[Asterisk-Users] Softphone - Freeware?!

[Eric Bart]

> >I don't understand why sipura can do consultative transfer
> >and why grandstream can't. They're both SIP, aren't they ?
> >  
>
> They use different sip stacks... and yes, they are both sip.

Maybe the sipura transfer is using a sip reinvite or some 
other SIP command. 

Does the consultative transfer works when the other parties are 
not attached to a sipura phone (ie when a sipura phone try to 
make a consultative transfer from a grandstream to a snom) ?