Appendix E Configuration MenusIPmux-1/1EInstallation and Operation Manual

 

 

Table E-27. E1/T1 Statistics Parameters

 

 

 

Alarm

Failure

Comments

 

 

 

LOS

Loss of Signal

Sync LED Off

 

 

For T1: A second during which 192 contiguous pulse positions have no

 

 

pulse of either positive or negative polarity (signal is more than 30 dB

 

 

below nominal amplitude

 

 

For E1: A second during which 255 contiguous pulse positions have no

 

 

pulse of either positive or negative polarity

 

 

 

LOF

Loss of Frame

Sync LED Off

 

 

For E1/T1: A second during which an OOF error persists for 2.5 seconds

 

 

and no AIS error (see below) is detected

 

 

 

LCV

Line Code

Line Code Violation

 

Violation

For T1: A second during which BPV (Bipolar Violation) or EXZ errors have

 

 

 

 

occurred

 

 

For E1: A second during which two consecutive BPVs of the same polarity

 

 

are received

 

 

BPV is the occurrence of a pulse with the same polarity as the previous

 

 

pulse.

 

 

EXZ is the occurrence of a zero string greater than 15 for AMI or 7 for B8ZS.

 

 

Complies with ITU-TI.431, O.161, G.775 and G.821 standards.

 

 

 

Rcv RAI

Remote

Sync LED flashes

(Yellow

Alarm

For E1/T1, a second during which tan RAI pattern is received from the far

Alarm)

Indication

end when the far-end framer enters a RED state (Loss of Frame)

 

 

 

 

 

AIS

Alarm

Sync LED is Off

 

Indication

For T1: A second during which an unframed “all 1” signal is received for

 

Signal–

 

3 milliseconds

 

Received

 

 

 

from User

For E1: A second during which a string of 512 bits contains fewer than

 

 

three zero (0) bits

 

 

 

FEBE

Far End Block

Number of seconds in which the FEBE indication is received from the remote

 

Error

E1 device

 

 

(For E1 MF-CRC4 only)

BES

Bursty Errored

 

Seconds

 

(Errored

 

Second

 

Type B)

Number of seconds with from two to 319 CRC error events with no AIS nor SEF (Framing Bit Errors) error detection

Complies with AT&T TR-62411 and TR-54016 standards Not applicable if Line Type is set to Unframed (T1-ESF or E1-CRC4 modes)

E-42 Performance Monitoring

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Cisco Systems IPMUX-1E operation manual Table E-27. E1/T1 Statistics Parameters, Alarm Failure Comments