Modem Port
(DCE,
DB-25)
RJ-45-to-DB-25
Adapter
“MODEM”
RJ-45-to-RJ-45
Rollover Cable
Auxiliary
Port
(DTE, RJ-45)
RTS
4
8
8
1
RTS
DTR
20
7
7
2
DTR
TxD
2
6
6
3
TxD
GND
7
5
5
4
GND
GND
7
4
4
5
GND
RxD
3
3
3
6
RxD
DCD
8
2
2
7
DSR
CTS
5
1
1
8
CTS
Alternative Connections to Terminal and Modem
Your Cisco VG450 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 9: Alternative Terminal and Modem Connections
Adapter
RJ-45 Cable Type
Cisco VG450 Port Connection
DCE, DB-9 female
Straight-through
Console port to PC
DCE
5
, DB-25, male
Rollover
4
Auxiliary port to modem
DTE2, DB-25, male
Straight-through
4
An octal cable or RJ-45 breakout cable is equivalent to a rollover cable.
5
Modify the DB-25 adapter by removing the wire in pin 6 and placing it in the pin 8 position.
Gigabit Ethernet Port Pinouts (RJ-45)
Figure A-4
shows the RJ-45 connector wiring for the Gigabit Ethernet cable;
Table A-5
lists the pinouts.
Pinout shown is for category 3, 4, or 5 10/100BASE-T connection to an Gigabit Ethernet switch.
Note
Cisco 450 Voice Gateway Hardware Installation Guide
32
Cable Specifications and Information
Alternative Connections to Terminal and Modem
