Found this on the VTECH support site regarding your model:Tip 1 of 1
Caller ID and Call Waiting ID are subscription services, available from
most local telephone service providers. You must subscribe to these
services in order for the features to work on your phone. Contact your
local telephone service provider for more information.
In addition, your caller must be calling from an area that supports caller ID.
Both you and your caller’s telephone service provider must use compatible caller ID systems.
If you subscribe to DSL service for this telephone line, DSL filters
must be plugged into EVERY phone jack that has a phone. The DSL signal
can cause caller ID disruption, static, noise and other issues on your
line. DSL filters block the high frequency DSL signals from being
transmitted to the telephone. If you are not using the DSL filters
provided by the telephone company, this will cause static/noise and
possibly caller id issues on your phones.
In most cases, we recommend you connect the plug end of the DSL
filter into the telephone jack, then connect a telephone cord between
the filter and your phone.
Please contact your service provider to obtain DSL filters and installation information.
Caller ID and Call Waiting ID may not be available for every call.
Common reasons are incompatibilities between your and your caller’s
service, transmission errors and answering calls before the ID data is
In addition if you would like to contact them or get more info on your phone, then use this link:http://www.vtechphones.com/vtechui/support/faq_index.cfm