asterisk volume needs to be louder

Im running the latest asterisk business edition on an AA50.

but the volume seems very low when people ring in.

how do I increase this?

We are using sound files which have been recorded straight into the asterisk gui, via a grandstream phone.
Cheryl LanderAsked:
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grbladesCommented:
The sound level is generally fixed.
If you are using an analogue telephone line then you can boost the volume on the line.
There is a volume control on all phones.
If you are using recorded messages then you just need to make the recording louder.
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Cheryl LanderAuthor Commented:
One of the tech guys who help us setup the line had increased the volume, but that has now gone back to default since we had a power outage.

So it must be able to be changed somewhere.

The tech guy is on holidays.
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grbladesCommented:
So you want the volume increased on the telephone line?
You havent actually said what volume you want increased, in which direction, or what type of telephone connection you have.
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Cheryl LanderAuthor Commented:
I have a standard phone line.
I have a grandstream 2020
I have an aa50 business edition asterisk.

I need the volume increased in the aa50.

when people ring in, the voice menu recordings are very soft.

He only had access remotely to the aa50 so it must have been something in there.
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grbladesCommented:
Have a look in zapata.conf and the 'txgain=' and 'rxgain=' parameters. Setting these to a higher number will increase the received and transmitted volume.
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Cheryl LanderAuthor Commented:
These values aren't in there at all.

channels
group=
  signalling=fxo_ks
  channel=1,2,3,4
  group=
  signalling=fxs_ks
  channel=5,6,7,8

trunkgroups (nothing in here.
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grbladesCommented:
Try something like this which should increase the volume of the audio going out of the FXO interfaces.

channels
group=
 signalling=fxo_ks
 channel=1,2,3,4
 group=
 signalling=fxs_ks
 rxgain=0.0
 txgain=2.0
 channel=5,6,7,8
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Cheryl LanderAuthor Commented:
its actually quieter.

ive applied changes and rebooted.

group=
signalling=fxo_ks
channel=1,2,3,4
group=
signalling=fxs_ks
rxgain=0.0
txgain=2.0
channel=5,6,7,8

0
grbladesCommented:
Strange. Try experimenting with the value until you get it as you want it. Try 4 next for example and it should get louder. If it is still getting quieter then you can set it to -ve values.
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Cheryl LanderAuthor Commented:
So should I be modifying both rx gain and tx gain? and for both groups?

group=
signalling=fxo_ks
channel=1,2,3,4
rxgain=4.0
txgain=4.0
group=
signalling=fxs_ks
rxgain=4.0
txgain=4.0
channel=5,6,7,8

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grbladesCommented:
The first group is for the FXS interfaces which are the ones your analogue phones connect to.
The second is for FXO interfaces which are the ones that are used to connect to your telecoms company.
This is correct. FXO interfaces use fxs signalling. Confusing I know.

txgain adjusts the volume going out the interface while rxgain adjusts the volume coming in.

So if you adjust txgain of the 2nd group then this will be adjusting the volume people hear when they dial you and will include your voice and the asterisk generated sound.
If you altered rxgain on the 1st group this will perform a similar function in that people will hear you louder but asterisk generated sounds will be the same volume as you are only adjusting the volume on the analogue phones and not what asterisk is sending out to the telco.

Hope that makes it clear what does what and should help you to work out which volume you want to tweak.
I would just change one at a time to see what it is like and also make sure you dont have an issue with echo on the line which can become an issue if you adjust the values too much.
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Cheryl LanderAuthor Commented:
Ive been trying what you said between posts.

no good.
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feptiasCommented:
txgain and rxgain should make a difference. I think you need to restart asterisk (and possibly the zaptel drivers) after making a change to zapata.conf - easiest to just reboot the server. Also, try slightly bigger values for gain adjustment such as 6 or even 8. A change of 1 or 2 decibels would make a barely audible difference.
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