Packet communication card
First Claim
1. A packet communication card that is inserted into a data terminal equipment to be used for connection to a portable digital telephone, wherein said card comprises:
- a COM port for implementing packet communication;
a signal line for receiving information on the state of communication of said portable digital telephone; and
means for selectively changing the power source of said portable digital telephone from a battery of said portable digital telephone to at least one other power source, wherein the changing to the at least one other power source is based on the state of communication of said portable digital telephone received by said signal line.
6 Assignments
0 Petitions
Accused Products
Abstract
A packet communication card enables consumption of a battery for a portable digital telephone to be reduced by changing supply power for the portable digital telephone in accordance with a state of the portable digital telephone. The pocket communication card which is connected to the portable digital telephone, and which is provided with a COM port necessary for implementing packet communication, is inserted into a data terminal equipment to be used. There is reduced consumption of the battery for the portable digital telephone by selecting to be changed one power source which is a power source of power sources being at least more than one for supplying power to the portable digital telephone in accordance with state of communication of the portable digital telephone. A switch implements change of supply power.
27 Citations
16 Claims
-
1. A packet communication card that is inserted into a data terminal equipment to be used for connection to a portable digital telephone, wherein said card comprises:
-
a COM port for implementing packet communication;
a signal line for receiving information on the state of communication of said portable digital telephone; and
means for selectively changing the power source of said portable digital telephone from a battery of said portable digital telephone to at least one other power source, wherein the changing to the at least one other power source is based on the state of communication of said portable digital telephone received by said signal line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
Specification