Chapter 9 SIP

•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.

9.1.9PSTN Call Setup Signaling

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

Dual-Tone Multi-Frequency (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

9.1.10 MWI (Message Waiting Indication)

Enable Message Waiting Indication (MWI) enables your phone to give you a message– waiting (beeping) dial tone when you have one or more voice messages. Your VoIP service provider must have a messaging system that sends message-waiting-status SIP packets as defined in RFC 3842.

9.2 Custom Tones (IVR)

IVR (Interactive Voice Response) is a feature that allows you to use your telephone to interact with the ZyXEL Device. The ZyXEL Device allows you to record custom tones for the Caller Ringing Tone and On Hold Tone functions. The same recordings apply to both the caller ringing and on hold tones.

Table 61 Custom Tones Details

LABEL

DESCRIPTION

Total Time for All Tones

127 seconds for all custom tones combined

 

 

Time per Individual Tone

20 seconds

 

 

Total Number of Tones

8

Recordable

You can record up to 8 different custom tones but the total time must be

 

127 seconds or less.

 

 

9.2.0.1 Recording Custom Tones

Use the following steps if you would like to create new tones or change your tones:

1Pick up the phone and press “****” on your phone’s keypad and wait for the message that says you are in the configuration menu.

2Press a number from 1101~1108 on your phone followed by the “#” key.

3Play your desired music or voice recording into the receiver’s mouthpiece. Press the “#” key.

4You can continue to add, listen to, or delete tones, or you can hang up the receiver when you are done.

1.The ZyXEL Device supports DTMF at the time of writing.

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P-2302HWUDL-P1 Series User’s Guide