Auxiliary Port To Modem; Alternative Connections To Terminal And Modem - Cisco VG224 - Analog Phone Gateway Hardware Installation Manual

Appendix A Cable Specifications and Information

Auxiliary Port to Modem

Figure A-4
adapter (labeled MODEM);
Figure A-4
RJ-45 cable
Table A-3
Auxiliary Port
(DTE, RJ-45)
Signal
RTS
DTR
TxD
GND
GND
RxD
DSR
CTS

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
Cisco VG224 Port
Connection
Console port to PC
Auxiliary port to modem
1. An octal cable or RJ-45 breakout cable is equivalent to a rollover cable.
2. Modify the DB-25 adapter by removing the wire in pin 6 and placing it in the pin 8 position.
OL-5006-04
shows the RJ-45-to-RJ-45 rollover cable assembly and the RJ-45-to-DB-25 male DCE
Table A-3 on page A-5
Auxiliary Port to Modem—Cable and Adapter
RJ-45-to-DB-25 male adapter
8
1
Auxiliary Port to Modem—Cable Pinouts (RJ-45 to DB-25)
RJ-45-to-RJ-45
Rollover Cable
RJ-45 Pin RJ-45 Pin
1 8
2 7
3 6
4 5
5 4
6 3
7 2
8 1
Table A-4 for usable cable and adapter combinations.
Alternative Terminal and Modem Connections
RJ-45 Cable Type
Straight-through
Rollover
Straight-through
Console and Auxiliary Port Cables and Pinouts
lists the pinouts.
14
25
RJ-45-to-DB-25
Adapter "MODEM"
RJ-45 Pin DB-25 Pin
8 4
7 20
6 2
5 7
4 7
3 3
2 8
1 5
Adapter
DCE, DB-9 female
1 2
DCE , DB-25, male
2
DTE , DB-25, male
Cisco VG224 Voice Gateway Hardware Installation Guide
1
13
Modem Port
(DCE, DB-25)
Signal
RTS
DTR
TxD
GND
GND
RxD
DCD
CTS
A-5