Barracuda Networks SP4 Manual de usuario descargar pdf (Pagina 35)

BASIC CONNECTION TO A SINGLE CODER (DIRECT LINK)

ENG

Axel Technology srl

www.axeltechnology.com

16.3 CONNECTING A DIAL-UP MODEM

Whenever a remote control through dial-up modem is required, connect the modem to Serial Port 1, on the back of the

unit. Please pay attention to the Port 1 configuration: its speed must be set to:

- 38400 Baud for Pots dial-up modems

- 9600 Baud for GSM modems.

A ‘cross’ (NULL-MODEM) CABLE is needed for connection to the modem. The following table shows the wiring diagram

for the cable in both case the Modem has 9 pins or 25 Pins female SubD connectors.

Also remember to:

• On a 25 pin plug connect pin 6 and 8.

• On a 9 pin plug connect pin 1 and 6.

SHARK side (SubD9 Male)

Modem Side (SubD 9p M)

Modem Side (SubD 25p M)

6 and 1

6 and 8

Regarding the Receiving Modem (the one connected to the Shark serial port), it must have at least the following settings

(modem commands are in brackets. They are related to the most common modem models):

- IGNORE CD (the usual command is &C0)

- IGNORE RTS (&R1)

- IGNORE DTR (&D0)

- Disable TX Flow Control (&H0)

- Disable RX Flow Control (&I0)

- Disable Data Compression (&K0)

You also to set the S0 and the S2 registers in the following way:

- S0=2

- S2=255

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Barracuda Networks SP4 Manual de usuario Pagina 35