Certification and Acceptance of Digital Telephone Switching System


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Certification and Acceptance of Digital Telephone Switching System

8.1 Cutover and Provisional Acceptance Tests

Cutover is defined as the date on which an exchange and supporting offered equipment is put into service to carry live, revenue-bearing traffic. A successful cutover is defined as having occurred when the offered equipment has been in operation for seven (7) consecutive days after cutover, generally in accordance with the technical specification and without a major fault condition. A major fault condition is defined as one which causes a disruption of operation affecting more than one percent (1%) of subscriber lines or trunks for a period in excess of one (1) hour, due to improper, functioning of the offered equipment.

Following a successful cutover, provisional acceptance tests shall be conducted, by the manufacturer/contractor to demonstrate to Saudi Aramco that the offered equipment is performing in compliance with this technical specification.
As part for these tests, light-load and busy-hour load tests shall be conducted to demonstrate that test calls or live traffic calls selected for test purposes shall be properly switched to terminations with less than 0.01% faults under no load and less than 0.5% faults under busy-hour loads. Full functional tests, as specified in section 7.5 above, shall be conducted in such a way as not to interfere with revenue-bearing traffic.
Upon successfully completing the provisional acceptance tests, the offered equipment shall qualify for provisional acceptance following a period of at least thirty (30) days of continuous system operation without any major fault conditions. The results of provisional acceptance tests shall be documented and submitted to Saudi Aramco for approval, prior to the issuance of the certificate of provisional acceptance. The manufacturer/contractor shall be responsible for maintaining the equipment, including the replenishment of spare parts as required, during the period prior to the issuance of the certificate of provisional acceptance.

8.2 Final Acceptance Tests

Final acceptance tests shall occur no earlier than ten (10) months following the issuance of the certificate of provisional acceptance. Tests, similar to those conducted during provisional acceptance testing, shall be performed to verify that the technical specifications are being met. Full functional tests shall be performed with all types of calls tested. No more than 0.5% faults under busy-hour load conditions will be acceptable.

The vendor of the Central Office (CO) equipment and associated products is required to certify that the equipment delivered meets ITU-T specifications. If and where applicable, the vendor shall also certify that the equipment shall be modified to comply with future enhancements of ITU-T Recommendations through upgrade or replacement.
Final acceptance of equipment shall occur after the above conditions have been met, provided that the equipment has experienced no major fault condition for a period of 12 months, during the warranty period.

8.3 Trouble Log

A system log shall be maintained to record all system malfunctions and the actions taken to restore proper functioning during the warranty period.

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