Cable Specifications and Information

This appendix provides the connector and pinout information you need for making or purchasing cables used with Cisco VG450 Voice Gateway. To order cables from Cisco, see the Obtaining Technical Assistance section. This appendix contains the following sections:

Console and Auxiliary Port Cables and Pinouts

Your Cisco VG450 Voice Gateway comes with the cable and adapters you need to connect a PC, an ASCII terminal, or a modem to your Cisco VG450 Voice Gateway. The cable kit includes:

  • RJ-45-to-RJ-45 rollover cable

  • RJ-45-to-DB-9 adapter cable for console connection

  • RJ-45-to-DB-25 adapter cable for modem connection

The following illustrations and tables provide cable pinout information:

  • Console port to a PC—See Table A - 1 and Table A - 4.
  • Console port to an ASCII terminal—See Table A - 2 and Table A - 4.
  • Auxiliary port to a modem—See Table A - 3 and Table A - 4.

The console port is configured as data communications equipment (DCE); the auxiliary port is configured as data terminal equipment (DTE). Both are asynchronous serial ports and use RJ-45 connectors.

Console Port to PC

Figure A-1 shows the RJ-45-to-RJ-45 rollover cable assembly and the RJ-45-to-DB-9 female DTE adapter (labeled TERMINAL); Table A-1 lists the pinouts.

Figure 1. Figure A-1 Console Port to PC - Cable and Adapter
VG 450 Console Port to PC - Cable and Adapter
Table 1. Console Port to PC—Cable Pinouts (RJ-45 to DB-9)

Console Port

(DCE, RJ-45)

RJ-45-to-RJ-45

Rollover Cable

RJ-45-to-DB-9

Adapter “TERMINAL”

PC Port

(DTE, DB-9)

Signal

RJ-45 Pin

RJ-45 Pin

RJ-45 Pin

DB-9 Pin

Signal

RTS

11

8

8

8

CTS

DTR

2

7

7

6

DSR

TxD

3

6

6

2

RxD

GND

4

5

5

5

GND

GND

5

4

4

5

GND

RxD

6

3

3

3

TxD

DSR

7

2

2

4

DTR

CTS

81

1

1

7

RTS

1 Pin 1 is connected to pin 8 inside the Cisco VG450 Voice Gateway.

Console Port to ASCII Terminal

Figure A-2 shows the RJ-45-to-RJ-45 rollover cable assembly and the RJ-45-to-DB-25 female DTE adapter (labeled TERMINAL); Table A-2 lists the pinouts.

Figure 2. Console Port to ASCII Terminal—Cable and Adapter
VG450 Console Port to ASCII Terminal
Table 2. Console Port to ASCII Terminal—Cable Pinouts (RJ-45 to DB-25)

Console Port

(DCE, RJ-45)

RJ-45-to-RJ-45

Rollover Cable

RJ-45-to-DB-25

Adapter “TERMINAL”

Terminal Port

(DTE, DB-25)

Signal

RJ-45 Pin

RJ-45 Pin

RJ-45 Pin

DB-25 Pin

Signal

RTS

12

8

8

5

CTS

DTR

2

7

7

6

DSR

TxD

3

6

6

3

RxD

GND

4

5

5

7

GND

GND

5

4

4

7

GND

RxD

6

3

3

2

TxD

DSR

7

2

2

20

DTR

CTS

81

1

1

4

RTS

2 Pin 1 is connected to pin 8 inside the Cisco VG450 Voice Gateway.

Auxiliary Port to Modem

Figure A-3 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 lists the pinouts.

Figure 3. Auxiliary Port to Modem—Cable and Adapter
Auxiliary Port to Modem—Cable and Adapter
Table 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

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 4. Alternative Terminal and Modem Connections

Cisco VG450 Port Connection

RJ-45 Cable Type

Adapter

Console port to PC

Straight-through

DCE, DB-9 female

Auxiliary port to modem

Rollover3

DCE4, DB-25, male

Straight-through

DTE2, DB-25, male

3 An octal cable or RJ-45 breakout cable is equivalent to a rollover cable.
4 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.


Note
Pinout shown is for category 3, 4, or 5 10/100BASE-T connection to an Gigabit Ethernet switch.
Figure 4. RJ-45 Connector Wiring
VG450 - RJ-45 Connector Wiring
Table 5. Gigabit Ethernet Port Pinouts (RJ-45)

Pin5

Signal

1

TX+

2

TX–

3

RX+

4

–

5

–

6

RX–

7

–

8

–

5 Any pin not referenced is not connected.

Analog Voice Multiport Pinouts (RJ-21X/CA21A)

Figure A-5 shows the RJ-21 connector wiring for the cable used for the multiport analog voice interface.

Figure 5. RJ-21 Connector Wiring
VG450 - RJ-21 Connector Wiring

Table A-6 lists the pinouts for the RJ-21 connector.

Table 6. RJ-21 Connector Pinouts

Port Number

Connector Pin Number

Signal

Port Number

Connector Pin Number

Signal

1

126

RingTip

13

1338

RingTip

2

227

RingTip

14

1439

RingTip

3

328

RingTip

15

1540

RingTip

4

429

RingTip

16

1641

RingTip

5

530

RingTip

17

1742

RingTip

6

631

RingTip

18

1843

RingTip

7

732

RingTip

19

1944

RingTip

8

833

RingTip

20

2045

RingTip

9

934

RingTip

21

2146

RingTip

10

1035

RingTip

22

2247

RingTip

11

1136

RingTip

23

2348

RingTip

12

1237

RingTip

24

2449

RingTip

—

—

—

—

25, 50, 51, 52

GND