I have a customer who has had the same system with a PRI for eleven years. Every year, like clockwork, their PRI goes down and won't come back up. Every time this happens, we have to get Verizon to come out and they realize that the NI2 protocol has somehow been changed to NI1. This happened again this past Monday.

We got them to change it back to NI2, but now they can't dial ten-digit local calls. They are only able to dial seven or eleven-digits. Verizon can't figure out what is going on and has just about thrown their hands up, blaming our equipment as usual.

Keep in mind that we haven't changed anything on the system other than the obvious swapping out the PRI card, etc. How I figured out that it was only ten-digit calls that were affected is a miracle, since they don't have seven-digit dialing in this area.

Can anyone think of something that I can throw at Verizon to get them pointed in the right direction? By the way, the PRI is coming from a DMS100.

Ed Vaughn, MBSWWYPBX