CG-IEIK-001 Issue 4-August 1, 2005

The purpose of Call Through Testing is to test the E911 System from both a network and a database perspective before it is available for the public's use. This phase lasts two to three months and a test code is used during this time. Because data already in the switch can be impacted when additional conversions are implemented, any pre-existing NXXs for the original City / County / Parish must be tested as well as those being added.

At the time Call Through Testing begins, both conversion and daily error rate must be 3% or lower (1% or lower by cutover).

Since a large percentage of 911 calls are generated from coin telephones, special attention is paid to these phones, such as:

• Adequate testing is performed by BST and should be performed by each ICO to be sure the address display and routing are correct for each coin telephone.
• Dialing instruction cards are placed on each coin phone in the E911 territory (each Telephone Company will place cards on telephones within their respective areas).
• Converting coin phones to "dial tone first" may be required per existing tariffs and / or PSC directives.