DSL Interface Cards
Using POTS Splitters and Microfilters with an ADSL-over-POTS WIC (WIC-1ADSL)
17
OL-12846-01
Figure 77 Customer-Installed Splitter
Router and Telephone Using Separate Telephone Lines
This scenario is described below and illustrated in Figure 78.
• The telephone company has provisioned a single copper pair to be used exclusively by the router
with a DSL interface card and a separate copper pair to be used exclusively by the telephone (POTS)
service; therefore, neither a POTS splitter nor a microfilter is needed.
• The microfilter is optional; it should be installed only if it improves telephone call quality.
Figure 78 No Splitter, Optional Microfilter
Splitter
To telco
Optional telephones,
if supported by your telco
Required microfilter
Actual wall of building
39275
Cisco router
Optional
microfilters
Optional microfilter
Line 1
to telco (ADSL
or G.SHDSL)
Line 2
to telco (POTS)
Actual wall of building
39197
Cisco router
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