VTEL HS 2000, Руководство системного администратора

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HS 2000 System Administrator’s Handbook Chapter 4. Monitoring System Operation
H.221/HDLC 93
FAW Errors
The number of times the receive synchronization module has detected a
bad frame alignment word (FAW). This value can indicate the quality of
the connection. The value can be any number between 0 and 225.
BAS Errors
The number of times the bit allocation signal (BAS) manager has detected
a corrupted BAS that the BAS CRC cannot correct.
The BAS manager is the second level of synchronization in the H.221
standard. Once multiframe alignment has been achieved, the BAS
manager begins to exchange capabilities with the other end of the
connection. If the BAS Manager detects an erroneous capability or
command, it attempts to correct the value (for example, if the value
receive does not match the CRC received). If it is unable to correct the
value, it increments this counter.
This value can indicate the quality of the connection. The value can be
any number between 0 and 255.
Xmit Err Count
The number of times the Receive Frame Master has detected CRC errors
from the other end of the connection.
This value is incremented whenever the E field of the frame alignment
word is set when the other end has detected a CRC error. A value appears
only when the CRC’s Active flag is On for an active port.
This value can indicate the quality of the connection. The value can be
any number between 0 and 255.