Console pinouts – Black Box LR5100A-T User Manual
Page 89
Interface Pinouts
81
Console Pinouts
The connector shown here and pinouts described here correspond to the connector labeled
“Console” on the back of the unit.
DB25 Female DCE
13
1
25
14
Contact
Number
CCITT
Circuit
Number
IEEE
Circuit
Desig.
Circuit
Name
Direction
To From
DCE DCE
1
101
AA
Protective Ground
NA
2
103
BA
Transmitted Data
X
3
104
BB
Received Data
X
5
106
CB
Clear to Send
X
6
107
CC
Data Set Ready
X
7
102
AB
Signal Ground
NA
8
109
CF
Received Line Signal Detector (CD)
X
20
108.2
CD
Data Terminal Ready
X
22
125
CE
Ring Indicator
X
Figure D-3 Console Pinouts
The connecting cable must be a shielded cable.
When connecting the router console directly to a modem, a null modem cable must be used
because both the router console and the modem are DCE devices. A null modem cable
with pinouts according to the following figure must be used.
router Contact Number
Modem Contact Number
8
20
3
2
2
3
20
8
7
7
4
5
5
4
22
22
Figure D-4 Console Null Modem Cable Pinouts