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PB/NB: Tech Pub L-780059-PB/NB that is available upon customer request contains parameters from this document

for provisioning and maintenance tests. Note that anytime a test is repeated by the ATT technician at the testers

discretion is not billable to the customer. Tests that are performed by the ATT technician at the request of the customer

that are longer than standard durations are billable to the customer. The ATT technician can state in the circuit log if

there are reasons why billing does not occur.

6. Attachment 1 - DS1 SERVICE 1.544 MB/S TESTING PROCEDURES,

PROVISIONING AND MAINTENANCE

Test requirements.

1. INTRODUCTION

Below are test requirements for the provisioning and maintenance of DS1 services. These guidelines are intended to

provide a base for testing DS1 1.544 Mb/s High-Capacity Digital Services.

These guidelines incorporate the use of specific bit patterns to perform stress tests in conjunction with the conventional

QRSS tests for AMI and B8ZS line codes. Stress testing is done after basic continuity is established.

Stress testing is used as a diagnostic tool for determining the integrity of a 1.544 Mb/s DS1 facility.

B8ZS line code verification is not a standard test. B8ZS line code verification is not used on circuits that are to be

optioned B8ZS. It is used when line code mismatches are suspected. (AMI circuit is suspected of being optioned B8ZS

in error at one or more muxes.) The SSTC always has the option of phoning each CO where muxes are located to

verify the line code options. When that cannot be done, see Section 4 for flow chart to verify B8ZS multiplexer option-

ing.

Many customers perform longer test durations that range from 2 hours to 24 hours. Additional test durations may be

required depending on the test results received from our customers.

The charts below indicate the type of tests and parameters that will be taken on all HiCaps. Results will be recorded on

the WFA/C OSSCN (Circuit Notes in WFA/C) screen.

2. PROVISIONING TESTS

Provisioning tests below are separated into 4 categories:

AMI Standard (Non-HDSL) Spans in Table 1. AMI HDSL Spans in Table 2. B8ZS Standard (Non-HDSL) Spans in

Table 3. B8ZS HDSL Spans in Table 4. All test parameters tables are for use after continuity is verified. Local practice

will dictate sectionalization strategies.

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

Issue 1, 08/25/06

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