Cisco 450 User Manual

Modem Port
(DCE,
DB-25)
RJ-45-to-DB-25
Adapter
“MODEM”
RJ-45-to-RJ-45
Rollover Cable
Auxiliary
Port
(DTE, RJ-45)
RTS4881RTS
DTR20772DTR
TxD2663TxD
GND7554GND
GND7445GND
RxD3336RxD
DCD8227DSR
CTS5118CTS
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
AdapterRJ-45 Cable TypeCisco VG450 Port Connection
DCE, DB-9 femaleStraight-throughConsole port to PC
DCE
5
, DB-25, maleRollover
4
Auxiliary port to modem
DTE2, DB-25, maleStraight-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

Cisco 450 Specifications

General

Brand	Cisco
Model	450
Category	Gateway
Language	English