Method and apparatus for connecting to a packet based communication system

• US 6,487,197 B1
• Filed: 05/11/1999
• Issued: 11/26/2002
• Est. Priority Date: 05/11/1999
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Nortel Networks Limited (Nortel Networks Corporation)
• Inventors: Elliott, Stephen Bennett
• Primary Examiner(s): Kizou, Hassan
• Assistant Examiner(s): HOANG, THAI D
• Application Number:
  US09/309,722
• Time in Patent Office: 1,295 Days
• Field of Search: 370/352-356, 370/493-495, 370/526-529, 379/142.18, 379/93-5-, 379/93.14, 379/93.15, 379/96.18, 379/93-1-
• US Class Current: 370/354
• CPC Class Codes: H04L 12/66 Arrangements for connecting between networks having differing types of switching systems, e.g. gateways

Abstract

As a telecommunications device goes off-hook a simultaneous connection is made to a local exchange and a data network removing the necessity to dial, or input numbers to access the data network. Upon connection to the local data network, a modem tone is returned to the telecom device. Connection to the local exchange causes a dial tone to be returned to the DSLAM in the local change. The device receives the modem tone, the dial tone is blocked by the DSLAM and a data communication session begins. If the device transmits DTMF signals within 20 seconds, the call reverts to a standard switched call, dropping the connection with the local data network. If no DTMF signals are sent within 20 seconds, the DSLAM releases the connection with the local Exchange and the data communications session continues.

Claims

1. A method for connecting to a packet based communications system, said method comprising the steps of:

receiving an off-hook signal from an initiating device;

simultaneously transmitting said off-hook signal to a digital switch and a modem pool;

returning a modem tone signal to said initiating device; and

initiating said packet based communications session.

2. The method of claim 1, further comprising:

responsive to receipt of a dial tone signal and said modem tone signal, performing a logical ‘

and’

operation with said dial tone and said modem tone.

3. The method of claim 1, further comprising:

terminating said modem tone signal if a Dual Tone Multi-Frequency (DTMF) tone is detected within a predetermined time period from receipt of said off-hook signal.

4. The method of claim 3, further comprising:

connecting said initiating device to a terminal device and beginning a communication session.

5. The method of claim 1, further comprising:

terminating a dial tone signal if no DTMF tone is asserted within a pre-determined time period.

6. An apparatus for connecting to a packet based communications system, said apparatus comprising:

a Digital Subscriber Line Access Multiplexer (DSLAM) for receiving an off-hook signal from an initiating device and simultaneously transmitting said off-hook signal to a digital switch and a modem pool;

a modem pool for returning a modem tone signal to said initiating device; and

a means for initiating said packet based communications session.

7. The apparatus of claim 6, further comprising:

a logic means for performing a logical ‘

and’

operation with said dial tone and said modem tone.

8. The apparatus of claim 6, further comprising:

means for terminating said modem tone signal if a Dual Tone Multi-Frequency (DTMF) tone is detected within a predetermined time period from receipt of said off-hook signal.

9. The apparatus of claim 8, further comprising:

means for connecting said initiating device to a terminal device and beginning a communication session.

10. The apparatus of claim 6, further comprising:

means for terminating a dial tone signal if no DTMF tone is asserted within a pre-determined time period.

11. A program of instructions for a telecommunications device within an instruction bearing medium for connecting to a packet based communications system, said program of instructions comprising:

instructions within said instruction bearing medium for receiving an off-hook signal from an initiating device;

instructions within said instruction bearing medium for simultaneously transmitting said off-hook signal to a digital switch and a modem pool;

instructions within said instruction bearing medium for returning a modem tone signal to said initiating device; and

instructions within said instruction bearing medium for initiating said packet based communications session.

12. The program of instructions of claim 11, further comprising:

instructions within said instruction bearing medium for responsive to receipt of a dial tone signal and said modem tone signal, performing a logical ‘

and’

operation with said dial tone and said modem tone.

13. The program of instructions of claim 11, further comprising:

instructions within said instruction bearing medium for terminating said modem tone signal if a Dual Tone Multi-Frequency (DTMF) tone is detected within a predetermined time period from receipt of said off-hook signal.

14. The program of instructions of claim 13, further comprising:

instructions within said instruction bearing medium for connecting said initiating device to a terminal device and beginning a communication session.

15. The program of instructions of claim 11, further comprising:

instructions within said instruction bearing medium for terminating a dial tone signal if no DTMF tones is asserted within a pre-determined time period.