ACCEPTANCE TESTING AND COMMISSIONING. HER acceptance tests are in accordance with ITU recommendations M.2100 and M.2101. Before handing over the circuit to the customer, a 24 hours Bringing-Into- Service (BIS) test will be performed. This BIS test is performed with a test equipment (TE) at each end. These TE are connected at the demarcation points of the service (including all cabling). For STM-1/VC4 services, the errors and alarms of the STM-1 interconnecting sections are measured, as well as of the VC-4 path. Following parameters are measured: Errored Seconds(ES) Severely Errored Seconds (SES) Unavailable Seconds (US) In addition the round trip delay is measured. The following values are taken for the BIS performance limits of the VC4 path, based on 2% allocation (Backbone service): ------------------------------------------------------------------------- S1 S2 ------------------------------------------------------------------------- Allocation ES SES ES SES ------------------------------------------------------------------------- LON-PAR 2% 9 0 26 3 ------------------------------------------------------------------------- FRA-PAR 3% 16 0 36 4 ------------------------------------------------------------------------- FRA-LON 3% 16 0 36 4 ------------------------------------------------------------------------- If the measurement indicates values below S1, the BIS is considered successful and the path accepted. If the measurement indicates values between S1 and S2, the test is extended to 7 days (thresholds x 7). If the measurement indicates values above S2, the BIS is not successful and corrective action is taken.
ACCEPTANCE TESTING AND COMMISSIONING. HER will coordinate with the Participating Railway-specified contact persons all acceptance testing activities. Depending on the contracted service, this may include: o local access network BIS testing o HER end-to-end service BIS testing
