We are using PGW 2200 & MGW AS5400 for TDM termination from VOIP, I often observed on MGW many E1 channels in ei8ther blocked states or proposed state.i have following question in regards to this
1. If E1 channels or ISDN channels in blocked or proposed state where is the issue
2. how we can rectify it & what we can fo avodi such state permanant basis
3 is there any relation between this 2 channel state and connectivity of PGW <--->MGW<-->PSTN operator g/w, any of this connectivity fluctuate can affect E1 channel state & then its blocked or porposed state.
If you notice there is a mismatch between the state of a CIC and its mated ISDN bearer, you can use the sta-aud
MML command to try and resolve the situation momentarily. If the situation happens frequently you will need to find the root cause by troubleshooting the issue and this often involves tracing/debugging the traffic on the CIC side (ISUP between PGW and PSTN) and the mated bearer (ISDN-like signalling between PGW and Voice gateway) as there is indeed a close relationship between some ISUP messages and Q.931+ messages that can affect CIC/bearer status. Also, IP connectivity issues can play a role as they can cause some of these messages to be missed. So, it is important to have stable IP links, and of course your E1 circuits should be running clean of errors as well.
Information your provided is very useful for me. But can you tell me in simple way where is the issue we can say if E1 channels are in Blocked or proposed state.
is there any relation between this 2 channel state and connectivity of PGW <--->MGW<-->PSTN operator g/w, any of this connectivity fluctuate can affect E1 channel state & then its blocked or porposed state.