We have a VG224 configured with SCCP and we are experiencing an issue with an analog phone not ringing (audible). The call flow is such that the call will go out the VG224 FXS over an OPX line and ring down an analog phone. The issue is that the analog phone does not ring so that the end user can hear that they have an incoming call. The calling party DOES hear ringback and if the called party (analog phone) picks up they will have 2-way audio. The issue is that there is never any audible ringing on the analog phone side.
VG224 running 12.4(24)T2. Other analog devices on this VG224 work with no issues. Its only a couple OPX lines that are having this issue.
This sounds like a REN problem - ringer equivalency number. If you have too many analog phones (generally in the US more than 5) on the same line they may not ring, or may have ring issues. Even if you have only one phone on the line, but it is a long distance from the device trying to ring it you can have the same issue. I have seen this in large plants where it is a long run of copper to the phone (in my case through several buildings). Additionally if there are intermediate devices you can have issues with this as well. Please note that even though they don't ring, in most other cases - as you describe- they may work just fine.
Here are the ring related specs from the VG224 data sheet:
50Vrms into 5 REN at zero loop length (balanced) if no DC offset
54Vrms into 5 REN at zero loop length (balanced) if no DC offset
These are the paths to get to each CCX logs through CLI. They may be helpful if you are having issues accessing RTMT or downloading logs through it.
If you want to download them you have to prefix "file get " and you can add one of the options (re...