Section 363-772-100
Revision 01
Page 10
TABLE 4. GLOSSARY OF PG-FLEX TERMS
Term
Definition
MARGINS
Indicates the excess signal to noise ratio, at either the COT or RT, relative to a 10
-7
Bit Error
Rate.
mn is the current margin, cr is the minimum margin since last cleared, mx is the
maximum value since cleared, and N/A means Not Available. The normal range of a typical
margin is from 22 to 6 dB.
PULSE
ATTENUATION
Indicates the attenuation of the 2B1Q pulse from the distant end. PG-Flex operates with
pulse attenuations in excess of 30 dB. This value is related to the cable pair’s 196-kHz loss.
The pulse attenuation is a more direct indication of the loop attenuation to the 2B1Q signal
than the 196-kHz loss. The normal range of pulse attenuation is from 1 to 32 dB
PPM
Indicates the relative offset of the crystal oscillator in the RT Line Unit from the COT Line
Unit’s crystal oscillator. Any value between -64 and +64 is adequate. Values outside this
range indicate out of tolerance components or excessive temperature drift of critical
components.
HDSL 24 Hour
ES (Errored
Seconds)
The number of 1-second intervals that contained at least one CRC error. This value is a
running total of the last 24 hours.
HDSL 24 Hour
UAS
(Unavailable
Seconds)
The number of seconds the HDSL loop was out of synchronization. This value is a running
total of the last 24 hours.
Copyright © 1996, PairGain Technologies, Inc. PairGain is a registered trademark, CopperOptics and PG-Flex are
trademarks of PairGain Technologies, Inc.
