Adding an additional VoIP Amplifier within Asterisk

Hi Folks,

I’m very new to this.

Can some please advise me on how I can add VoIP Amplifiers with Asterisks. Below is the current conf

sfmltd-default

exten => 8226,1,System(cp --preserve /etc/asterisk/sound.call /var/spool/asterisk/outgoing/)
exten => 8226,2,Set(stopsound=1)
exten => 8226,3,Dial(SIP/8282,M(stopsound^SIP/8226))

exten => 7211,1,Answer
exten => 7211,n,Playback(9)
exten => 7211,n,Goto(7211,1)

exten => h,1,GotoIf($[“foo${stopsound}” = “foo”]?3)
exten => h,2,SoftHangup(SIP/8226,a)
exten => h,3,noop

exten => 8225,1,System(cp --preserve /etc/asterisk/sound2.call /var/spool/asterisk/outgoing/)
exten => 8225,2,Set(stopsound=2)
exten => 8225,3,Dial(SIP/8281,M(stopsound^SIP/8225))

sfmltd-zap-incoming

exten => 708226,1,System(cp --preserve /etc/asterisk/sound.call /var/spool/asterisk/outgoing/)
exten => 708226,2,Set(stopsound=1)
exten => 708226,3,Dial(SIP/8282,M(stopsound))

exten => h,1,GotoIf($[“foo${stopsound}” = “foo”]?3)
exten => h,2,SoftHangup(SIP/8226,a)
exten => h,3,noop

exten => 708225,1,System(cp --preserve /etc/asterisk/sound2.call /var/spool/asterisk/outgoing/)
exten => 708225,2,Set(stopsound=1)
exten => 708225,3,Dial(SIP/8281,M(stopsound))

exten => h,1,GotoIf($[“foo${stopsound}” = “foo”]?3)
exten => h,2,SoftHangup(SIP/8225,a)
exten => h,3,noop

[macro-stopsound]

include => default
exten => s,1,SoftHangup(${ARG1},a)

Thank you in advance