HP OFFICEJET PRO 8500A Guía De Instalación Inicial página 30

The printer cannot send faxes but can receive faxes
•
The printer might be dialing too fast or
too soon. For example, if you need to
access an outside line by dialing "9,"
try inserting pauses as follows:
9-XXX-XXXX (where XXX-XXXX is the
fax number you are sending to). To
enter a pause, touch * and select a
dash (-).If you are having problems
sending a fax manually from a phone
that is connected directly to the printer
the printer—and if you are in the
following countries/regions—you
must use the keypad on the telephone
to send the fax:
28 Solve setup problems
Argentina
Brazil
Chile
Colombia
India
Ireland
Korea
Malaysia
Philippines
Portugal
Saudi Arabia
Spain
Thailand
Venezuela
Australia
Canada
China
Greece
Indonesia
Japan
Latin America
Mexico
Poland
Russia
Singapore
Taiwan
USA
Vietnam