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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.
Page 26 Dedicated Micros Ltd
Modems DVST Installation Guide