ADTRAN 1200051L1 User Manual

Also see for ISU 2x64: Using Specifications

Contents

ADTRAN 1200051L1 User Manual Manual pdf 40 page image

Chapter 5.Testing26 ISU 2x64 Dual Port ISDN Service Unit User Manual 61200051L1-1DThe ISU 2x64 must be optioned for Clear Channel operation for DDSand V.54 loopbacks to take effect.NEBE/FEBEThis test reports the quality of the network connection betweenthe T-1 and the switch by viewing the number of near-end blockerrors (NEBE) and far-end block errors (FEBE) occurring on theISDN interface. An incrementing count in NEBE means the prob-lem is in the direction of the NT-1. An incrementing count inFEBE means the problem is in the direction of the switch.Software VersionThis test determines the software version in use on the ISU 2x64.Loopback Both DTEsChoosing this option loops back both DTE ports simultaneously.Test 2047 BothChoosing this option is similar to Test Remote, except both portsare tested simultaneously.Press Cancel to exit any of these options.