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 ...

Some people may say that ISDN is dead, but that’s news to the millions who rely on ISDN Primary Rate Interface service for connecting PBXs and dial-up modem banks to the public network. While it’s ...

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 ...

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 ...

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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 ...

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 ...