what the hell
@embarqhsd.net
| reply to Network Guy
Re: Huh?
said by Network Guy  :Not a matter of fixing it but bending the telco's arms so they now have to provide access to those emergency trunks. The E911 system doesn't work on "secret numbers". The location the call is coming from, ie, residence, business or cell tower is assigned an ESN routing number. What happens in the background is transparent when you call 911. Basically when you dial 911 your call goes thru translations which uses the ESN number to determine what central office it goes to (similar concept of an area code), it also translates the number into a 7 digit phone number for that office. At that point the call is handled normally. The call goes thru the switch and is connected to what ever transport medium goes to the PSAP.
PSAPs often get wrong numbers (misdialed 7 digit phone numbers) and tele-marketers who use computerized dialing, dialing sequential numbers often also get to the 911 operator.
Regardless who the ILEC serving the PSAP is, a VOIP call is difficult in some cases to handle correctly as the phone number attached does not have an ESN and the facility the actual wireline call is from may not be in the area. Also considering that the VOIP CLEC may not be able to determine where the call originates from adds problems.
Most PSAPs, when a VOIP call is received, handle it as a wireless call as far as internal processing goes.
I'll leave the contractual problems between ILECs and CLECs out of this as I just wanted to let people know how 911 calls are routed and handled are not some deep dark secret that requires a blood oath to know. |
