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ADCP-61-743 • Issue 3 • September 2004
Page 19
© 2004, ADC Telecommunications, Inc.
Table 3. 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)