There's probably a really easy way to do this, but I'm trying to get a Polycom VTX Analogue conference phone working on my UC520.
The UC520 has an ISDN PRI (E1) on a VIC card and the standard 4 x FXS, 4 x FXO.
I've plugged the Polycom in to one of the FXS ports and get no dial tone, just a 'slow-fast' signal (not sure if that makes sense!!).
Any help would be greatly apprecitated.
Thanks in advance.