AT&T 984 user manual DSL users

984CIB_(Rev3)28.04.06 4/28/06 6:28 PM Page 4

Before you begin

DSL users

Connecting a DSL line to L1/L2 may interfere with the advanced features of this telephone, (such as intercom, hold, and line privacy,) which work by sending data signals over line 1. These data signals are sent at some of the same frequencies as those used by your DSL service.

Also, DSL lines usually have microfilters, which keep the DSL signals from interfering with your telephone's sound quality. These same microfilters will also block the data signals that this telephone system uses to support some telephone system features. Therefore, the advanced features of this phone may not work properly when DSL microfilters are installed on L1/L2 of your phone system. However, you can use a DSL splitter to prevent these problems.

For only one or two DSL lines, install it/them into L3/L4 on the back of the phone.

If your system will only use two or three phone lines, plug a single non-DSL telephone line into L1/L2. (Turn off the L2 line usage lights.) Be sure to use the microfilter(s,) which were probably provided when DSL was installed, on lines 3 and/or 4 if the lines have DSL, to protect the sound quality.

If you have two telephone lines, one of which is DSL, which both appear at a single wall jack, use a Triplex adapter to separate the lines at the wall jack. Call 1 (800) 222-3111if you need help doing this.

If you must install a DSL line into L1/L2 on the back of the phone, use a DSL splitter.

Lines 1 and 2 share a telephone jack, so if you need to install a DSL line for telephone line 1 or line 2, you will need additional equipment to avoid interference. Any telephone line connected to L1/L2 cannot have a microfilter. It must have a DSL splitter. Use a dual line DSL splitter or a two-line DSL filter. Call 1 (800) 222-3111if you need help doing this.

Installation, by your DSL service provider or other professional, of a DSL splitter (not a microfilter) 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.

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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