VoIP calling was first introduced to the world in the mid 1990's with PC-to-PC calling only. VoIP started to be mass-marketed in 2004 with both the proliferation of consumer broadband usage and advancements in IP switching and routing equipment. Initial coverage for E911 calling was rudimentary because there was typically only one number per residence.
When business VoIP calls are place, the critical factor for call termination is the ability of the network to identify the location of the IP endpoints – wherever they may be on the network – as in anywhere on the Internet.
VoIP-based E911 solutions do exist that relay physical locations of callers, but ultimately, it's up to a business's employee communicate where exactly they are calling from.
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