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 trunking is popular, cost effective, and it has beneficial features compared to T1 and PRI access. Large numbers of SIP installations continue to take place year after year from many different ...

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 ...

If you still think SIP trunking is primarily about cost savings -- guess what? You're still right. The conventional wisdom on SIP trunking was expected to shift over time, in a classic new-technology ...

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 ...

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 ...

The last blog introduced the four trunk types used in Cisco Unified Communications Manager (CUCM) to route calls over an IP network. The four types are as follows: The H.225 trunk is a replacement for ...

I really wanted to pose this question in Paladin's thread, but didn't want to thread-jack. Our local telco used to be GTE and they were ... OK ..ish. Then they became Verizon and, over time, they ...

How do I connect ISDN PRI via a Cisco AS5350 to a VPN server? PRI on one side and IP on the other? As far as physical connectivity is concerned you need to match interface and, based up on the ...