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Access Navigator - Release 1.8 August 2003 15-45
Diagnostics & Troubleshooting
Send DS1 Payload Pattern
An external Bit Error Rate Tester (BERT) can be located anywhere on the network or at the customer
premises as shown in the figure.
When testing is complete, the send ds1 <n> off command must be used to turn off the test pattern.
NOTE: The p2e patterns are intended only for Access Navigator loop tests and for tests
between two Access Navigators. Other test equipment will not recognize these patterns.
NOTE: This command works with ESF and D4 (SF) framing.
Figure 15-24. Send DS1 Payload Pattern
Syntax: send ds1 <n> payload
<allones|allzeros|f1in8|p2e11|p2e15|p2e23|qrss>
Field Description
n DS1 number, 1 to 32, or a range of numbers such as 2-8.
allones Send framed all-ones pattern. This can be used as a “keep alive”
signal, idle code, and in measuring the T1 power level.
allzeros Send framed all-zeros pattern. This can be used to test T1 circuits
for B8ZS clear channel capability and to find equipment
incorrectly set to AMI line code.
Note: When using an all-zeros pattern, a T1 test set (such as a
T-Berd 224 or Sunset T3) must be used to monitor for errors in
the all-zeros pattern from the Access Navigator or looped back
from a far-end network element.
f1in8 Send framed 1-in-8 pattern (also called a 1-and-7 pattern) in
which each payload byte contains the bit pattern 01000000.
(Minimal ones density test for T1 circuits with AMI coding.)
p2e11 Send 2
11
–1 pattern with a maximum of 10 consecutive zeros and
11 consecutive ones. (Minimum stress testing.)
DS1
Line
Interface
Unit
Framer
Access Navigator
Time Slot
Interchange
Code
Generator
Payload
Pattern
Command
IN
OUT
CSU
Far End
Bit Error Rate Test
DS0s
BERT
Payload
Test
Framed
Pattern