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This appendix details the electrical and mechanical characteristics of the EZ-DSL microfilter.
The EZ-DSL microfilters are used to connect telephones at the customer premises to the premises telephone wiring. The microfilters are designed to prevent interference between the router and the telephone set, as well as to reduce the effect of POTS-generated noise on the ADSL transceiver.
The EZ-DSL microfilters exist in two forms: an in-line version and a wall-mount version. The specifications for both are located in this section.
The in-line microfilters contain a plastic enclosure that houses a PCB assembly and RJ-11 female connector at either end. The top-level assembly includes a 3-inch RJ-11-to-RJ-11 pigtail for connection to the wall outlet. (See Figure C-1.)
Table C-1 lists the RJ-11 connector pinouts.
| Pin | Signal |
|---|---|
3 | Ring |
4 | Tip |
 | Caution The in-line microfilters do not provide protection against transient noise for multi-line telephones, nor do they provide protection against power surges. |
Step 1 Identify all home telephones plugged in and in service. An EZ-DSL microfilter should be installed at each home telephone.
Step 2 Unplug the telephone from the wall. Plug the telephone cord into the end of the EZ-DSL microfilter marked PHONE.
Step 3 Using the 3" telephone cord provided, plug one end of the cord into the microfilter marked WALL. Plug the other end of the cord into the telephone wall receptacle.
Step 4 After you have finished installation, verify that your telephone service works. If your telephone service does not work, disconnect the EZ-DSL Microfilter and contact your local telephone company or Cisco Systems.
The wall-mount version is a plastic plate used in conjunction with wall-mount telephones. The wall-mount microfilter installs in the place of normal telephone jack outlets where the wall-mount telephones are used.
Table C-2 lists the RJ-11 connector pinouts.
| Pin | Signal |
|---|---|
3 | Ring |
4 | Tip |
Step 1 Remove any existing wall mounts.
Step 2 Remove three inches from the outer jacket of telephone wire in the outlet box. Strip ¾ of an inch from each individual conductor.
Step 3 Loosen screws on all jack terminals. Each terminal is color coded. Connect four wires to corresponding terminal screws. Check wiring.
| Jack Labeling | Wire Color Code 1 | Wire Color Code 2 |
|---|---|---|
Red | Red | White w/ Blue Stripes |
Green | Green | Blue w/ White Stripes |
Yellow | Yellow | White w/ Orange Stripes |
Black | Black | Orange w/ White Stripes |
Step 4 Remove front panel from supplied wall jack and attach jack to the outlet box with the screws provided. The word "Top" faces upward.
Step 5 To connect the telephone, align the plug on the telephone to the newly-installed wall jack. The rivet holes on the jack should line up with the rivet holes on the back of the telephone. Move the telephone downward to lock into place.
Step 6 Place the telephone handset back on the telephone.
Posted: Tue Aug 24 19:18:15 PDT 1999
Copyright 1989-1999©Cisco Systems Inc.