Method for providing voice-over-IP service

A method for managing network services between a plurality of networks comprising:

• receiving at a Voice Proxy Server (VPS) an Internet Protocol data packet with a corresponding source address from a first network, wherein the Internet Protocol data packet comprises a header and a payload and the payload of said Internet Protocol data packet contains at least a portion of a destination address;
• translating the destination address, wherein the translating comprises:
• receiving a first endpoint identifying parameter corresponding to a private network node;
• checking a mapping table for the first endpoint identifying parameter;
• allocating a logical line number to create a VPS endpoint identifying parameter based on said checking, wherein the VPS endpoint identifying parameter comprises the logical line number and VPS IP address;
• saving a mapping of the first endpoint identifying parameter and the VPS endpoint identifying parameter in the mapping table;
• and
• replacing the first endpoint identifying parameter with the VPS endpoint identifying parameter;
• and
• delivering the Internet Protocol data packet to a destination node on a second network based on said translating.