B8ZS


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B8ZS

(Binary 8Zeros Substitution) An encoding method in T1 and E1 transmission that substitutes a special bit pattern for 8 consecutive zeros in order to maintain ones density. See ones density.
References in periodicals archive ?
Next, it seemed all carriers had problems testing clear-channel B8ZS and ESF.
Many carrier personnel do not know anything about B8ZS or ESF.
AT&T also offers 64-kb/s clear channel capability using B8ZS as the preferred coding, but also supports the Alternate Channel Alternate Mark Inversion (ACAMI) line coding.
ACAMI is not as efficient as B8ZS and wastes bandwidth since two DS0s are used to send one 64 kb/s of user data.
AT&T says it should only be used when the application requires clear channel and B8ZS is not available from the local exchange carrier.
Equipment capable of accepting B8ZS can be used with a DS1 signal source whether or not the source incorporates B8ZS.
Most of the test functions appropriate for tomorrow's DS1 signal are analagous to test functions performed for today's DS1 signal except that they reflect the enhancements provided by the ESF format and accommodate the clear-channel capability provided by B8ZS.
In keeping with Verilink's tradition as a pioneer of industry standards, it conforms to B8ZS and extended superframe (ESF) standards.