Call Progress Tones (CPT)

Call Progress Tones are audible tones set from switching systems to calling parties to show the status of calls. The Call progress tones (CPT) generator resides at the Local Exchange and is used to generate the tones to be sent to the Terminal Equipment. CPT detectors are used in Terminal Equipments for machine recognition of tones.

Ittiam's Call Progress Tones supports the following tones

• Dial Tone, Recall dial tone
• Ringing Tone, Ringing tone (PABX)
• Busy Tone and Congestion Tone
• Special Information tone
• Warning Tone
• Waiting Tone
• Record Tone
• Executive override tone
• Intercept tone
• Confirmation tone

Technical Specification

• Supports generation and detection of call progress tones
• Support for all tones specified in the E.180/Q.35 specification
• Configurable parameters (single or dual frequency, frequency ranges , modulation)
• Reentrant, multi-channel implementation
• C callable APIs

Applications

• Telecommunication
• Billing Systems
• Voice over Packet systems
• Automatic Dialers

Platforms

• Currently supported on TI C64x™ (TMS320C64xx™) and TI C64x+™/DaVinci™ (DM644x™)
• For further details contact mkt@ittiam.com