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฀ Blinking฀a฀Port฀Light฀฀ ฀
51฀
Blinking฀a฀Port฀Light฀
The฀Blink฀Port฀Light฀function฀helps฀you฀determine฀which฀
cable฀is฀connected฀to฀which฀port฀on฀a฀network฀hub฀or฀
switch.฀This฀function฀generates฀a฀link฀pulse฀on฀pairs฀12฀
and฀36฀to฀blink฀the฀port’s฀activity฀LED.฀฀
The฀tester’s฀analog฀toner฀is฀also฀active฀when฀the฀port฀
light฀function฀is฀active.฀
To฀blink฀a฀port฀light:฀
1 Turn฀the฀rotary฀switch฀to฀DIAG.฀
2 Connect฀the฀tester฀to฀the฀cabling฀as฀shown฀in฀฀
Figure฀22.฀
3 Use฀
D฀to฀highlight฀Blink฀Port฀Light;฀then฀press฀H,฀
J,฀or฀P.฀
To฀change฀the฀blink฀rate,฀press฀K.฀
4 Check฀the฀hub฀or฀switch฀to฀see฀which฀activity฀LED฀is฀
blinking.฀The฀tester’s฀analog฀toner฀is฀on,฀so฀you฀can฀
also฀use฀a฀tone฀probe฀to฀locate฀the฀cable฀if฀necessary.฀
Note฀
The฀Blink฀Port฀Light฀function฀does฀not฀work฀
with฀non-negotiating฀hubs฀or฀with฀ports฀that฀
use฀signal฀timing฀outside฀of฀typical฀timing฀
parameters.฀฀
avv05f.eps฀
Figure฀22.฀Blinking฀a฀Port฀Light฀