Methods and systems are provided that use resources more efficiently for
calls originating and terminating in a first address space that use
services in an IP address space. A call is established from an originator
in a first address space to an IP device within an IP address space. The
IP device sends a message to a switch in the first address space
indicating a new destination in the first address space. The established
call is released and a second call is established from the originator in
the first address space to the new destination in the first address
space. In another implementation, a first leg of a call is established to
an IP device from a first address space. The IP device establishes a
second leg of a call to a destination in the first address space. The
calls are bridged and resources released.