Premises IP telephony backbone to link the widely distributed corporate site

摘要

(57) Oyobi on the geographical location of the public switched telephony network 15, 17, 19 of two or more, [summary] hybrid IP backbone network 27, is compatible with the IP backbone network and data protocol that is compatible with the PSTN and a node 21, 23, 25 with a conversion server that is adapted to convert between the data and the one protocol. Are then routed to the IP node is converted into the data packet protocol is directed to the second node having a conversion server through another IP backbone, a call that has been put in the PSTN one, towards the PSTN other therethrough, I want to reach the final destination from there. In some embodiments, trunk gateways 71 and data gateway 69 is provided integrally with the IP node in the IP backbone network.