AT&T 1070 manual Select Private Line in the Line Group Line Group section on

Planning your system

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•If your establishment has single-line phone jacks (page 11), you must purchase two-line adapters (model 16598, part number 89-0071-00).

If you have two or three phone lines, you will need one two-line adapter for each phone. If you have four phone lines, you will need two two-line adapters for each phone.

If you have one-line phone jacks, and four phone lines, you will also need to purchase one short telephone line (model 51920, part number 89-0052-00) or equivalent for each phone. If some phones are being wall mounted, you may need more short telephone line cords. To order them, visit our website at

www.telephones.att.com, or call 1 (800) 222-3111. In Canada, dial

1 (866) 288-4268.

•If you have DSL (digital subscriber line) service and if you have more than three telephones, you probably need to have a DSL splitter installed at your location by your DSL provider. Please see page 9 of this guide.

•Assign a different system extension number EXT XX to each system telephone (see the EXTENSION NUMBER section on page 32). We recommend assigning EXT 11 to an auto-attendant telephone. Every individual phone in your telephone system MUST be assigned a unique extension number for the intercom feature to work. If you try to assign the same extension number to a second phone, you will hear a repeating short ring and the screen displays ASSIGN NEW EXT #. See the EXTENSION NUMBER section on page 32 for directions.

•If you subscribe to Centrex service provided by your local telephone company, assign that 1080 telephone as a console (see the Centrex section on page 74 for directions).

•Your telephone probably shares its telephone lines with other extensions. Each telephone line button has LEDs (lights) to show the line status (in use, on hold, or ringing). To have an accurate line status indication, all units MUST have their Line 1 jacks connected to the same telephone line (i.e. L1), Line 2 jacks connected to the same telephone line (L2), and Line 3 jacks connected accordingly to (L3).

•System telephones have their own private telephone numbers, or several extensions can share the same number, and be part of a line group.

•Only Line 4 can be a private line. menu on that telephone (see the

Select PRIVATE LINE in the LINE GROUP LINE GROUP section on page 43).

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