# US 5,710,985 A · Wireless portable telephone having antenna retraction detection means

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- Number: US 5,710,985 A
- Document ID: US5710985A
- Status: Granted
- Kind: A
- Application number: 08/383,103
- Filed: 1995-02-03
- Granted: 1998-01-20
- Earliest claimed: 1994-02-17
- Assignees: Mitsubishi Denki Kabushiki Kaisha
- Inventors: Kiyoshi Matsumoto
- Web page: https://patentgrep.com/patent/US5710985A

## CPC

- H04M 1/72505: Radio link set-up procedures
- H04B 1/38: Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08)
- H04B: TRANSMISSION

## Abstract

Upon the reception of a page message from a base station (step S1-1), a wireless portable telephone transmits to the exterior a page response which is a response to the page message (step S1-2). If, when transmitting the page response, a data transmission error has been detected (step S1-3), then a predetermined warning tone is generated (step S1-4). Thus, by virtue of this warning tone, the user of the wireless portable telephone can draw out an antenna or move to a place in which the electric field is in a good condition.

## Claims

### Claim 1

A wireless portable telephone for use in a wireless telephone system, comprising:
means for carrying out a communication transmission and reception sequence with a base station whereby a communication link is established between said wireless telephone and said base station;
data transmission means for carrying out a selected portion of said sequence by data transmission from said wireless telephone to said base station;
data transmission monitor means for detecting whether said data transmission by said data transmission means has succeeded or not in said sequence of establishing a communication link between said wireless telephone and said base station;
an antenna section;
antenna retraction monitor means for detecting whether said antenna section is retracted or not; and
warning means for giving warning to a user of said telephone when said data transmission monitor means detects that the data transmission by said data transmission means has failed and said antenna retraction monitor means detects that said antenna section is retracted.

### Claim 2 (depends on 1)

A wireless portable telephone according to claim 1, wherein said data transmission monitor means includes:
detection means for judging that the data transmission has failed when no response bit appears among a data stream from a base station within a predetermined period of time after said data transmission means has sent out data.

### Claim 3 (depends on 1)

A wireless portable telephone according to claim 1, wherein said warning means includes a warning tone generation means for generating a predetermined warning tone.

### Claim 4 (depends on 1)

A wireless portable telephone according to claim 1, wherein said warning means includes a warning message display means for displaying a predetermined warning message.

### Claim 5

A wireless portable telephone for use in a wireless telephone system having means for carrying out a communication transmission and reception sequence with a base station whereby a communication link is established between said wireless telephone and said base station, comprising:
an antenna section;
antenna retraction monitor means for detecting whether said antenna section is retracted or not; and
warning means for giving warning to a user of said telephone when said antenna retraction monitor means detects that said antenna section is retracted upon the reception of a call-in signal.

### Claim 6 (depends on 5)

A wireless portable telephone according to claim 5, wherein said warning means includes a warning tone generation means for generating a predetermined warning tone.

### Claim 7 (depends on 5)

A wireless portable telephone according to claim 5, wherein said warning means includes a warning message display means for displaying a predetermined warning message.