What is VoIP?. Telephone Service as we know it, today…. Telco PSTN, CO Switch. Evolution. IP Network . LAN or WAN, Router. IP Telephone. IP Telephone. What is IP?. Internet Protocol (IP) characteristics: IP is a Protocol A Method of Communication Industry Standard (De Facto)
Telephone Service as we know it, today…
Telco PSTN, CO Switch
LAN or WAN, Router
Internet Protocol (IP) characteristics:
8-Bit Sample @
Analog to Digital Converter
*External microphonein use!
Benefit: Lower Cost
Benefit: User Productivity
YES! They’re doing it!
Late Prototype to Early Production
The Sound Quality is Excellent now
This Equates to Corporate Productivity Enhancement
What we have now with the Telco:
“Carrier Grade” operation is a global Telco standard
200,000 Users, Worldwide
A Standards Body provides the following benefits:
A sample of VoIP devices available today:
VoIP deployments face some challenges:
Vendors active in the SOHO market space
(See Agreement in separate document, or at the NENA website (www.nena.org) – may be updated at the website)
Some Methods to Receive Voice over Internet 9-1-1 Calls
Best choice is for as many Voice over Internet providers as possible to use initial methods to interface to the E9-1-1 systems, via a CLEC or cable provider (or ILEC?!) for subscribers using home NPA at fixed location.
With the proper procedures, nomadic subscribers could voluntarily update location.
Examples: Packet8 / Level3, VoxPath, CoxCable, TimeWarner, MCI and AT&T CallAdvantage may be adding this method.
10 Digit numbers are a lesser alternative, and are the only known method for handling the subset of non-home NPA subscribers.
A.Establish or identify a 24x7 10 digit emergency number with the CallerID feature, and set it as a priority answer equivalent to 9-1-1 trunk calls, in the ACD, on the telephone console itself, or in some other way that fits the PSAP systems.Provides callback number in most cases, for those Voice over Internet providers using CallerID.
B.Establish a 10 digit emergency number in a central office that call forwards, with ANI of that CO number, to the central office’s 9-1-1 trunk group into the Selective Router. For both routing control to the target PSAP, and for ALI purposes, establish a fixed ALI record against that call forward ANI, that identifies the call as a Voice over Internet call from a given area. Note that this technique could be applied by VoI service provider, using different numbers for each, or across all VoI type providers in common. Does not provide ANI of the caller.
C.Establish a new SR to PSAP trunk group, with its own Routing TN at the SR, for call delivery through the new PSAP trunk group. This technique allows call delivery within the 9-1-1 trunking to the 9-1-1 CPE, provides equivalent priority of answer capability, and E9-1-1 transfer capabilities, but does not provide ANI or CallerID. Call appears as an Anonymous call, but is identifiable as a VoI call due to the dedicated trunk group.
Technical Issues Director
NENA - The Voice of 9-1-1
614-442-9110 or 800-332-3911