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 ...

Today, we’re wrapping up our look at the evolution of ISDN and why it didn’t do well in the marketplace. This newsletter will look at the legacy of ISDN. The Primary Rate Interface (PRI), we believe, ...

A few weeks ago we wrote two newsletters about network-based services (see “Are you ready for network-based services? Part 1” and “Are you ready for network-based services? Part 2”), and we used the ...

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 ...

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 ...

This might sound foolish but I came into the project after the equipment was ordered and so i'm stuck with it. I have 2 sites. Each site has an ISDN PRI (switchtype dms-100) and a cisco 2612 router ...