Methods of using digital modem identification information

• US 6,421,376 B1
• Filed: 09/03/1998
• Issued: 07/16/2002
• Est. Priority Date: 09/03/1998
• Status: Expired due to Fees

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: 3Com Corporation (HP Inc.)
• Inventors: Rosenlof, John, Williams, Richard G. C.
• Primary Examiner(s): Chin, Stephen
• Assistant Examiner(s): Ha, Dac V.
• Application Number:
  US09/148,184
• Time in Patent Office: 1,412 Days
• Field of Search: 375/220, 375/222, 375/254, 375/257, 375/258, 375/285, 375/350, 375/216, 379/406, 379/407, 379/410, 379/344, 379/345, 370/286, 370/287
• US Class Current: 375/222
• CPC Class Codes: H04L 5/1438 Negotiation of transmission parameters prior to communication modified according to link quality H04L1/0001

Abstract

Improved data communication for modems having digital identification information capability. More particularly, the invention is based on the realization that the ability to signal connection type information between modems permits new uses of existing analog modem configurations, and permits efficiently utilizing an analog modem when communicating with a host modem, the analog modem having a far echo canceling capability, including: determining if the host modem has digital communication capability; communicating between the analog modem and the host modem using analog communication processing if the host modem is determined not to have digital communication capability; communicating between the analog modem and the host modem using a modified communication processing protocol if the host modem is determined to have digital communication capability, the modified communication processing protocol including: terminating any use of the far echo canceling capability of the analog modem for far echo cancellation; optionally applying the far echo canceling capability of the analog modem to improve near echo cancellation for the analog modem; and optionally applying the far echo canceling capability of the analog modem to train for cancellation of any intermediate echo that may affect the analog modem.

Claims

1. A method for efficiently utilizing an analog modem when communicating with a host modem, the analog modem having a far echo canceling capability, including the steps of:

(a) determining if the host modem has digital communication capability;

(b) communicating between the analog modem and the host modem using a modified communication processing protocol if the host modem is determined to have digital communication capability, the modified communication processing protocol including terminating any use of the far echo canceling capability of the analog modem for far echo cancellation; and

(c) applying the far echo canceling capability of the analog modem to improve near echo cancellation for the analog modem.

2. The method of claim 1, the modified communication processing further including communicating between the analog modem and the host modem using analog communication processing if the host modem is determined not to have digital communication capability.

3. The method of claim 1, the modified communication processing further including applying the far echo canceling capability of the analog modem to train for cancellation of any intermediate echo that may affect the analog modem.

4. A method for utilizing an analog modem when communicating with a host modem, the analog modem having a far echo canceling capability, including the steps of:

(a) determining if the host modem has digital communication capability;

(b) communicating between the analog modem and the host modem using a modified communication processing protocol if the host modem is determined to have digital communication capability, the modified communication processing protocol including the steps of;

(1) terminating any use of the far echo canceling capability of the analog modem for far echo cancellation;

(2) selectively applying the far echo canceling capability of the analog modem to improve near echo cancellation for the analog modem; and

(3) selectively applying the far echo canceling capability of the analog modem to train for cancellation of any intermediate echo that may affect the analog modem.

5. The method of claim 4, the modified communication processing further including communicating between the analog modem and the host modem using analog communication processing if the host modem is determined not to have digital communication capability.

6. An analog modem for efficiently communicating with a host modem, including:

(a) far echo canceling capability;

(b) means for determining if the host modem has digital communication capability;

(c) means for communicating between the analog modem and the host modem using a modified communication processing protocol if the host modem is determined to have digital communication capability, the modified communication processing protocol including means for terminating any use of the far echo canceling capability of the analog modem for far echo cancellation; and

(d) means for applying the far echo canceling capability of the analog modem to improve near echo cancellation for the analog modem.

7. The analog modem of claim 6, the modified communication processing further including means for communicating between the analog modem and the host modem using analog communication processing if the host modem is determined not to have digital communication capability.

8. The method of claim 6, the modified communication processing further including means for applying the far echo canceling capability of the analog modem to train for cancellation of any intermediate echo that may affect the analog modem.

9. An analog modem for efficiently communicating with a host modem, including:

(a) far echo canceling capability;

(b) means for determining if the host modem has digital communication capability;

(c) means for communicating between the analog modem and the host modem using a modified communication processing protocol if the host modem is determined to have digital communication capability, the modified communication processing protocol including means for;

(1) terminating any use of the far echo canceling capability of the analog modem for far echo cancellation;

(2) selectively applying the far echo canceling capability of the analog modem to improve near echo cancellation for the analog modem; and

(3) selectively applying the far echo canceling capability of the analog modem to train for cancellation of any intermediate echo that may affect the analog modem.

10. The analog modem of claim 9, the modified communication processing further including means for communicating between the analog modem and the host modem using analog communication processing if the host modem is determined not to have digital communication capability.