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Link Interfaces Reference
32
Console Pinouts
The connector shown here and pinouts described here correspond to
the connector labeled “Console” on the back of the P1705 & P1730.
13
1
25
14
DB25 Female DCE
Contact
Number
CCITT
Circuit
Number Circuit
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 3 - 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.
Contact Number Modem Contact
Number
820
32
23
20 8
77
45
54
22 22
Figure 3 - 4 Console Null Modem Cable Pinouts