Dial Plan: Conference with multiple rooms and media control

[isdn-in]
exten => _X.,1,Answer ; Answer the line
exten => _X.,n,Goto(s,1)
exten => s,1,Set(TIMEOUT(digit)=5) ; Set Digit Timeout to 5 seconds
exten => s,n,Set(TIMEOUT(response)=10) ; Set Response Timeout to 10 seconds
exten => s,n(restart),BackGround(demo-instruct) ; Play some instructions
exten => s,n,WaitExten ; Wait for an extension to be dialed, use to select conference room

; You can create macro to set up vc menu
exten => 1,1,capicommand(clamping|100) ; Activate suppression of DTMF tones
exten => 1,n,capicommand(vc|incrxdgain|0|1.5) ; Install voice command menu for volume control, '0' to increase volume
exten => 1,n,capicommand(vc|incrxdgain|1|-1.5) ; Install voice command menu for volume control, '1' to decrease volume
exten => 1,n,capicommand(vc|txdgain|2|-128) ; Install voice command menu for volume control, '2' to mute tx path
exten => 1,n,capicommand(vc|txdgain|3|0) ; Install voice command menu for volume control, '3' to activate tx path
exten => 1,n,capicommand(chat|test1|m|1-4) ; Create/enter conference room 'test1'

exten => 2,1,capicommand(clamping|100) ; Activate suppression of DTMF tones
exten => 2,1,capicommand(txdgain|-128) ; Deactivate tx path
exten => 2,n,capicommand(vc|incrxdgain|0|1.5) ; Install voice command menu for volume control, '0' to increase volume
exten => 2,n,capicommand(vc|incrxdgain|1|-1.5) ; Install voice command menu for volume control, '1' to decrease volume
exten => 2,n,capicommand(vc|txdgain|2|-128) ; Install voice command menu for volume control, '2' to mute tx path
exten => 2,n,capicommand(vc|txdgain|3|0) ; Install voice command menu for volume control, '3' to activate tx path
exten => 2,n,capicommand(chat|test1|m|1-4) ; Create/enter conference room 'test1
exten => 2,n,capicommand(chat|test2|m|1-4) ; Create/enter conference room 'test2'

exten => i,1,Playback(invalid)
exten => i,n,Goto(s,restart)
exten => h,1,Hangup