Communication line connecting adapter and communication line connecting method

• US 7,263,094 B2
• Filed: 11/25/2003
• Issued: 08/28/2007
• Est. Priority Date: 11/28/2002
• Status: Expired due to Fees

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Yamaji, Hirotaka
• Primary Examiner(s): SMITH, CREIGHTON H
• Application Number:
  US10/720,306
• Publication Number:
  US 20040105432A1
• Time in Patent Office: 1,372 Days
• Field of Search: 370/352, 370/524, 370/401, 370/466, 370/353, 370/354, 370/355, 370/356, 370/400, 370/465
• US Class Current: 370/352
• CPC Class Codes: H04M 7/0069 comprising a residential gateway, e.g. those which provide an adapter for POTS or ISDN terminals

Abstract

Disclosed is a communication line connecting adapter which adequately connects an ordinary telephone, IP phone and modem/facsimile machine to a connecting party. The adapter comprises first to third switches, a line which connects a common terminal of the first switch to the modem/facsimile machine via a first DAA circuit, a line which connects a zeroth node terminal of the first switch to a public telephone line and a common terminal of the second switch, a line which connects a first node terminal of the first switch to a VoIP gateway via an SLIC, a line which connects the first node terminal of the first switch to a zeroth node terminal of the third switch, a line which connects a zeroth node terminal of the second switch to the VoIP gateway via a second DAA circuit, a line which connects a first node terminal of the second switch to a first node terminal of the third switch, and a line which connects a common terminal of the third switch to an extension line.

Claims

1. A communication line connecting adapter comprising:

a Voice over Internet Protocol (VoIP) gateway which performs protocol conversion for telephone communication;

means which connects a call for a general telephone to said general telephone;

means which connects a call for an IP (Internet Protocol) phone to said general telephone via said VoIP gateway; and

means which connects a call for said general telephone to said IP phone via said VoIP gateway.

2. The communication line connecting adapter according to claim 1, further comprising:

means which connects an incoming call to said VoIP gateway and a modem/facsimile section;

means which judges whether or not a control signal for initiating facsimile communication or modem communication has come from a calling party;

means which disconnects said VoIP gateway from a public telephone line when it is judged that said control signal has come; and

means which disconnects said modem/facsimile section from said public telephone line when it is judged that said control signal has not come yet.

3. The communication line connecting adapter according to claim 1, further comprising:

a modem/facsimile section which performs modem communication and facsimile communication; and

means which connects said VoIP gateway to said modem/facsimile section.

4. The communication line connecting adapter according to claim 1, further comprising:

a modem/facsimile section which performs modem communication and facsimile communication; and

means which connects said modem/facsimile section to an outside line.

5. The communication line connecting adapter according to claim 1, further comprising:

a modem/facsimile section which performs modem communication and facsimile communication; and

means which connects said modem/facsimile section to an extension line.

6. A communication line connecting adapter which connects a public telephone line, a VoIP (Voice over Internet Protocol) gateway and a modem/facsimile section and comprises:

means which connects said public telephone line to said VoIP gateway and said modem/facsimile section when there is an incoming call from said public telephone line;

means which judges whether or not a control signal for initiating facsimile communication or modem communication has come from a calling party;

means which disconnects said VoIP gateway from said public telephone line when it is judged that said control signal has come; and

means which disconnects said modem/facsimile section from said public telephone line when it is judged that said control signal has not come yet.

7. A communication line connecting method which connects a public telephone line, a VoIP (Voice over Internet Protocol) gateway and a modem/facsimile section and comprises the steps of:

connecting said public telephone line to said VoIP gateway and said modem/facsimile section when there is an incoming call from said public telephone line;

judging whether or not a control signal for initiating facsimile communication or modem communication has come from a calling party;

disconnecting said VoIP gateway from said public telephone line when it is judged that said control signal has come; and

disconnecting said modem/facsimile section from said public telephone line when it is judged that said control signal has not come yet.