AT&T EL51209, EL51359 User Manual


Appendix C
My caller ID isn’t 
• Caller ID is a subscription service. You must subscribe 
to this service from your local telephone company for 
this feature to work on your phone.
• Your caller must be calling from an area that supports 
caller ID.
• Both you and your caller’s telephone companies must 
use caller ID compatible equipment.
• If you subscribe to high-speed Internet service (digital 
subscriber line - DSL) through your telephone lines, 
you must install a DSL filter between the telephone 
base and the telephone wall jack (see page 4). The 
filter prevents noise and caller ID problems caused by 
DSL interference. Please contact your DSL service 
provider for more information about DSL filters.
System does not 
receive caller ID 
when on a call.
• Make sure you subscribe to caller ID with call waiting 
features provided by your local telephone company. 
Caller ID features work only if both you and the caller 
are in areas offering caller ID service, and if both 
telephone companies use compatible equipment.