Portable transceiver and electronic serial number transfer system therefor

Claim 2

A portable transceiver, as claimed in Claim 1, further comprising: external antenna connecting means and antenna switch means housed in a casing so that, when said portable transceiver is carried on a vehicle, an external antenna installed on the vehicle can be connected in plane of said antenna means to said radio frequency signal processing means; telephone transmitter means for supplying speech signals to be transmitted to said transmitting portion; and telephone receiver means for receiving the output of said receiving portion.

Claim 3

A portable transceiver, as claimed in Claim 1, wherein a specific part of said ESN is a manufacturer's ID number for identifying the manufacturer of said transceiver.

Claim 4

A portable transceiver, as claimed in Claim 1, wherein a unique MSN, not to be transferred to the EEPROM of said other portable transceiver, is stored in the EEPROM.

Claim 5

An ESN transfer system comprising: first and second portable transceivers each constituting a mobile unit of a car telephone system, and an ESN transfer unit, wherein: each of said first and second portable transceivers involves first antenna means for converting a radio frequency signal sent out from the base station of said car telephone system into a receive signal and converting a transmit signal into a radio frequency signal to be transmitted to said base station, and first radio frequency signal processing means further involving a receiving portion for receiving and processing said receive signal, a transmitting portion for generating said transmit signal, and a diplexer for separating and combining said receive signal and said transmit signal; each of said first and second portable transceivers involves first and second control and operation means further involing first and second EEPROM's for respectively storing first and second MSN's each having a unique content and first second ESN's to be used by said base station for identifying the calling party and the called party; first and second logic control circuits for reading and writing said first and second ESN's and controlling calls and communication to and from said base station by controlling said first and second radio frequency signal processing means; and first and second external connector means, each housed in a casing and connected to said first or second control and operation means to constitute an interface with external units; wherein: said ESN transfer unit comprise ESN reading means for reading said first ESN out of said first EEPROM via said first external connector means; judging means for judging whether or not a specific part of said first ESN read out by said ESN reading means is correct; transfer means for transferring, only when the specific part of said first ESN is judged correct, said first ESN read out by said ESN reading means to said second EEPROM via said second external connector means, and rewriting the content of said second ESN stored in said second EEPROM to that of said first ESN; and rewriting means for rewriting, when the specific part of said first ESN is judged correct, the specific part of the first ESN stored in said first EEPROM to a content which is to be judged incorrect.

Claim 6

An ESN transfer system, as claimed in Claim 5, wherein the specific parts of said first and second ESN's are manufacturer's ID numbers.

Claim 7

An ESN transfer system, as claimed in Claim 5, wherein said first and second MSN's are prohibited from being transferred.

Claim 8

An ESN transfer system, as claimed in Claim 5, wherein each of said first and second portable transceivers further involves external antenna connecting means and antenna switch means housed in a casing so that, when said portable transceiver is carried on a vehicle, an external antenna installed on the vehicle can be connected in place of said antenna means to said radio frequency signal processing means; telephone transmitter means for supplying speech signals to be transmitted to said transmitting portion; and telephone receiver means for receiving the output of said receiving portion.

Claim 9

An ESN transfer system, as claimed in Claim 5, wherein each of said first and second control and operation means further involves a keyboard connected to said first and second logic control circuits to enable the user of said first or second portable transceiver to enter a control signal; LCD display means for displaying characters and signs under the control of said first and second logic control circuits; and interface circuit means for interfacing said first and second logic control circuits with said first or second external connector means.

Claim 10

An ESN transfer system, as claimed in Claim 5, wherein the connection between said first external connector means and said ESN reading means and that between said second external connector means and said transfer means are provided by a serial bus each.

Claim 11

An ESN transfer system, as claimed in Claim 8, wherein said ESN transfer unit involves an operation portion for instructing said ESN reading means to transfer said first ESN.

Claim 12

An ESN transfer system, as claimed in Claim 5, wherein said ESN transfer unit involves first memory means for temporarily storing said read-out first ESN, and second memory means for storing in advance said specific part of said first ESN, which is to be judged correct, wherein: said judging means checks the specific part of the first ESN stored in said first memory means with said specific part of said first ESN stored in advance in said second memory means, which is to be judged correct, and judges whether or not the specific part of said first ESN stored in said first memory means is correct.

Claim 13

An ESN transfer unit comprising: ESN reading means for reading, via a first external connector housed in the casing of a first portable transceiver in a car telephone system, a first ESN stored in a first EEPROM mounted on said first portable transceiver and used for identifying the calling party and the called party; judging means for judging whether or not a specific part of said first ESN read out by said ESN reading means is correct; transfer means for transferring, when the specific part of said first ESN is judged correct, said first ESN read out by said ESN reading means to a second EEPROM involved in a second portable transceiver in said car telephone system via a second external connector housed in the casing of said second portable transceiver; and rewriting means for rewriting, when the specific part of said first ESN is judged correct, the specific part of the first ESN stored in said first EEPROM to a content which is to be judged incorrect.

Claim 14

An ESN transfer system, as claimed in Claim 13, wherein said ESN transfer unit involves an operation portion for instructing said ESN reading means to transfer said first ESN.

Claim 15

An ESN transfer unit, as claimed in Claim 14, further involving first memory means for temporarily storing said read-out first ESN, and second memory means for storing in advance said specific part of said first ESN, which is to be judged correct, wherein: said judging means checks the specific part of the first ESN stored in said first memory means with said specific part of said first ESN stored in advance in said second memory means, which is to be judged correct, and judges whether or not the specific part of said first ESN stored in said first memory means is correct.

Claim 16

An ESN transfer system, as claimed in Claim 13, wherein the connection between said first external connector and said ESN reading means and that between said second external connector and said transfer means are provided by a serial bus each.

Claim 17

An ESN transfer unit for transferring a first ESN, stored in a first EEPROM of a first portable transceiver in a car telephone system and used for identifying the calling party and the called party, to a second EEPROM of a second portable transceiver in said car telephone system, comprising: input/output interface means respectively connected, via first and second external connectors housed in the casings of said first and second portable transceivers, to the logic control circuits of said first and second portable transceivers each involving said first and second EEPROM's, and respectively interfacing with said first and second portable transceivers, and CPU means having ESN reading means for reading out said first ESN from said first EEPROM via said input/output interface means and said first external connector; judging means for judging whether or not a specific part of said first ESN read out by said ESN reading means is correct; transfer means for transferring, if the specific part of said first ESN is judged correct, said first ESN read out by said ESN reading means to said second EEPROM via said input/output interface means and said second external connector; and rewriting means for rewriting, if the specific part of said first ESN is judged correct, the specific part of the first EEPROM stored in said first EEPROM to a content to be judged incorrect via said input/output interface means and said first external connector.

Claim 18

An ESN transfer system, as claimed in Claim 17, wherein said ESN transfer unit involves an operation portion for instructing said ESN reading means to transfer said first ESN.

Claim 19

An ESN transfer unit, as claimed in Claim 18, further involving first memory means for temporarily storing said read-out first ESN, and second memory means for storing in advance said specific part of said first ESN, which is to be judged correct, wherein: said judging means checks the specific part of the first ESN stored in said first memory means with said specific part of said first ESN stored in advance in said second memory means, which is to be judged correct, and judges whether or not the specific part of said first ESN stored in said first memory means is correct.