User Manual

CableIQ฀Qualification฀Tester฀
Users฀Manual฀
22฀
Connecting฀to฀Bus฀Topologies฀
Telephone฀cables฀wired฀in฀a฀bus฀topology฀(Figure฀8)฀
connect฀the฀wall฀outlets฀in฀series.฀In฀this฀topology,฀you฀
measure฀the฀length฀from฀the฀last฀outlet฀to฀the฀
distribution฀center.฀฀
If฀you฀connect฀to฀an฀outlet฀in฀the฀middle฀of฀the฀series,฀the฀
tester฀reports฀a฀bridge฀tap.฀The฀length฀reported฀is฀the฀
length฀to฀the฀outlet,฀which฀is฀the฀patch฀cord฀length.฀The฀
tester฀cannot฀measure฀length฀past฀the฀outlet฀because฀
reflections฀from฀the฀cables฀on฀either฀side฀interfere฀with฀
measurements.฀
Tip:฀To฀quickly฀verify฀the฀wiremaps฀of฀telephone฀cabling฀
connected฀to฀a฀bridge฀tap,฀use฀the฀MultiMap฀
function฀in฀DISCOVER฀mode.฀See฀page฀46.฀
If฀you฀are฀unsure฀which฀outlet฀is฀the฀last฀in฀the฀bus,฀do฀the฀
following:฀
1 Connect฀the฀wiremap฀adapter฀or฀ID฀locator฀to฀the฀
beginning฀of฀the฀bus฀at฀the฀distribution฀center.฀
2 Connect฀the฀tester฀to฀an฀outlet.฀Turn฀the฀rotary฀
switch฀to฀DISCOVER.฀
3 If฀the฀tester฀reports฀a฀bridge฀tap,฀move฀to฀another฀
outlet.฀The฀last฀outlet฀will฀not฀show฀a฀bridge฀tap,฀and฀
will฀show฀the฀length฀to฀the฀distribution฀center.฀
About฀Qualification฀for฀VoIP฀(Voice฀Over฀Internet฀
Protocol)฀
Cabling฀that฀qualifies฀for฀VoIP฀will฀support฀the฀voice฀over฀
IP฀application;฀however,฀the฀quality฀of฀service฀may฀vary฀
depending฀on฀other฀factors.฀These฀factors฀include฀the฀
quality฀of฀the฀transmission฀system฀between฀the฀far-end฀
VoIP฀device฀and฀your฀cabling,฀the฀equipment฀used,฀and฀
the฀equipment’s฀QoS฀(quality฀of฀service)฀settings฀and฀
performance.฀
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