Chapter 3. Operation61200.076L2-1 TSU 600 User Manual 8 1*Figure 3-21Test Pattern Results DisplayES The number of seconds with at least 1bit error.BES The number of seconds with morethan 1 bit error and less than 320.SES The number of seconds with morethan 320 bit errors.*SYNC Indicates if pattern sync is, (yes) or isnot, (no) valid. The asterisk (*)indicates if pattern sync has been lostsince the start of testing.Results can be cleared by pressing Clear (shift 9).The results are accumulated until the test pattern is setto None or Cleared.The use of TST DS0s for testing can be very useful,particularly in Fractional T1 applications. An end to endtest can be run on the Fractional DS0s by 1) setting forMap B the TST in the same DS0 as used by Map A toreceive data from an Nx56/64 port and 2) by looping the farend using a V.54 loopback code on the Nx56/64 port. Inaddition, a single DS0 can be used for continuous testingwhile other DS0s are passing normal data. This will alsoprovide an end to end check on the entire link. Set each endto send QRSS in TST DS0s (using 1 DS0) and occasionallyview the results on the Pattern Result menu selection.
