Nortel 8300 Troubleshooting Manual page 102

102 Troubleshooting tools
Field
NormalCableLength
Phy Type
Cable Status
PairnStatus
Pairn ErrLength
Copyright © 2007, Nortel Networks
.
Description
The measured length of a cable that is OK and
plugged into a good port at the other end. Because
such a port has no reflection, the normal cable length
cannot be determined with great accuracy therefore,
the value of this field is an enumeration. The cable
length can be + or - 1 M. The meanings of this value
are:
• cableLT50M(1) cable length = less than 50 meters
• cable50M80M(2) cable length = between 50
meters and 80 meters
• cable 80M110M(3) cable length = between 80
meters and 110 meters
• cable 110M140M(4)cable length = between 110
meters and 140 meters
• cable GT140M(5) cable length = greater than 140
meters
• cableUnknown(6)
The type of the Phy, expressed as a speed. The
meanings of this value are:
• phy100M(1) = 10/100 port
•
phy1000M(2) = 1 gigabit port
• phyUnknown
Status of the cable as a whole. The status of a cable
is in a sense, a summation of the status of its pairs. If
all of the pairs are normal, then the cable is normal.
If the cable consists of zero or more normal pairs and
one or more open pairs, then the cable is considered
open. If the cable consists of shorted pairs and
normal pair, then the cable is considered shorted. Any
combination of open and shorted pairs is considered
FAILED.
Indicates status of the twisted pair.
Where n is a number that specifies the cable pair.
The length of a twisted pair, as measured by Time
Domain Reflectometry (TDR).
n is a number that specifies the cable pair.
This measurement can only be done if the pair is
open or shorted. Therefore, this is an "Error" length.
If the pair is good and properly terminated there is
no reflection to measure.
Nortel Ethernet Routing Switch 8300
Troubleshooting
NN46200-704 01.01 Standard
4.0 29 October 2007