Re: (ASCEND) The meaning of " far end block error "

[Tim Basher <basher@ces.cwru.edu>]

> When I used command 'open e1 1 1' and 'e1-stats',
> the display showed me some errors.
> One of them is far end block error.
> On our MAX TNT,  556 far end block errors occured in 3 hours.
> What's the far end block error and Why happen ?

The output of the "E1-Stats" command is described in the "MAX TNT Command
Reference" chapter of the "MAX TNT Reference Guide".

  Field          Description
  Far end        How frequently the remote end reported errors in E1 frames
  block errors   transmitted by the MAX TNT.

There is a some additional information in the "MAX TNT Glossary".

  Far-End Block Error 
  See FEBE

  FEBE 

  Far-End Block Error. FEBE is a signal the remote end sends to indicate that
  it has received DS3 or E1 frames with either Framing Errors (FERR) or C-bit
  Parity Errors (CPERR). A block error is detected each time the calculated
  checksum of the received data does not correspond to the control checksum
  transmitted in the successive superframe. One block error indicates that one
  superframe has not been transmitted correctly. No conclusion with respect to
  the number of bit errors can be drawn from the block-error counter.
  Compare with NEBE. See also CPERR, DS3 line, FERR. 

It sounds like you should have the provider of the E1 line check for problems
with noise, line build out, active repeaters, or other sources of errors for
signals.

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