Pin Connector Details for OmniAccess 780
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Chapter name (automatic)
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OmniAccess 780 Hardware Users Guide
Alcatel-Lucent
USP C
ARD
RS-232 C
ABLE
P
IN
-
OUT
D
ETAILS
The following table lists the RS-232 cable pin out at the DB-25 connector:
Table 8: USP Card RS-232 Cable Pin-out
Note:
1. Signal type V.28 is single ended.
2. DB-25 male connector is used on RS-232 DTE cable and DB-25 female connector
is used on RS-232 DCE cable.
Signal Name
Signal Type
(Note 1)
RS-232
Mnemonic
DB-25 connector
pin # (Note 2)
Direction
TxD
V.28
BA
2
DTE -> DCE
TT (DTE supplied
timing)
V.28
DA
24
DTE -> DCE
RTS
V.28
CA
4
DTE -> DCE
DTR
V.28
CD
20
DTE -> DCE
RL
V.28
RL
21
DTE -> DCE
LL
V.28
LL
18
DTE -> DCE
RxD
V.28
BB
3
DCE -> DTE
RxC
V.28
DD
17
DCE -> DTE
TxC
V.28
DB
15
DCE -> DTE
CTS
V.28
CB
5
DCE -> DTE
DSR
V.28
CC
6
DCE -> DTE
DCD
V.28
CF
8
DCE -> DTE
RI
V.28
CE
22
DCE -> DTE
TM
V.28
TM
25
DCE -> DTE
Signal Ground
-
-
7
-
Shield
-
-
1
-