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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 phones at the customer premise to the premise phone wiring. The microfilters are designed to prevent interference between the modem and the phone 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 the following sections.
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.
The RJ-11 connector uses the following pin-outs.
| Pin | Signal |
|---|---|
3 | Ring |
4 | Tip |
 | Warning The in-line microfilters do not provide protection against transient noise for multi-line phones. |
1. Identify all home telephones plugged in and in service. An EZ-DSL microfilter should be installed at each home telephone.
2. Unplug the telephone from the wall. Plug the telephone cord into the end of the EZ-DSL microfilter marked PHONE.
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.
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 phones. The wall mount microfilter installs in the place of normal phone jack outlets where the wall mount phones are used.
The RJ-11 connector uses the following pin-outs.
| Pin | Signal |
|---|---|
3 | Ring |
4 | Tip |
1. Remove any existing wall mounts.
2. Remove three inches from the outer jacket of telephone wire in the outlet box. Strip ¾ of an inch from each individual conductor.
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 |
4. Remove front panel from supplied wall jack and attach jack to the outlet box with the screws provided. The word "Top" faces upward.
5. To connect the phone, 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 phone downward to lock into place.
6. Place telephone handset back on phone.
Posted: Wed Jun 9 08:34:55 PDT 1999
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