We have a Cluster Toip based on CCM 5 and it works so good, but we are in trouble with this kind of phone calls:
we have a VoiceGateway that support 2 PRI channel towards PSTN network, ending
into Carrier network that provide us connectivity to the cellular (umts and gsm) network; well, every calls directed to an enterprise cellular phone number is redirected by CCM toward this VG and all the other ip phone calls are managed in different manner.
So, we have a quality problem with all calls directed to enterprise cellular number. Mos is near 2 or 3 maximum and inspecting CDR and low quality reason we have no evidence about data network issue.
What I mean is that, if you inspect CMR regarding a single very bad cellular call phone you will not find Jitter or Packet Loss or Latency-Delay issue.
They are all near to 0, in the same way
as the other "normal" calls to non-mobile devices.
But MOS is very different and low.
What I can understand is that a parameter called "Concealment Frames" is crucial for this analisys, cause is the only one who change in a negative manner
if compared to normal calls to ip phone non-mobile.
So, we have a great amount of these Concealment Frames, and now, what does it mean ? which are the possible reasons for that ? what king of troubleshooting can we fire to find the originating device or path or other ?
Thank you very much 4 your appreciated answers in advance.
Mean Opinion Score (MOS) Listening Quality K-factor (LQK) is the calculated score based onconcealment frames within an initial 8-secondinterval that is updated each succeeding second during a single voice stream.The DSP plays concealment frames to mask frame loss in the voice packet streaTo measure the voice quality of calls that are sent and received within the network, Cisco Unified IP Phones use these statistical metrics that are based on concealment events.
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.