Adtran 1200305L1 Manual Do Utilizador

ATLAS 550 System Manual

Section 4, User Interface Guide

61200305L1-1F

© 2002 ADTRAN, Inc.

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Sends loopback code to remote CSU. The following options are available:

Test pattern to be transmitted out the port. The following options are available:

Displays current status of T1 tests including information regarding loopbacks and test patterns. When 
displaying test pattern status, the display string is composed of pattern sync status and errored seconds.

Clears error counters on test pattern results menu.

Injects errors into transmitted test pattern.

ESF/D4

Full 1.544 Mbps loopback of the signal received from the network 
(metallic loopback).

ESF

Full 1.544 Mbps loopback of the signal received from the network. 
Initiated through loopback activation transmission over the facility 
data link (FDL).

ESF

1.536 Mbps loopback of the payload data received from the network 
maintaining bit-sequence integrity for the information bits by 
synchronizing (regenerating) the timing. Initiated through loopback 
activation transmission over the facility datalink (FDL).

ESF/D4

Full 1.544 Mbps loopback of the signal received from the network 
after passing through the T1 framer of the remote unit.

Framed ones

Framed zeros

Pseudo-random pattern with suppression of excess zeros

No sync.

Sync has been lost.

Pattern is synchronized.

Number of seconds with at least one bit error.