[asterisk-users] mobile centrex solution

[Eric Fort]

anyone know of a solution where mobile handsets out roaming the pstn
cellular network can be used and treated as full fleged centrex
extentions, i.e. I can transfer a call that comes in on a wired
centrex copper pair out to a cell phone and the cell phone can
transfer the call back or vice versa where the cell phone recieves the
call directly and can transfer to the office all without hairpinning
the call?  essentially when the call is transfered I'd like to have
asterisk get out of the call path but still have the capability to
transfer the call back to asterisk and it's attached office phones.

Thanks,

Eric