16
Configuring an ADSL WAN Interface Card on Cisco 1700 Series Routers
OL-3317-03
Using POTS Splitters and Microfilters
Figure 10 Customer-Installed Splitter
Router and Telephone Using Separate Telephone Lines
This scenario is described below and illustrated in Figure 11.
• The telephone company has provisioned a single copper pair to be used exclusively by the router
with an ADSL 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 11 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
to telco (ADSL
or G.SHDSL)
Line 2
to telco (POTS)
Actual wall of building
39197
Cisco router