Switching to SIP from ISDN

If you’re considering switching your old ISDN phone system to a SIP (Session Initiation Protocol for those that wonder what the hell it means, and are still no wiser) I …

Polycom IP Asterisk / Kerio Config

If you need to customise your Polycom phone interface, in this case a Polycom IP450, on an Asterisk based Kerio operator SIP phone system, the following may help with Polycom …