Yellow Alarm; Pll Alarm; Path Code; Line Code - ADTRAN DSU IQ User Manual

Data service unit with frame relay performance monitoring
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Chapter 10. Statistics

Yellow Alarm

If ALARM is displayed, the telco end of the T1 was out of frame
sync one or more times during the given interval.

PLL Alarm

ALARM displayed in this field usually signifies that both ends of
the T1 circuit are set to provide timing.

Path Code

Number of path code violations. Path code violations include frame
bit errors for D4 framing and superframes with CRC errors for ESF
framing.

Line Code

Number of line code violations. Line code violations include BPVs
that are not part of B8ZS code or excess zero violations.

Length Error

Number of frames received with fewer than 5 octets or greater than
4500 octets. This link violation is also reflected in the D
F
RAME

EA Violation

Number of frames received with an error in the extended address
(EA) bit field of the frame relay header.

Encapsulation Error

Number of frames received on a dedicated management DLCI that
have RFC 1490 errors. These errors are also reflected in the D
F
RAMES
If both management DLCIs are dedicated, the E
field is not applicable. See Management DLCI 1 and 2 (DLCI 1 and 2) on
page 7-5 for more information.

Inactive DLCI

Number of frames received on an inactive DLCI.

Invalid DLCI

Number of frames received on a DLCI that is out of range. The
valid DLCI range is 16 to 1007.
10-12
field.
field.
DSU IQ User Manual
ISCARD
ISCARD
E
NCAPSULATION
RROR
61200212L1-1

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