We are facing problem in our voice gateway.
All of a sudden, the incoming and outgoing pstn calls started not working. When I checked the VG,I could observe everything as registered in the VG and CCM. I restarted the VG and showing the pri Lines unregistered in the VG and CCM.
After changing VG router name in the CCM issue got resolved.
The VG router name in the CCM was CS3845VG.TRV and we changed to CS3845VG.TRV.ustr.com and the issue got resolved. Since last 3-4 years, the voice gateway router is working with the present configuration in the ccm with the hostname CS3845VG.TRV.