Digicom COMSPHERE 3910 Installation And Operation Manual page 230

COMSPHERE 3900 Series Modems
EIA-232-D Pin Assignments
Table C-1 lists the EIA-232-D pin assignments for the modem.
Pin Name
Circuit
1 —
2 TXD
3 RXD
4 RTS
5 CTS
6 DSR
7 SG
8 LSD
9 +12V
10 –12V
11 —
12 CT112
13 —
14 —
15 TXC
16 —
17 RXC
18 CT141
20 DTR
21 CT140
22 RI
23 CT111
24 XTXC
25 TEST
C-2
EIA-232-D Pin Assignments
EIA Signal
CCITT
Source
AA 101 —
BA 103 DTE
BB 104 DCE
CA 105 DTE
CB 106 DCE
CC 107 DCE
AB 102 —
CF 109 DCE
— — —
— — —
— — —
CI 112 DCE
— — —
— — —
DB 114 DCE
— — —
DD 115 DCE
LL 141 DTE
CD 108 DTE
RL 140 DTE
CE 125 DCE
CH 111 DTE
DA 113 DTE
TM 142 DCE
Table C-1
Shield
Transmit Data
Receive Data
Request-to-Send
Clear-to-Send
Data Set Ready
Signal Ground
Line Signal Detect
Reserved for test purposes (may be used to drive
one RS-232 load)
Reserved for test purposes (may be used to drive
one RS-232 load)
Unassigned
Data Signal Rate Select
Reserved for future function
Reserved for future function
Transmit Clock
Reserved for future function
Receive Clock
Local Loopback
Data Terminal Ready
Remote Loopback
Ring Indicator
Data Rate Selector
External Clock
Test Mode
September 1998
Circuit Function
3910-A2-GN32-40