Phone Control Mode Command Example in extensions.conf

Dumb exten=>1234,nRpt,1234|D

Normal exten=>1234,n,Rpt,1234|P 

Phone exten=>1234,n,Rpt,1234|P

Simple exten=>1234,n,Rpt,1234|S  

VOX exten=>1234,n,Rpt,1234|Pv