Ucm 6204 and gxp 1628 handsets audio over voip trunk


#1

hi
when I make internal calls between extensions the audio are loud ,when I make calls over voip trunk I can hear the remote person clearly ,they hear me but very soft audio


#2

You may be able to get into the phone’s web interface and adjust the TX gain. Just be careful as too much and you may cause echo.


#3

hi i did increase it to +6 with no change (user stil says audio is soft on remote end) latest firmware vs


#4

What codecs you use internal and which one to call outside ?


#5

Does the audio appear differently to different external callees. Do they complain about should they call in?


#6

Hi If used g729 for internal (extensions)and over the trunk


#7

Hi yes when i phone out some callees dont complain some do


#8

Given that some do and some don’t, it sounds more like it is a variance in how the hand-off of the call to the various delivering carriers is being accommodated.

To Marcin’s point, you could try using a different codec such as g711a/pcma and see.

As this is a digital signal, the only way to increase the volume is via the phone’s TX gain. However, this may then cause echo and/or could cause some to start complaining that it is too loud.


#9

Hi after i changed the local and trunk codecs to g729 users has not complained als adjusted tx +6 on phones
Thnx


#10

I think if you leave only PCMU / PCMA on both the interior and Trunk you get a definitely stable and enjoyable audio.
G729 creates a “muffled” voice and if you have enough bandwidth it makes no sense to activate it.