E911 Over IP: VoIP Makes Emergency Calls Much Cheaper, Much Better

Perhaps the only remaining deterrent to consumer adoption of VoIP is the belief that Emergency 911 calling services do not work well with the technology. While this may have been true in VoIP’s earliest days, it is certainly not the case now.

Decades-old dispatch technologies are holding E911 back, not VoIP.

In the US, there are plenty of E911 options available that permit VoIP users to abandon their landline with little fear that vital emergency services are unavailable. And, in some cases, VoIP-specific E911 can provide more robust emergency services than any of the large incumbent carriers.

Of course, E911 requires no customer action with landlines and with many VoIP-hybrids offered by the major cable television providers. If the phone service is working, then E911 is working.

But with VoIP providers such as VoicePulse and others, getting E911 to work takes a small bit of effort: A customer must associate a physical address with their service, easily and quickly done on the provider’s web site. VoicePulse offers E911 calling with the company’s well-regarded low-cost consumer plans, and asks the customer to enter their physical address where emergency services can be dispatched as part of the sign-up process.

The one potential drawback to remember, though, is that while VoIP is mobile, E911 is not. You can take a VoIP adaptor to a different location, plug it into an internet-connected router, and start making phone calls. But if you dial 911 from the new location, a dispatcher will be sending soon-to-be-angry emergency crews to the address associated with your service, not where you are.

While its currently free calling service has become very popular, Google makes it very clear to its customers that its Google Voice service offers no E911 coverage. Still, Google Voice can easily be supplemented with very inexpensive E911 coverage. The easiest way to do so is to install an OBi100 or OBi110 manufactured by Obihai Technology, the only analog telephone adaptor on the market that can be used directly with Google Voice, and to sign up with a low-cost “a-la-carte” E911 service by companies such as Anveo ($0.80/mo.) or Callcentric ($1.50/sign up; $1.50/mo.).

Using Google Voice and the Obihai adapter (less than $50), a U.S.-based home can receive full fledged telephone service, including voice mail, call forwarding, and E911 calls, for less than $10 a year. Even whittling down a traditional landline carrier’s plan to its barest essentials costs more than 40 times as much.

Even at its extremely low-cost, Anveo offers E911 capabilities not possible over landlines. Denis Chukhryaev, Anveo’s founder and CEO, points out that the company’s “Emergency Dispatch Notification,” a $3.99/mo service that, besides contacting emergency dispatchers, can also send notification to a remote user in the event of a 911 call. For example, Chukhryaev points out, a business owner away from the office can be immediately alerted, via a phone call, email SMS or IM, if an emergency call is made at the workplace.

As part of their $0.80 cent service, Anveo allows its customers to use their browser to select between multiple locations to send emergency services to, allowing the user to transport a VoIP device between, for example, a home, an office and a vacation home. While this raises the possibility of user error (for example, forgetting to reset a location before an emergency), Chukhryaev says the company has not experienced a single misdirected emergency call — which would cost the company $75 — in the five years Anveo has been in service.

VoicePulse CEO Ravi Sakaria says the company is working on ways “to “to move emergency communications away from a decades old approach.”

Sakaria envisions a complete end-to-end IP-based emergency system, where a VoIP carrier maintains user-specific information in a database. “A call comes in to 911, and a VoIP provider can instantly forward the address attached to the incoming call, and also things like recent medical history, drug allergies, the age of residents at the location, the exact physical location on a property, (like a back-yard cottage or a top unit, etc.).”

The limitation is not VoIP, it’s an antiquated emergency calling infrastructure. “It’s time to look at the flip side of the widely held belief that VoIP poses some risk in the use of 911 service,” Sakaria said. “The real risk is that current emergency services, by not moving on to the use of VoIP, are in fact limiting the scope of services they offer.”


  1. Dave Mackey says:

    Great article. I remember the E911 concern and was not aware of the large strides taken to improve the situation.

  2. PG Morgan says:

    I‘m sick of the too many VoIP’s in the market. They claim so much and the output is duuhhh! It doesn’t work for me though! Does anyone know a quality standard VoIP that runs great on my iPhone 3G? Offering great voice quality but cheap Calls to mobile phones and landlines? Works on 3G? Supporting Group Video Calls is a plus as I need to commute for my business purposes.

  3. Warren says:

    The basic message of the article, that legacy technology in PSAP’s is a (maybe “the”) significant hurdle to overcome in leveraging the many benefits of IP-based emergency services (incorporating video for example) is true enough. And even as end-users become more mobile, there are technologies that can address the location awareness issue on behalf of legitimate users.

    However, one problem the article fails to mention is the issue with bad actors. Those who seek attack vectors are able take advantage of the open architecture of IP networks to intentionally “spoof” calling party data. “SWAT” attacks have been on the rise in recent years precisely because the ease in which attackers are able to impersonate other callers.

    It would be interesting to hear how it is proposed this problem will be solved?

  4. AndyH says:

    I took the link to the Anveo site and found no mention of 911 service. There were other VOIP service but 911 is not mentioned. Did I miss it somewhere? Can anyone provide link if found?

  5. voxilla says:

    Here’s a direct link to Anveo’s FAQ on their E911 service: http://www.anveo.com/faq.asp?code=faq_e911. If you don’t have an account with Anveo, some of the information is difficult to find. However, it costs nothing to create an account.

  6. AndyH says:


  7. Felix Rabinovich says:

    In the VoIP world, E911 shouldn’t be associated with phone number at all. It’s the same “backward compatibility” that prevents many companies from innovating. Ideally, 911 calls should be tied to IP address and through integration with ISPs allow emergency services be dispatched to the right address.
    VSP needs to be out of E911 solution; and this whole E911 tax is just another way for the regulators to nickel and dime us.

  8. Kirsty says:

    VOIP services reduce the cost of international and long-distance calls and it is widely used services in business as well as now in residential services. VOIP services provide phone services over your broadband connection so it is a good reason behind using VOIP service in residence or business.