Guardian Technologies DVST No Dialtone, Transmission speed, User=ATX3*BDO&Y1&W1 Where, AT*MXn

Modems DVST Installation Guide

No Dialtone

In some cases the MODEM will not recognise the prescence of a dial tone from the exchange. The following codes will allow blind dialling and if these are needed permanently they should be followed by:

User=ATX3*BDO&Y1&W1 Where

ATX3 is Dial blind without presence of dial tone *BD0 Wait two seconds before dialling

&W1 Store above settings in option 1 &W1 Power up using these settings

Note: This feature is country specific and may not be available in some versions of the MODEM’s software. Please refer to the literature supplied with your MODEM.

Transmission speed

The MODEM can be a little ambitious in setting the line speed. It is likely that a link will be established at a higher speed than the line can support without an unacceptable level of errors.

In these cases it may be necessary to limit the speed of transmission until a reliable point is reached.

Maximum line speed may be set by the command:

AT*MXn

where the value for n equals following baud rate applies:

13=28800

12=26400

11=24000

10=21600

9=19,200

8=16,800

7=14,400

6=12,000

5=9,600

4=7,200

3=4,800

2=2,400

1=1,200

0=300

To limit the speed of transmission to 14,400 use AT*MX7. This could be stored in the USER= string.

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