ADCP-61-471 • Issue 4 • June 2000 • Section 2: Operation and Maintenance

 

 

 

 

 

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,

Toggle

2^15-1

215-1 is a 32,767-bit, pseudo-random pattern that generates a

 

 

continued

 

 

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

Used as a final confirmation that all network elements in a

 

 

 

 

Zeros

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)

2-219 © 2000, ADC Telecommunications, Inc.