[macro-monitor-and-accept]
exten => s,1,Monitor(wav,${MACRO_EXTEN}-${STRFTIME(${EPOCH},,%Y%m%d-%H%M)})
exten => s,2,Dial(SIP/8192,30,t)
exten => s,3,Voicemail(8192)
exten => s,4,Hangup

[from-voiptalk]
exten => [mynumberhere],1,Macro(monitor-and-accept)