ADC HDSL4 Manual do Utilizador descarregar pdf (Página 31)

SSTC must set the Litespan linecode to B8ZS to ensure proper line code information is set in the Litespan system line

card. The SSIM technician is not able to make this change at the remote unit.

NOTE:

Above tests become optional ONLY if the customer waivers test. (Hard trouble cleared and customer

requests circuit for immediate use.) It must be noted in the OSSLOG with customer name and phone

number."

4.0 B8ZS LINE CODE VERIFICATION

SPECIAL NOTE: This test is not normally performed. This test is primarily for use on AMI circuits . (Errors

detected on loopback and mux line code option is suspected. )

To verify muxes are optioned correctly, the SSTC can call each CO where there is a mux to verify muxes are optioned

AMI. If that cannot be done and the SSTC or other tech suspects a mux(s) is optioned B8ZS in error, the following test

may be performed.

See flowchart in figure 1, below, to verify line code option in mux is optioned B8ZS in error. This verification is NOT a

required test.

Note: All zeros is the normal test to verify B8ZS circuit operation on circuits designed with a line code of

B8ZS. This test is primarily used when the line code is AMI and the tester needs to verify the multiplexer is not

optioned B8ZS in error, or a line code mismatch on each side of a span.

AT&T Practice ATT-TP-000-000-006

Issue 1, 08/25/06

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ADC HDSL4 Manual do Utilizador Página 31