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 VG400 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 10: Alternative Terminal and Modem Connections
AdapterRJ-45 Type CableCisco VG400 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-4 lists the pinouts.
Pinout shown is for category 3, 4, or 5 10/100BASE-T connection to an Gigabit Ethernet switch.
Note
Cisco VG400 Voice Gateway Hardware Installation Guide
36
Cable Specifications and Information
Alternative Connections to Terminal and Modem
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