Crosstalk on a Bt versatility system

[soundman1957]

Hi I am a newbie on this forum, but i am looking for some advice on a issue on a BT versatility system.

 

It is on a ISDN, the issue i have is there is crosstalk on all three extensions , i have rewired each point back to mdf, and still have the same thing, tried changing the IDSN card but no change.

 

BT has done some checks on the line and say that it ok

 

any help would be great ,just to get this thing off my back. Tony

[Icarus]

Had a very similar problem on a 30 user system. It turned out to be a fault in one of the 8 port extension modules. Check this first, if not it's almost certainly to be the mainboard that'll need changing.