AT&T Merlin 820 Service And Maintenance Manual page 102

IMPORTANT TELEPHONE NUMBERS
When you need HELP: Call your AT&T Information Systems toll-free
HELP number 1-800-628-2888. When you call the help number,
you may need the serial numbers of your system components.
If you know the nearest AT&T Information Systems representative, write
the name and telephone number here.
For the name and telephone number of the AT&T Information Systems
representative nearest you: Call the National Referral Center
toll-free number 1-800-247-1212.
If you have a service contract, write your service contract company
number here.
When you need to order parts: Call your AT&T Information Systems
toll-free number 1-800-222-PART.