1
This quick reference guide provides basic instructions. For additional 
installation options and complete instructions that enable you to use all 
featur
es of this phone, refer to your AT&T 1070 4-Line small business system 
with caller ID/call waiting and speakerphone user’s manual and installation 
guide.
STOP
 All DSL lines must have either filters or splitters. See the installation 
guide for more information.