AT&T 1070 manual Important information for DSL users

Important information for DSL users

Do you receive DSL (digital subscriber line) service for high-speed Internet access through your telephone line(s) from your telephone company? If so, add either DSL splitters and/or microfilters to your installation. Without these DSL splitters and/or microfilters, your telephone service will interfere with your data reception, and your data reception will interfere with your telephone sound quality and the advanced features that work by sending data signals over Line 1 (such as intercom, hold, and line privacy).

If you have fewer than four telephones, if Line 1 can be a non-DSL line, and if there is no alarm system, you can use microfilters between each telephone and each telephone wall jack.

If your system meets any of the following three criteria, you will need DSL splitter(s) installed near where the telephone lines come into the building. You will need one for each DSL line. This usually requires a professional installer.

1)If you have more than three telephones in your system, you probably need the help of a professional installer. For each telephone line connected to more than three telephones of any type or brand, you will need to install a DSL splitter near where the phone lines come into the building. This usually requires a professional installer.

2)If you need line 1 to be a DSL line, you probably need the help of a professional installer. The telephone system information is carried on Line

1. Therefore, you must connect the same telephone line to the Line 1 jacks of all telephone sets. This telephone information and the Internet access information cannot coexist on the same telephone line without a DSL splitter that should be installed near where the phone lines come into the building. This usually requires a professional installer. Do not use microfilters on Line 1 as they interfere with telephone operation.

3)If you have an alarm system, you probably need the help of a professional installer. Alarm systems use telephone lines. This telephone system and the alarm system cannot share the same telephone line.

Other DSL information: Voice and high-speed data access can share your telephone lines because the Internet modems use high-frequency data signals and telephones use low-frequency voice signals. However, to provide high quality voice and to enable the telephones to work as an integrated system, most telephones need to have the high frequency signals removed. You will need either DSL splitters or filters to remove these signals.

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