We are experiencing an odd issue with our UC540 with VWIC2-1MFT-T1/E1 voice interface card. The system runs fine for about 20 or 30 minutes, then staff are unable to get a line when they pick up the phone and get the engaged tone instead. CLI report...

Our telco (Virgin Media Business, UK) have asked for some information about the PBX (UC540) in order to correctly configure ISDN PRI (E1 - ISDN30) at their end. We have a VWIC2-1MFT-T1/E1 voice interface card installed in the UC.Specifically they wan...

I am trying to connect the UC540 to the internet in order to set up SIP.The ISP, Virgin Media Business, (cable) have provided a Netgear Router with their own proprietary firmware which does not allow the router to be used as a straightforward modem. ...