Last week I switched from Spectrum to AT&T and now my Toshiba DKT3020-SD phone system has a problem. The line will flash red on an incoming call and the line works fine for outgoing calls, but the handsets (I have 8) none of them ring. Just a flashing red light. I have also downsized the office to one half the previous space so I am only utilizing half of the phones that are connected to the PBX. AT&T has run fiber to the suite and connected the phone system to their modem which is using VOIP. Do you have any idea why the phones are not ringing or is their someone in my area (Kearny Mesa/San Diego) who could provide tech support? Thanks

Last edited by justbill; 10/10/18 03:30 PM.