BEFOREYOU BEGIN
DSL Users
Installation of a DSL splitter and an AT&T Z800A filter is required to use the advanced features of this telephone if you have DSL (Digital Subscriber Line) service.
Set-Up for DSL Users
If you are a DSL (Digital Subscriber Line) customer, you may experience interference with the advanced features of this telephone. Certain features of this phone (e.g., intercom, hold, line privacy, etc.) work by sending a data signal using Line 1. This data signal is sent at some of the same frequencies as those used by your DSL service. Microfilters are used to block the high frequency DSL signals from being transmitted through and interfering with your telephones. These same microfilters that may have been installed for your DSL service will also block the data signals between your system phones . Therefore, some features of this phone may not work properly when DSL filters are installed in your building. This problem can occur even if the DSL line is not one of the lines used by the phone system. If you use the microfilters that your DSL service provider may have supplied when you activated DSL service with this phone, some of the phone features will not work. Once the DSL splitter (described below) is installed, you will no longer experience interference.
Installation, by your DSL service provider or other professional, of a DSL splitter (not a"microfilter") AND an AT&T Z800A Isolation filter as close as possible to the "protection block" or "network interface" (where the telephone line enters the house) may resolve DSL interference. (It may be necessary to use a DSL splitter intended for outdoor use.) A DSL splitter allows the data and voice signals to use the same telephone line without interfering with each other. An AT&T Z800A filter isolates the splitter from your phone system and reduces interference with the signals used by the system phones to communicate with each other.
You can obtain an AT&T Z800A filter at no charge by calling 800 222- 3111. You will also receive a diagram showing the proper installation of the AT&T Z800A filter with a DSL splitter, DSL modem and your system phones. AT&T cannot supply the DSL splitter.
Please contact your DSL service provider or professional contractor for details about obtaining and installing a DSL splitter. Your DSL service provider may require you to bear any installation costs. AT&T and the manufacturer of this product have no affiliation with your DSL provider and the type or quality of services they offer. Installation must be performed at your own expense and AT&T cannot troubleshoot or provide installation support.
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