Cisco 1700 Series Configuring page 15

Telephone Company-Installed Splitter
This scenario is described below and illustrated in
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Figure 9
Customer-Installed Splitter
This scenario is described below and illustrated in
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OL-3317-03
The telephone company has provisioned a single copper pair to be used by both the telephone
(POTS) service and the router with an ADSL card, so a POTS splitter must be installed.
The splitter is installed by the telephone company on the customer premises. This type of splitter is
also referred to as a network interface device (NID).
The router and telephone are on separate lines (twisted pair) to the splitter.
The router and telephone share the same telephone line (twisted pair) to the telephone company.
Telephone Company-Installed Splitter
Splitter (NID)
To telco
Cisco router
The telephone company has provisioned a single copper pair to be used by both the telephone
(POTS) service and the router with an ADSL card, so a POTS splitter must be installed.
The splitter is installed by customer on the customer premises.
Router and telephone are directly connected to the splitter, which is connected to the telephone line.
Router and telephone share the same telephone line (twisted pair) to the telephone company.
For optional telephones connected through the splitter, microfilters are optional. They should be
installed only if they improve telephone call quality.
For telephones connected directly to the telephone line, microfilters are required.
Figure 9.
Actual wall of building
Optional
microfilters
Figure 10.
Configuring an ADSL WAN Interface Card on Cisco 1700 Series Routers
Using POTS Splitters and Microfilters
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