CoMa is suitable for most modems, however not all of us are perfect! (We admit it). To allow free use for dial strings etc, a button is available in "parameter general" called expert. By activating this button you will be able to insert your own AT commands. Be sure you know what you are doing before you start. HELPFUL HINT: Make a note of the default values BEFORE you change them!
 
But please, be shure what you do if you make any change to the default value!
 
Please notice that the changes in the expert mode will be reseted if you deactivate this function again. In this case our default parameter will take place again!
Expertmode in Preferences "General"
Init- und Exitstring
On line 2 dependant upon the modem it could be ATZ, ATZ1 or ATZ2. This field under no circumstances should contain an ATZ for most of the BZT registered modems (Germany users only!). If this happens an error message "modem reports error" will appear when you attempt transmission. In which case alter line 2 to AT.
In the EXIT-line you can put in the commands to be sent at the end of the transmission for normal cases ATZ .
Expertmode in Preferences "Fax"
 
Dialling commands
To cover all eventualities we have created four different dialling strings.
Send
If your modem is connected directly to your telephone line it might be alright to leave the command lines as they are. If you have got an extension between modem and telephone you have to switch off the pause for the free tone (X3) and also the line dial (0) and include a pause (,).
 
Signs given in brackets are AT commands and every modem should understand them. The dialling string for a modem on an extension should look as follows:
ATX3D0,<#>
The Mac does not use a DTR connection and the modem has to be made to ignore this signal with the command &D0! You will very probably have to configure your modem without DTR as well. But CoMa sets the "&D0" as default!
No dial
Sometimes one would like to transmit a fax during a telephone call, depending of course if the other side has got a combi fax. CoMa should not re-dial the telephone number now and the "dial tone detect" should be de-activated, because the modem would disconnect immediately if it does not hear a free tone. The command for this according to Hayes is "X1" or "X3". The dialling command should look as follows:
ATX3D
If you use an ISDN modem from Zyxel or ELSA there can be a problem if you work in voice-mode and fax-on-demand by a PIN is started. If you use such a modem described, you should use the following commands:
ATX3A
If the normal use is like the next section, it must be ATX3D .
If you activate the button "without dial" in the main dialogue box the modem will start without dialling to transmit the chosen fax pages. This can only function if you are using a phone connected via your modem.
Receive
We have created a dialling string if you want to give your modem special commands for the reception of fax pages. In 99% of the cases our pre-adjustments should do the job.
  Polling
Some firms and institutions offer a new service for owners of fax machines. You can call with your fax and call up fax pages. Your modem will send a poll request and the called machine sends the relevant fax pages. Is the remote machine a pure poll-sender, this works with class 2 fax modem.
Mention: Polling from your computer works only with CoMa Professional!
Expertmode in the dialogbox preferences "Voice"
Init
This command string will be sent to the modem after the switch to voice mode. You can use here the AT-command to adjust the loudness of the modem-speaker (L1...L5).
Dial
If necessary you can use a special dial prefix for the voice mode.
 
Expertmode for mailbox
Also for dialing in data-mode you can set a dial prefix.
