Patent ID: 6233225
Filing Date: 2001-05-15
Classification: H04L

Abstract:
A method for detecting either Binary 8 zero Substitution (B8ZS) or Alternate Mark Inversion (AMI) with Zero Code Substitution (ZCS) line coding mismatches on a two-way transmission channel in a transmission DS1 facility, comprising the steps:applying to the transmission channel a test pattern consisting of sets of different octets, a first octet applied a certain number of times, a second octet applied a certain number of times, and a third octet, selected in accordance with the characteristics of the transmission channel, applied a certain number of times; anddetecting if the application of the test pattern produces a constant error signature on the transmission channel having a predetermined number of errored seconds, severely errored seconds, unavailable time, and lost sync, thereby indicating a line coding mismatch.