Communication system for telephone

An indoor communication system for telephone to be used together with an indoor wire-connected telephone, comprising:

• a microphone connected by a wire to the indoor wire-connected telephone for receiving a first voice signal from a user and then transmitting the first voice signal to the indoor wire-connected telephone;
• a transmitter connected to the indoor wire-connected telephone for receiving a second voice signal from the indoor wire-connected telephone and then converting the second voice signal into a wireless signal so that the wireless signal is broadcast by the transmitter, wherein the transmitter can be an separated unit or a built-in unit in the indoor wire-connected telephone;
• and
• a receiver earphone for picking up the wireless signal from the transmitter and then converting the wireless signal into a third voice signal for hearing by the user, wherein the transmitter and the receiver earphone are coupled in a wireless manner, and the receiver earphone forms a stand-alone unit that does not contain a transmitter.

An indoor communication system for telephone to be used together with an indoor wireless telephone, comprising:

• a microphone connected by a wire to the indoor wireless telephone for receiving a first voice signal from a user and then transmitting the first voice signal to the indoor wireless telephone;
• a transmitter connected to the indoor wireless telephone for receiving a second voice signal from the indoor wireless telephone and then converting the second voice signal into a wireless signal so that the wireless signal is broadcast by the transmitter, wherein the transmitter can be an separated unit or a built-in unit in the indoor wireless telephone;
• and
• a receiver earphone for picking up the wireless signal from the transmitter and then converting the wireless signal into a third voice signal for hearing by the user, wherein the transmitter and the receiver earphone are coupled in a wireless manner, and the receiver earphone forms a stand-alone unit that does not contain a transmitter.

A communication system, comprising:

• a telephone having a built-in transmitter, wherein the built-in transmitter is used for receiving a first voice signal from the telephone and then converting the first voice signal into a wireless signal so that the wireless signal is broadcast by the built-in transmitter;
• a microphone connected by a wire to the telephone for receiving a second voice signal from a user and then transmitting the second voice signal to the telephone;
• and
• a receiver earphone for picking up the wireless signal from the built-in transmitter of the telephone and then converting the wireless signal into a third voice signal for hearing by the user, wherein the receiver earphone forms a stand-alone unit that is not connected to the microphone;
• and
• a wire earphone set, which is optionally comprised in the system to connect to the telephone, wherein when the ire earphone is comprised to be connected to the telephone, the built-in transmitter is automatically disabled.

A communication system for a telephone to be installed inside a car, comprising:

• a microphone connected by a wire to the telephone for receiving a first voice signal from a user and then transmitting the first voice signal to the mobile or cellular telephone;
• a transmitter connected to the telephone for receiving a second voice signal from the telephone and then converting the second voice signal into a wireless signal so that the wireless signal is broadcast by the transmitter;
• and
• a receiver earphone for picking up the wireless signal from the transmitter and then converting the wireless signal into a third voice signal for hearing by the user, wherein the transmitter and the receiver earphone are coupled in a wireless manner, and the receiver earphone forms a stand-alone unit that is not connected to the microphone.