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VOLUME(TX|RX). Asterisk:

asterisk*CLI> core show function VOLUME
  -= Info about function 'VOLUME' =-
[Synopsis]
Set the TX or RX volume of a channel. \\     
[Description]
The VOLUME function can be used to increase or decrease the 'tx' or 'rx' gain
of any channel.
For example:
Set(VOLUME(TX)=3)
Set(VOLUME(RX)=2)
Set(VOLUME(TX,p)=3)
Set(VOLUME(RX,p)=3)
[Syntax]
VOLUME(direction[,options])
[Arguments]
direction
    Must be 'TX' or 'RX'.
options
    p: Enable DTMF volume control
[See Also]
Not available

2 :

  1. , . TX , RX .
  2. p, DTMF

VOLUME. extensions_customs.conf :

[root@asterisk ~]# vim /etc/asterisk/extensions_custom.conf
[volume-set]
exten => _X.,1,NoOp(Volume settings)
same => n,Set(VOLUME(TX)=5)
same => n,Set(VOLUME(RX)=5)
same => n,Goto(from-internal,${EXTEN},1)

Extension, Context, - volume-set.

Asterisk (FreePBX 13)

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P.S. , :)

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