Cannot hear caller and they cant hear me well either

[Ghyllwood]

I have a Fermax intercom on the gate and also at the front door. I have integrated this with 2 X DM01 interfaces.  Now ever since I have had this installed I cannot get the volume right and I can hardly hear the caller on my mobile phone. The level is not too bad on the house phone and similar to that of the Fermax handset. 

Are the adjustments I can make to get the Fermax intercom louder on my mobile? The Menu and answer phone level is fine over the mobile.

If I changed to  DMO2 interfaces for the Fermax, is this going to improve anything?

I am running Comfort2 and have tried adjusting the pots on both boards but just cannot improve the situation

 

Any thoughts on this greatly appreciated. Thanks   Graham

[admin]

What is your  Comfort II firmware?
You should upgrade to the latest firmware currently 5.183, see http://www.comfortforums.com/forum79/1784.html for download link and history

Also upgrade to the latest Comfigurator 3.1.9 and do a selective write of Tuning parameters to the system This should give good audio levels for the Intercom