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COMSPHERE 3800 Series Modems – Model 3830
C-2 August 1998 3830-A2-GB91-30
Table C-1
(2 of 3)
EIA-232-D Pin Assignments
RS-232
Pin
Circuit
Function
Signal
Source
CCITT
EIA
Circuit
Name
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