We have a campus radio station which uses comrex blue box devices to broadcast audio. These comrex devices work fine over direct telco analog lines but have various problems on our VOIP system. I have it connected to a VG 202, have modem passthrough enabled everywhere. Calls connect and seem to stay connected but constantly 'retrain' during which there are silences in the broadcast. I contacted the comrex vendor and they were not very helpful, just indicated it will not work over VOIP. Why? Is there any way to make this work? It uses a synchronous POTS codec. Is there any tweaking/tuning that can be done either on the VG 202 or gateway routers (all MGCP) to improve performance?
Call traces do not indicate problem, CDR does not show jitter/lost packets/latency, etc...
According to comrex documentation retraining occurs 'if codec loses sync' or 'if it senses errors on line'.
Any help would be appreciated. I have been pulling my hair out on this!
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.