After I think 1 mounth of analisys and researchs, I found that on FANVIL X4G (with any firmware release, even the latest of 2018/06/04) there is an annoying bug, maybe related to a bad cdr management that overload the fanvil's cpu:
if in phone settings --> Enable Call History is flagged then the follow happens
I pickup the phone(external or internal) in a first moment everything is perfect, but exactly after 30 seconds the voice is dropped let's say for 1/4 second, then a delay is inserted in the conversation, in that moment ping from pbx to the extension goes from 0,4ms to 300-500ms. then slowly the delay disappears but it will take some minutes or even will never disappears. This is replicable also with echo test.
if in phone settings --> Enable Call History is not flagged then everythink is perfect.
In a first moment this was a setup with freepbx, but recently I switched this particular system to 3CX cause it looks have a better fanvil compatibility(I have around 60 of these phones so I cannot change them all)
and problem is still the same, in different places, hardware and technologies.
I already wrote to fanvil support with no response, cause call history is really important for this particular customer, furthermore because of the type of work of this customer, it often happens that employees talk to each other on the phone looking in the eyes, this delay generates a really annoying effect, also if the call is external, this delay will also affect the quality of the conversation.
Just want to know if someone experienced the same problem and maybe found a different way to fix this, I have wrote for support even to freepbx forum but it looks like fanvil it is not a very well known brand.
many many thanks
if in phone settings --> Enable Call History is flagged then the follow happens
I pickup the phone(external or internal) in a first moment everything is perfect, but exactly after 30 seconds the voice is dropped let's say for 1/4 second, then a delay is inserted in the conversation, in that moment ping from pbx to the extension goes from 0,4ms to 300-500ms. then slowly the delay disappears but it will take some minutes or even will never disappears. This is replicable also with echo test.
if in phone settings --> Enable Call History is not flagged then everythink is perfect.
In a first moment this was a setup with freepbx, but recently I switched this particular system to 3CX cause it looks have a better fanvil compatibility(I have around 60 of these phones so I cannot change them all)
and problem is still the same, in different places, hardware and technologies.
I already wrote to fanvil support with no response, cause call history is really important for this particular customer, furthermore because of the type of work of this customer, it often happens that employees talk to each other on the phone looking in the eyes, this delay generates a really annoying effect, also if the call is external, this delay will also affect the quality of the conversation.
Just want to know if someone experienced the same problem and maybe found a different way to fix this, I have wrote for support even to freepbx forum but it looks like fanvil it is not a very well known brand.
many many thanks
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