ZyXEL Communications P2000W manual Pstn Call Setup Signaling, Phone Setting, 13.3.2 G.729

P-2000W_V2 User’s Guide

Pulse Code Modulation (PCM) measures analog signal amplitudes at regular time intervals and converts them into bits.

13.3.2 G.729

G.729 is an Analysis-by-Synthesis (AbS) hybrid waveform codec that uses a filter based on information about how the human vocal tract produces sounds. G.729 provides good sound quality and reduces the required bandwidth to 8kbps.

13.4 PSTN Call Setup Signaling

PSTNs (Public Switched Telephone Network)s use DTMF or pulse dialing to set up telephone calls.

(Dual-Tone MultiFrequency (DTMF) signaling uses pairs of frequencies (one lower frequency and one higher frequency) to set up calls. It is also known as Touch Tone®. Each of the keys on a DTMF telephone corresponds to a different pair of frequencies.

Pulse dialing sends a series of clicks to the local phone office in order to dial numbers.1

13.5 Phone Setting

Use this screen to configure the way your prestige handles telephone connections and codes voice-data.

Figure 34 PHONE

1.The Prestige supports DTMF at the time of writing.

	Chapter 13 Administrator Web Configurator Screens	101
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