ADCP-61-743 Issue 3 September 2004

Table 3. RTAU Configuration Fields, continued

FIELD

TYPE

OPTIONS

DESCRIPTION

 

 

 

 

SIGNAL GENERATOR SETUP FIELDS, CONTINUED

DEFAULT

Pattern Type, continued

Toggle

2^15-1

215-1 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

223-1 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)

Page 19

© 2004, ADC Telecommunications, Inc.

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Image 19
ADC P-61-743 sequential 1’s. The pattern provides a, Maximum number of 0’s allowed for framed, Channel operation, Framed =

P-61-743 specifications

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