NI1 and NI2 are a set of specifications for a standard national implementation of ISDN. most of the PRI work I have done has alwasy been NI2. Pri works ok on that system, not sure if it is an issue for your customer, but the callers will hear "european ring" rather than a normal american ring. I had a company have me remove it because of that.

[This message has been edited by OhioTelecom (edited April 05, 2005).]