OMAP-L138: VOLIB TDU CPT issue

Bakir

Part Number: OMAP-L138

Hi, TI support!

I'm using TDU (Tone Detection Unit) from VOLIB Release 2.1.0.1. One of my task is to trace a call progress tones (CPT) at the voice channels.

The problem is, call progress tones could arrive from TDM side and from Network side simultaneously. But I need to trace only TDM tones. I have configured TDU to work only with TDM side and after conferencing (using tdu_CTL_POSITION). When CPT generated on the network side TDU is also activated, that is not required.

My question is how to configure tduCptCfgCtl_t (call progress tone detector configuration structure) to filter TDM side signal? There is no any such example in VOLIB packages. Parameters startFreq and endFreq are set to 420 Hz and 430 Hz accordingly. CPT on the both sides have the same frequency (425 Hz).

Many thanks!

Bakir

over 6 years ago

0 Yordan Kovachev over 6 years ago

TI__Guru**** 161600 points

Hi Bakir,

I've notified the sw team. Their feedback will be posted here.

Best Regards,
Yordan

0 Bakir over 6 years ago in reply to Yordan Kovachev

Intellectual 585 points

Thank you, Yordan!

0 Bakir over 6 years ago in reply to Bakir

Intellectual 585 points

Major problem is what values must be placed in toneOnEnergy, toneOnSnr params. I tried to set them but failed to filter out my main CPT signal. May be I'm using wrong Q number format?

For example, I set toneOnEnergy to -15 or -5 dBm, but TDU detects tone with -20 dBm power. Where is the truth?

0 Bakir over 6 years ago in reply to Yordan Kovachev

Intellectual 585 points

Hi Yordan,

Sorry to disturb you. How soon can my question be answered by SW team?
I've found workaround, but want to get a straight solution.

Bakir

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OMAP-L138: VOLIB TDU CPT issue