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Barry

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TCG

Ed Gould

Vice President

Network Architecture & Technology

Teleport Communications Group

Two Teleport Drive

Station Island, NY 10311-1004

Tel: 718.355.2424

FAX: 718.355.4596

August 8th,1997

Brent Struthers

Illinois Commerce Commission –Staff

l60 N. LaSalle

Suite C-8OO

Chicago, I1 60601-3104

Brian Baldwin

Co-Chair-lCC Number Pooling Subcommittee

2000 W. Ameritech Dr.

Room 4C7:E

Hoffman Estates, Il, 60196

TCG wishes to state their position on two issues regarding the 847 NPA number pooling trial.

• It is our understanding that the current proposals for number pooling are only for a Proof-of-concept trial in the 847 NPA. The implementation of a number pooling concept will be subject to approval of a regulatory body, (maybe the ICC or FCC) based on an agreed upon set of success criteria for this trial. 

• • It is understood by TCG that a fall-back position (where all numbers ported to satisfy the trial \'rill revert to the original owner) will be established in the event that the trial does not meet the success criteria established for the trial.

In support of the trial effort to provide number pooling using LNP methodologies, TCG wishes to provide a possible alternative to the current approaches being investigated. The TCG alternative combines the benefits of both the pre-port and on-demand approaches. It allows the service provider who only needs one number in a rate center to have only one number downloaded, without having all thousand number reside in all SCPs. It also allows the service provider who needs all thousand numbers to have all thousand numbers downloaded. This procedure will work if the number pooling is based upon 1, 100, 1000, or 10,000 numbers. The TCG alternative is as follows:

• • 1. The service provider (SP) requiring the 1000 block of numbers (new SP) requests the numbers from the number pooling administrator. The request contains the rate center/district to be served.

    2. The administrator will select the block to be ported and will notify the current holder/owner (old SP) to notify the NPAC that this particular range of numbers within a specific code can be ported to a specified new SP.

    3. NPAC will store the numbers as reserved until the new SP requests all or part of the block;. A new SP, has the option to request all or only some numbers.

    4. Based upon the needs of the new SP, the new SP will notify NPAC to download to all LSMS databases a specific quantity of telephone numbers, from the reserved pool of numbers it is holding for that new SP.

Any question relating to this letter may be directed to either Phil Presworsky or me on 718-355-2789 or 718 355-2424. respectively.

cc Dermis McClure

• Philip Presworsky

  Fredrik Cederqvist