Hello. Has anyone run into this before? We have a suite of conference rooms on one floor of building. All 9 rooms are equipped with Polycom SoundStation2 analog phones (CS1000 PBX). 5 of 9 are suddenly not able to dial internal or external numbers. Phones have dial tone, but when pressing digits to make a call, the dial tone continues to be heard and the call doesn't go thru. I've unplugged the power unit and reset the RJ11's, but still nothing. The weird thing is that you can call into the 5 phones. The Polycoms in the other 4 rooms are OK. I'm stumped. Next step is to try connecting one of the working Polys in a room where the Poly doesn't work. Building Engineering claims no recent power issues. Does anyone have any other suggestions? Thank you!