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Tone Generation

Types of Tones

The CSP lets you transmit address signaling and call progress tones. Each tone type is available for both µ-law and A-law. You can generate the following tones:

• Dual Tone Multi-frequency (DTMF)

• Multi-frequency R1 (MFR1)

• Multi-frequency R2 (MFR2 – backward and forward) *

• Call Progress Tone Patterns (CPT4)

• Calling Card Prompt (Bong Tone)

* Every card that has an MFR2 receiver must also have a corresponding forward and backward Universal transmitter. To duplicate the generation of a tone for redundancy, configure the tone function on separate cards.

DTMF Receiver with Termination of Tone Announcement

This feature supports the following functionality:

• Cancel tone generation or playback

• Application defined termination digit for play files

The DSP Service Request (0x00BD) and DSP Service Cancel (0x00BE) API messages have been modified to enable this feature.

This feature also permits the host to specify which DTMF digit to look for in order to terminate the file or tone that is currently playing.

A tone sent to the caller indicating the progress of the call. Examples include dial tone, busy tone, ringback tone, and comfort noise (digital cellular).
Tone commonly used to indicate additional action is required by the caller, such as dialing more digits (for example, entry of personal ID number).
Digital Signal Processor