Axel Falcon VS, User Manual, Page: 32 / 111

USE OF UNIVERSAL REMOTER SOFTWARE
13.4 CONNECTION TO A DIAL-UP MODEM
Whenever remote monitoring is required via a dial-up modem, connect the modem to Serial Port 1 on the back of the
unit. Check the configuration of Port 1 carefully, its speed must be set to:
- 38400 Baud for dial-up POTS modems
- 9600 Baud for GSM modems.
A ‘crossover’
CABLE ( NULLMODEM ) is required for the modem connection. The following table shows the wiring
diagram for the cable in both cases, whether the modem features 9-pin or 25-pin female SubD connectors.
Remember also that:
•
With a 25-pin plug, connect pins 6 and 8.
•
With a 9-pin plug, connect pins 1 and 6.
Falcon end (Male
SubD9) Modem end (M Subd 9p) Modem end (M Subd 25p)
Pin 2 3 2
Pin 3 2 3
Pin 4 6 and 1 6 and 8
Pin 5 5 7
The receiving modem (the one connected to the Falcon serial port) must have at least the following settings (modem
commands are given in brackets and refer to the most common modem models):
- IGNORE CD (the standard command is &C0)
- IGNORE RTS (&R1)
- IGNORE DTR (&D0)
- Disable TX Flow Control (&H0)
- Disable RX Flow Control (&I0)
- Disable Data Compression (&K0)
Registers S0 and S2 must also be set as follows:
- S0=2
- S2=255
The S0 register is the number of rings before Automatic Answering is activated. It sets the number of rings required
before the modem answers a call automatically. Range: 0-255 rings. Setting this register to zero disables automatic
answering mode. S0 = n, where n is the number of rings. We recommend you set S0 at 2.
The S2 register (Escape Code Character) specifies the ASCII value of the character used in the escape code. (The
escape code is the escape character entered three times in a row.) When the modem status is ‘connected’ and the
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