[broadvoice-gplhost]
exten => s,1,Answer                     ; Answer the line
exten => s,2,Wait,2
exten => s,3,Playback(welcom-to-gplhost)
exten => s,4,Wait,2
exten => s,5,Dial(Sip/zigolaptop&SIP/zigo,20,rtT)
exten => s,6,Voicemail(u601)
exten => s,7,Hangup

exten => t,1,Voicemail(u601)

[from-freebox]
exten => s,1,Answer                     ; Answer the line
exten => s,2,Wait,2
exten => s,3,Playback(welcom-to-gplhost)
exten => s,4,Wait,2
exten => s,5,Dial(Sip/zigo&SIP/zigolaptop,20,rtT)
exten => s,6,Voicemail(u601)
exten => s,7,Hangup