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ADCP-61-471 • Issue 4 • June 2000 • Section 2: Operation and Maintenance
2-219
© 2000, ADC Telecommunications, Inc.
DLP-570
Page 9 of 18
Table 570-1. RTAU Configuration Fields, continued
FIELD TYPE OPTIONS DESCRIPTION DEFAULT
SIGNAL GENERATOR SETUP FIELDS, continued
Pattern Type,
continued
Toggle 2^15-1 2
15
-1 is a 32,767-bit, pseudo-random pattern that generates a
maximum of 14 sequential 0’s and 15 sequential 1’s. The
pattern provides a maximum number of 0’s allowed for
framed, non-B8ZS testing. The pattern does not meet the
minimum 1’s density requirement.
2^23-1 2
23
-1 is a 8,388,607-bit. pseudo-random pattern that
generates a maximum of 22 sequential 0’s and 23 sequential
1’s. The pattern exceeds excess 0’s and does not meet the
minimum 1’s density requirements for T1 applications.
All Ones Test of T1 span line. The all-1’s pattern causes the span line
repeater to consume the maximum amount of power. If the
current powering the span line is low, transmission errors
may occur due to the inter-symbol interference resulting
from the inability of a weak repeater power supply to
develop the energy necessary to support the transmission of a
long sequence of 1’s.
(Framed) All
Zeros
Used as a final confirmation that all network elements in a
circuit are properly optioned with B8ZS for clear channel
operation. The framed all 0’s pattern consisting of a frame bit
followed by an all 0’s payload, will only be applied to circuit
optioned with B8ZS for clear channel operation.
3 in 24 Used to determine the ability of network equipment to function
properly when transporting signal sequences containing both a
maximum of 15 consecutive 0’s during periods of minimum
overall pulse density.
• Unframed = 1000 1000 1000 0000
0000 0000 1000 1000
• Framed = 0100 0100 0000 0000
0000 0100 0100 1000
2 in 8 Used in conjunction with the 1-in-8 pattern. Useful when
performing test to reveal the presence of incorrectly-optioned
AMI or B8ZS equipment. Use of the 2-in-8 pattern will
confirm the circuits ability to support error-free transmission.
• Unframed = 0100 0010 0100 0010
• Framed = 0100 0010 0100 0010
(continued)