A-5
Cisco VG224 Voice Gateway Hardware Installation Guide
OL-5006-04
Appendix A Cable Specifications and Information
Console and Auxiliary Port Cables and Pinouts
Auxiliary Port to Modem
Figure A-4
shows the RJ-45-to-RJ-45 rollover cable assembly and the RJ-45-to-DB-25 male DCE
adapter (labeled MODEM);
Table A-3 on page A-5
lists the pinouts.
Figure A-4
Auxiliary Port to Modem—Cable and Adapter
Alternative Connections to Terminal and Modem
Your Cisco VG224 voice gateway ships with an RJ-45-to-RJ-45 rollover cable and two adapters for
connection to a PC, a terminal, or a modem. If you want to use an RJ-45 straight-through cable or other
adapters, see
Table A-4
for usable cable and adapter combinations.
Table A-3
Auxiliary Port to Modem—Cable Pinouts (RJ-45 to DB-25)
Auxiliary Port
(DTE, RJ-45)
RJ-45-to-RJ-45
Rollover Cable
RJ-45-to-DB-25
Adapter “MODEM”
Modem Port
(DCE, DB-25)
Signal
RJ-45 Pin
RJ-45 Pin
RJ-45 Pin
DB-25 Pin
Signal
RTS
1
8
8
4
RTS
DTR
2
7
7
20
DTR
TxD
3
6
6
2
TxD
GND
4
5
5
7
GND
GND
5
4
4
7
GND
RxD
6
3
3
3
RxD
DSR
7
2
2
8
DCD
CTS
8
1
1
5
CTS
MODEM
C
AB-5MO
DCM
RJ-45 cable
RJ-45-to-DB-25 male adapter
H11194
8
1
1
25
13
14
Table A-4
Alternative Terminal and Modem Connections
Cisco VG224 Port
Connection
RJ-45 Cable Type
Adapter
Console port to PC
Straight-through
DCE, DB-9 female
Auxiliary port to modem
Rollover
1
1.
An octal cable or RJ-45 breakout cable is equivalent to a rollover cable.
DCE
2
, DB-25, male
2.
Modify the DB-25 adapter by removing the wire in pin 6 and placing it in the pin 8 position.
Straight-through
DTE
2
, DB-25, male
