moving a 24 channel E&M winkstart,ESF B8ZS DNIS is four digits, out of option-11 to a norstar 4.1 with same provisioning. Can make calls out but cannot receive in bound calls just get a fast busy. Me and the service provider worked together, for hours, they would try sending what ever I asked for witch consisted of every thing from 0,2221 nothing, rabbit out of a hat, nothing worked.The T1 one works fine in the option switch the DNIS pointing at it is 2256 witch is an ext built in the option then assigned on the first key of an 2616 phone. Now I havent installed a t1 in a while, its be a PRI world for me and the t1 thats in the option is a both way trunk config. I dont know if this makes a difference.
Disclaimer> I could be wrong
Disclaimer> I could be wrong