Connecting To Bus Topologies - Fluke CableIQ User Manual

CableIQ Qualification Tester
Users Manual

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.
22
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.