How does 911 work with SIP trunks?

Actually, 911 works very well. With Broadvox, it’s all about the number that is out-pulsed from the customer’s telephone system (which is usually easily configurable in the phone system). The number out-pulsed has to be a 911-registered number with Broadvox. The following examples illustrate this:

  • BTN – Billing Telephone Number: All Broadvox BTNs are 911-registrable. Usually the BTN corresponds with the physical address of the company. If a 911 call is placed from the corporate office, the phone system will send the BTN, thus emergency personnel will show up at the correct address.
  • EDID Enhanced DID: This is a Direct Inward Dial (DID) number with 911 registration. For example, a home worker places a 911 call with their IP phone. The phone system is programmed to out-pulse that EDID number, which is a 911-registered address with Broadvox. That number corresponds to the physical address of the home worker – not the main office (which is where the SIP trunks are terminated).

It is very important to note that you must coordinate with Broadvox to register the appropriate address and have it correspond with the phone number. It is equally important to program the telephone system to out-pulse the appropriate caller ID. Always test this during the phone system installation.