Please perform the following actions. This may work.
- Update your libpri files
- Install the latest DAHDI configuration files
- You can find the neccessary details for installation here
https://wiki.asterisk.org/wiki/display/ ... ing+LibPRI
After installing both libpri and dahdi to the latest configuration restart the DAHDI service.
Try this and let me know the update.
Yadukrishnan J S