High availability telephone set

• US 20040190685A1
• Filed: 05/16/2003
• Published: 09/30/2004
• Est. Priority Date: 03/26/2003
• Status: Abandoned Application

• Current Assignee: Mitel Networks Corporation
• Original Assignee: Mitel Networks Corporation
• Inventors: Davies, Jim N.
• Application Number:
  US10/439,882
• Publication Number:
  US 20040190685A1
• Time in Patent Office: Days
• US Class Current: 379/9.05
• CPC Class Codes: H04M 1/724 User interfaces specially adapted for cordless or mobile telephones
• CPC Class Codes: H04M 1/738 Interface circuits for coupling substations to external telephone lines H04M1/78 takes precedence
• CPC Class Codes: H04M 1/74 with means for reducing interference; with means for reducing effects due to line faults

Abstract

A high availability telephone instrument, comprising a primary communications link interface connected to a primary communications link; at least one backup communications link interface connected to at least one backup communications link; and a controller connected to for detecting failure of the primary communications link and in response selecting the at least one backup communications link for providing voice communication between the telephone instrument and the backup communications link.

Claims

1. A high availability telephone instrument, comprising:

a primary communications link interface connected to a primary communications link;

at least one backup communications link interface connected to at least one backup communications link; and

a controller connected to said primary communications link interface and at least one backup communications link interface for detecting a predetermined call condition and in response selecting said at least one backup communications link for providing voice communication between said telephone instrument and said backup communications link.

2. The high availability telephone instrument of claim 1, wherein said call condition is failure of said primary communications link.

3. The high availability telephone instrument of claim 1, wherein said primary and at least one backup communications links are selected from the group comprising analog and digital communications links.

4. The high availability telephone instrument of claim 3, wherein said analog communications links are selected from the group comprising analog telephone lines and radio links.

5. The high availability telephone instrument of claim 3, wherein said digital communications links are selected from the group comprising LAN connections, ISDN lines and radio links.

6. The high availability telephone instrument of claim 2, wherein said call condition is user selection of said at least one backup communications link.

7. The high availability telephone instrument of claim 2, wherein said call condition is decoding and comparison of a predetermined user dialed number to a predefined routing criteria.