Sorry I meant he is a CTI integration specialist and works with Definity switches all the time.

The config is

Type PRI
Frame Format EFS
Supression B8zs
Signaling Common channel
Line Comp 1
Channel Unit Foreign Exchange
Net Service 5ess - 56/64 digtl
Inc Rtng route by dial plan
Number to Send Line tel Number
Switch type 5ess
The controller and internal loopback tests passed but the CSU loopback failed with the first line all 003 and the following lines all 004

Thanks

Ralph