Patent ID: 7830865

Claim:
A network device operable to provide supplementary services information in a packet voice network, comprising: a first communication device to receive a list of information elements as a Q.931 message from a separate and independent sending station in a private branch exchange network; a tandem node separate and independent from the first communication device to: insert the list into an analogous call control message for the packet voice network such that any supplementary services information included in the information elements from the Q.931 message is preserved in the packet voice network, wherein the tandem node is configured to insert the list into the analogous call control message by appending the list to a tail of the analogous call control message, and wherein supplementary services are services that rely upon the presence of another service to operate and include at least one of call forwarding, call hold, call transfer, call waiting, and completion of call to busy subscriber; and map a locally significant message into a globally significant message in a private branch exchange network wherein any supplementary services information in the locally significant messages is preserved in the packet voice network, wherein the locally significant message is a message that is otherwise not transmitted to other stations on a network but upon which at least one supplementary service relies; and a second communication device to send the analogous call control message and the globally significant message to a receiving station in the private branch exchange network.