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Untitled - AT&T Clec Online

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APPENDIX TO ATTACHMENT 17 PERFORMANCE MEASURES BUSINESS RULES/SOUTHWESTERN BELL TELEPHONE, L.P.<br />

SBC TEXAS/CLEC JOINT PETITIONERS<br />

PAGE 49 OF 59<br />

082505<br />

71. Measurement:<br />

Common Transport Trunk Blockage<br />

Definition:<br />

Percentage of local common transport trunk groups exceeding 2%, 1% blockage.<br />

Exclusions:<br />

No data is collected on weekends or holidays<br />

Business Rules:<br />

Common transport trunk groups that reflect blocking in excess of 2% and 1% (if a<br />

separate common transport trunk group is established to carry CLEC traffic only) using a<br />

time consistent busy hour from the four most recent weeks of data.<br />

Calculation: Report Structure:<br />

(Number of common transport trunk<br />

groups exceeding 2%, 1% blocking ÷<br />

total common transport trunk groups) *<br />

100.<br />

• Common trunk groups where CLECs<br />

share ILEC trunks<br />

• Common trunk groups for CLECs not<br />

shared by ILEC<br />

Disaggregations and Benchmarks:<br />

Reported on local common transport<br />

trunk groups by state.<br />

• 3% of SBC common transport trunk<br />

groups not to exceed 2% blocking<br />

• 3% of SBC common transport trunk<br />

groups not to exceed 1% blockage (if a<br />

separate common transport trunk group<br />

is established to carry CLEC traffic<br />

only).<br />

49

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