10V

±

±

±

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

 

 

 

 

 

 

18

CT141

LL

141

DTE

Local Loopback

 

 

 

 

 

 

20

DTR

CD

108

DTE

Data Terminal

 

 

 

 

 

Ready

 

 

 

 

 

 

21

CT140

RL

140

DTE

Remote

 

 

 

 

 

Loopback

 

 

 

 

 

 

C-2

August 1998

3830-A2-GB91-30

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Image 100
Paradyne 3830 manual Signal Source Circuit Function