ADTRAN ISU 2X64 user manual Nebe/Febe, Software Version, Loopback Both DTEs, Test 2047 Both

Chapter 5.Testing

The ISU 2x64 must be optioned for Clear Channel operation for DDS and V.54 loopbacks to take effect.

NEBE/FEBE

This test reports the quality of the network connection between the T-1 and the switch by viewing the number of near-end block errors (NEBE) and far-end block errors (FEBE) occurring on the ISDN interface. An incrementing count in NEBE means the prob- lem is in the direction of the NT-1. An incrementing count in FEBE means the problem is in the direction of the switch.

Software Version

This test determines the software version in use on the ISU 2x64.

Loopback Both DTEs

Choosing this option loops back both DTE ports simultaneously.

Test 2047 Both

Choosing this option is similar to Test Remote, except both ports are tested simultaneously.

Press Cancel to exit any of these options.

26 ISU 2x64 Dual Port ISDN Service Unit User Manual 61200051L1-1D