Adtran 606 Benutzerhandbuch

Section 4  User Interface Guide

Total Access 600 Series System Manual

 110

© 2004 ADTRAN, Inc.

61200624L1-1B

Use these menus to view the 

,

, and to 

 for the PVC Protocol.

Number of AAL5 CRC Errors.

Number of AAL5 Reassembly Timeouts.

Number of AAL5 Too Long Frames.

Clears all recorded statistics and returns all counters to 0.

ATM Adaptation Layer 2 statistics is used to provide error information on voice traffic. This menu 
displays 

, 

, 

, 

, 

, 

, and 

.

A CRC code (used for data integrity checks) is contained in the last byte of an AAL2 header. A 
received HEC error could result in dropped packets and poor voice quality.

A single bit of the AAL2 header is used as a sequence bit and toggles from 1 to 0 with each 
successive transmitted cell. If two cells are received back to back with the same sequence bit, a 
sequence error is denoted.

Indicates that the Total Access 600 Series received voice packets that were out of sequence 
according to the voice sequencing bits. The Total Access 600 Series does not drop these packets, 
but the error is logged because invalid sequence numbers were received.

Indicates that the channel identifier (used for identifying voice calls in the ATM cell) was not 
valid.

The User Indication designates the signaling bit pattern for PCM/ADPCM and identifies the 
packet as Type 1 (voice) or Type 3 (signaling). This error indicates the Total Access 600 Series 
received an incorrectly formatted UUI.

Indicates an EOC cell was received with a voice designation.