System Functions; Call Processing Functions; Analog Fxs Control Functions; Emergency Call Switchover Function - Davolink DV-201DM User Manual

3 System Functions

3.1. Call Processing Functions

Call Processing Functions: Delivers voice via packetized network to call destination.
Basic Functions include:
- Inter-extension connection
- Monitoring/Error Management

3.2. Analog FXS Control Functions

Analog FXS Control Functions are used for SLT connection. It packetizes analog
voice and transmits through digital network to call destination. (call routing function).

3.3. Emergency Call Switchover Function

Emergency Call Switchover Function is a unique function compared to other devices.
The device automatically switches over to PSTN backup line when:
- Power failure
- Device Malfunction
3.4. DTMF / Call Progress Tone Detection & Generation Function
DTMF/Call Progress Tone Detection and Tone Generation Function detect and
generate inband-tone transmitted over an analog line.
3.5. Voice Compression & Decompression Function
Voice Compression is the packetizing of PCM-coded voice data. Decompression is
conversion of packetized voice data back into PCM-code. Supports G,729.a, and
G.723.1 Voice Coding mode.
The actual voice compression/decompression is processed inside of Digital Signal
Processor and the functional unit controls DSP H/W.
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