Session Initiation Protocol (SIP) signaling messages, such as a SIP INVITE
message and/or a SIP Redirect message, which are adapted for
communicating signaling information between a plurality of network
elements located on a multi-media services provider system to set-up a
call between at least a first communication device and at least a second
communication device of a plurality of communication devices. The SIP
INVITE message includes a plurality of address and/or routing information
located in a request-URI portion. The SIP Redirect message includes a
plurality of address and/or routing information located in a contact
header portion.