It's a rare organization that completely cuts over to SIP trunks for 100% of their telephony services. A few weeks back, Matt Brunk posted an interesting entry about his experience with an outage at ...
If your provider doesn’t offer a quality small-site SIP solution (such as a small-site focused hosted VOIP/UC service, or SIP Trunking service over certain types of cable modem service, as some MSOs ...