D-Link DSL-G604T User Manual page 82

Split Line Filter
If you are instructed to use a split line filter you must install the device between the Router and the phone jack.
Use standard telephone cable with standard RJ-11 connectors. The splitter has three RJ-11 ports used to connect
to the wall jack, the Router and if desired, a telephone or telephone device. The connection ports are typically
labeled as follows:
Line - This port connects to the wall jack.
ADSL – This port connects to the Router.
Phone – This port connects to a telephone or other telephone device.
The diagram below illustrates the proper use of the splitter.
DSL-G604T Wireless ADSL Router User's Guide
Split Line Filter Installation
79