G.165 Modem Tone Detect

FAX / MODEM G.165 (2100 HZ) TONE DISABLE

In telecommunications systems, it is often necessary to detect the presence of a voice-band modem signal.

Features List

  • Functions are C-callable
  • Multiple channel operation
  • Low per-channel memory requirements

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ADT G.165 is available on the above Platforms: Other configurations are available upon request.

Specifications

Description

In telecommunications systems, it is often necessary to detect the presence of a voice-band modem signal. In particular, when using a line echo canceller, it is desirable to disable certain aspects of echo cancellers or echo suppressors. Modems therefore precede their transmissions with a disable tone. These tones are described in ITU recommendations G.164 and G.165.

The ADT G.165 Tone Detector detects both of the aforementioned disable tones.

Function

API function call summary

G165DET_ADT_initG165Detect(…) Initializes G165 Detector channel

G165DET_ADT_g165Detect (…) ExecutesG165 detector function

G165DET_ADT_g165ReleaseCheck(…) Executes G165 Release Check

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