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Voice communications system

A technology of voice communication equipment and broadband communication, which is applied in the direction of telephone communication, automatic switching office, electrical components, etc., and can solve the problems that the characteristics of the telephone cannot be fully compensated

Inactive Publication Date: 2006-02-08
OKI ELECTRIC IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it is also conceivable to compensate for telephone characteristics by means of the functions of the gateway unit connected to the telephone, this does not adequately compensate for certain telephone characteristics that the gateway unit cannot understand, such as acoustic characteristics

Method used

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Experimental program
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Embodiment Construction

[0037] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. With reference to Fig. 1, the voice communication system 1 of the present embodiment comprises the gateway (GW) that is interconnected with user's telephone sets 2A and 2B respectively, and is also interconnected with broadband network such as IP network 4 and public switched telephone network (PSTN) 5 Units 3A and 3B. Thereby, the telephone sets 2A and 2B can perform voice communication via the IP network 4 or the public switched telephone network 5 . Typically, a large number of gateway units and telephones are accommodated in the IP network 4 and the public switched telephone network 5 . However, for simplicity of description, only two groups of gateway units and telephones are shown in FIG. 1 .

[0038]If the network works as a voice communication system, then one of the telephone sets, such as 2B, can be a VoIP-compatible broadband telephone...

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Abstract

Voice communications apparatus is connected to a general subscriber telephone set or a broadband telephone set, to communicate over the public switched telephone network. The apparatus includes a filter converting signals such as to satisfy signal conditions prescribed for the telephone network. The apparatus also includes a terminal class determiner for determining the class of the telephone set connected, and a circuit for changing at least the sampling frequency at which the analog signals from the telephone set are sampled. This establishes high quality in broadband voice communications. The terminal class determiner may automatically determine the class of the telephone set at any timing of a call sequence by detecting a band component of the signals from the telephone set, a predetermined frequency of a signal intermittently transmitted from the telephone set or the characteristics of the telephone set.

Description

technical field [0001] The present invention relates to a voice communication system suitable for broadband communication, and more particularly to a gateway device capable of selectively performing communication from a telephone set to an Internet Protocol (IP) network or a Public Switched Telephone Network (PSTN). Background technique [0002] Recently, Voice over IP (VoIP) technology is widely used because it can assemble voice signals into IP packets, thereby integrating voice and data to generate lower network or communication costs. However, on the other hand, the traditional public switched telephone network (PSTN) focuses on transmitting voice signals, and its transmission frequency band is limited to 3.1 kHz or lower. This network design architecture will limit the unit channel bandwidth to 3.1kHz, while the digital transmission network has a basic transmission rate of 64Kb / s, and its sampling rate is 8KHz. This means that both the terminal and the network will pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M7/00H04Q3/42H04M3/00H04M11/00
CPCY02T10/125
Inventor 薄叶伸司久保木浩青柳弘美
Owner OKI ELECTRIC IND CO LTD