Forwarded call gets disconnected

[AhmadMA43005]

forwarded calls gets disconnected. ISP asking us to check configuration.

[Nithin Eluvathingal · Accepted solution]

are you using PRI ?

if yes, can you share the  output of "debug isdn q931"

on gateway check Calling Party Selection. if its originator, change it to First or last redirect number  and check if it works. 

[AhmadMA43005]

First Redirect Number resolved the issue.