ZyXEL Communications Prestige 2000W - Manual (Page 99)

Prestige 2000W_V2 User’s Guide
Chapter 13 Administrator Web Configurator Screens 99
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.