I have a Comfort system that does not "respect" what I tell "Him" LOL!
Which ever value of ring times i set for "Security Off" mode, it always answers after 4 or 5 times.
Worth to mention that "Answering Machine Bypass" changes this behaviour.
I tried to set the ring times to say... 40 when security off, and enabeled answering machine bypass, so that this way, the client could use this walkaround to "reach" for the "phone menu", but it answers after 5 times aprox..
There was a similar problem in Portugal due to the pattern of the rings being different from otther countries. For example if the silence between rings is very long then the call is considered ended This was fixed a few years ago.
Different telephone lines in Portugal perhaps have different patterns
Can you listen to the pattern of ringing on the line which has this problem and try to describe it as precisely as possible
eg for the UK, they have 2 short rings of 0.4 seconds separeted by 0.2 seconds followed by 2 seconds silence
In your case what is the pattern, is it constant ring duration and silence, what is the 1st silence, and 2nd silence between tones, and are the silences between rings constant?