1. did you report your telephone line or your ADSL line ??(although they run on the same copper line different tests apply)
2.If you want to change your jack do so i dont think any one will notice the difference.(only 2 wires connected )
3."Also the disconnecting are getting more frequent as the temperature rises, could it be an overheating problem somewhere?"
The only thing that would heat up is the modem and you have changed that a few times.
You said you changed your modem 4 times so i am assuming 4 different power supply's for 4 different modems .The best way to test is connect the modem strait in to the telephone jack ,no spltter no phone nothing connected).
BTW where are you ?
To rule out the power it would be great if you could hook a multimeter up to the 220 supply and see when you disconnect if the power is stable or not.
2.If you want to change your jack do so i dont think any one will notice the difference.(only 2 wires connected )
3."Also the disconnecting are getting more frequent as the temperature rises, could it be an overheating problem somewhere?"
The only thing that would heat up is the modem and you have changed that a few times.
You said you changed your modem 4 times so i am assuming 4 different power supply's for 4 different modems .The best way to test is connect the modem strait in to the telephone jack ,no spltter no phone nothing connected).
BTW where are you ?
To rule out the power it would be great if you could hook a multimeter up to the 220 supply and see when you disconnect if the power is stable or not.