Appeal No. 96-0651
Application No. 08/087,164
The invention pertains to a system for downloading
updated operating code over a phone line for updating the
operating code of a reprogrammable modem.
Representative independent claim 1 is reproduced as
follows:
1. A system for updating operating code in a
reprogrammable modem the updated operating code being
downloaded from a remote computer via telephone lines,
comprising:
a field-upgradable modem having;
communications interface means connected for
communicating with a local host computer and operable for
transferring data between the local host computer and the
modem;
telephone line interface means for connection to the
telephone line;
control means connected to the telephone line
interface means and the communications interface means for
executing existing operating code to control the modem;
memory means connected to the control means for
storing the existing operating code and for storing a boot
program;
the control means further operable for executing the
boot program to receive updated operating code packets from
the local host computer, for checking the validity of the
packets and replacing the existing operating code in the
memory means with the updated operating code received by the
communications interface means from the local host computer;
2
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