Programmable call progress tones for a switching system

• US 5,436,964 A
• Filed: 04/21/1993
• Issued: 07/25/1995
• Est. Priority Date: 05/07/1992
• Status: Expired due to Term

• Current Assignee: Mitel Networks Corporation
• Original Assignee: Zarlink Semiconductor Inc. (Microchip Technology Incorporated)
• Inventors: Halligan, Janice C.
• Primary Examiner(s): Dwyer, James L.
• Assistant Examiner(s): Wolinsky, Scott
• Application Number:
  US08/050,900
• Time in Patent Office: 825 Days
• Field of Search: 379/257, 379/418, 379/67, 370/110.1, 370/67, 370/58, 370/85, 370/110.3, 370/110.2, 370/85.1
• US Class Current: 379/257
• CPC Class Codes: H04M 19/02 providing ringing current or supervisory tones, e.g. dialling tone or busy tone
• CPC Class Codes: H04Q 1/45 using multi-frequency signalling H04Q1/46 takes precedence

Abstract

In accordance with an embodiment of the invention, a method of establishing call progress tones for a switching system having a generic signal generating apparatus, comprising the steps of displaying at least one form on a display and inserting into fields of the form definitions of the cadencing and particular generic signals associated with each call progress tone for a tone plan, temporarily storing the definitions in a memory, compiling the definitions as control signals into object code, storing the object code in a random access memory, and using the object code in the processing of a call by a switching system processor to control provision of particular signals from the generic signal generating apparatus with a particular cadence and signal level to a subscriber or operator.

Claims

1. A method of establishing call progress tones for a switching system having generic signal generating means comprising the steps of:

(a) displaying at least one form on a display and inserting into fields of the form definitions of cadencing and particular generic signals associated with each call progress tone for a tone plan,

(b) temporarily storing the definitions in a memory,

(c) compiling the definitions as control signals into object code,

(d) storing the object code in a random access memory, and

(e) using the object code in the processing of a call by a switching system processor to control provision of particular signals from the generic signal generating means with defined particular cadence and signal level to a subscriber or operator.

2. A method as defined in claim 1 in which the generic signal generating means is a digital signal processor for providing various signal frequencies and levels in different output channels, and in which the definition of particular signal frequencies to be used for a particular type of call progress tone is a definition of which of said output channels to use.

3. A method as defined in claim 2 in which the definitions of cadence and signal frequency are stored in one portion of the memory, and in which the definition of which cadencing and particular signal frequencies are to be used for a particular type of call progress tone is stored in a second portion of the memory.

4. A method as defined in claim 3, in which the switching system is comprised of a first system identification module, including the further step of removing said first module prior to said displaying step and replacing it with a second tone definition authorization module, and following the object code storing step, removing said second module and replacing it with said first module, then operating the switching system using said first module and said object code.