SIP trunking is financially attractive. But it is important to size your SIP trunking to support the calling services that your enterprise requires The proliferation of SIP trunking makes the ...

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 ...

Just what is SIP trunking? Let’s take it one part at a time. SIP refers to Session Initiation Protocol, the standard developed in the 1990s by the Internet Engineering Task Force that is used to set ...

SIP trunking is a type of protocol used for VoIP, although the relationship between the two has often been confused. In this article, we’ll take a close look at what exactly SIP is, what SIP trunks ...

I’m trying to get info from a supplier and they are insistent that a trunk is a 1 to 1 with a call. Now I am 99.999% sure he's wrong, but before I tell him so I wanted to make sure someone who knows ...

For those with lots of distributed PBXs or key systems, adopting SIP trunking means deploying SIP-to-PRI gateways or managing large numbers of new trunks. New offerings based on session management can ...

XO Communications has unveiled an enterprise-class, multi-site Session Initiation Protocol trunking solution designed to add flexibility and scalability to distributed voice network architecture for a ...

Are SIP trunks as reliable as an ISDN PRI T1? I’m asked this question a lot, so I thought it’d be a great blog topic. I don’t think you are as concerned with this as the amber lights in the server ...

“SIP trunks”, the newer way to deliver low-cost voice, looks set to take off as a broadband-based service for businesses in 2010 to 2011. There are still some serious barriers on the way but new ...

So our phone system people are trying to setup a SIP trunk on our Mitel 3300 unit. I open up firewall ports and setup 1:1 NAT for the PBX's IP, everything looks like it should be OK. They are telling ...