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SIP ALG is a technology that is available on most commercial routers, which is a networking device that forwards traffic to the Internet, or between local area networks (LANs). The “SIP” part refers to Session Initiation Protocol. This is an underlying service that powers all VoIP activity. For example, SIP registers devices, ensures call presence, and governs call audio. The "ALG" part refers to Application Layer Gateway. This is a network address translation (NAT) tool that changes private IP addresses and ports into public IP addresses and ports. It functions as a proxy to re-establish the destination addresses in data packets, which...

An Internet Protocol (IP)-based phone system is much more than a few new phones plugged into your network. It transforms your phone system into a next-generation communications hub, complete with cutting-edge technologies that let your organization deliver better customer service while cutting costs. An IP-based phone system piggybacks on your IP-network, connecting to the public-switched telephone network (PSTN) via your internet connection. Use this checklist to sell management on a new IP-based phone system: Reduce the cost of phone charges.IP telephony can significantly reduce the cost of your long-distance charges. It also reduces the number of circuits to the PSTN you...