MicroScanner Series
Cable Verifiers
Users Manual
32
Connecting to Telephone Networks Wired in Bus
Topologies
Telephone cables wired in a bus topology (Figure 21)
connect the wall outlets in series. In this topology, you
measure the length from the last outlet to the wiremap
adapter.
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.
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 and run the twisted pair
cable test.
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.
W
Caution
Do not use multiple far end adapters in star or
bus topologies. Doing so causes incorrect
wiremap results.
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