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Page 156 / 427 Scroll up to view Page 151 - 155
P-2602H(W)(L)-DxA Series User’s Guide
156
Chapter 11 Voice
11.3.1
RTP
When you make a VoIP call using SIP, the RTP (Real time Transport Protocol) is used to
handle voice data transfer. See RFC 1889 for details on RTP.
11.4
Pulse Code Modulation
Pulse Code Modulation (PCM) measures analog signal amplitudes at regular time intervals
and converts them into bits.
11.5
Voice Coding
A codec (coder/decoder) codes analog voice signals into digital signals and decodes the digital
signals back into analog voice signals. The ZyXEL Device supports the following codecs.
11.5.1
G.711
G.711 is a Pulse Code Modulation (PCM) waveform codec. G.711 provides very good sound
quality but requires 64kbps of bandwidth.
11.5.2
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.
SIP Service
Domain
Enter the SIP service domain name. In the full SIP URI, this is the part after the @
symbol.
You can use up to 127 printable ASCII Extended set characters.
Send Caller ID
Select this if you want to send identification when you make VoIP phone calls.
Clear this if you do not want to send identification.
Authentication
User Name
Enter the user name for registering this SIP account, exactly as it was given to you.
You can use up to 95 printable ASCII characters.
Password
Enter the user name for registering this SIP account, exactly as it was given to you.
You can use up to 95 printable ASCII Extended set characters.
Apply
Click this to save your changes and to apply them to the ZyXEL Device.
Cancel
Click this to set every field in this screen to its last-saved value.
Advanced Setup
Click this to edit the advanced settings for this SIP account. The
Advanced SIP
Setup
screen appears.
Table 53
SIP > SIP Settings
LABEL
DESCRIPTION
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Chapter 11 Voice
157
11.6
PSTN Call Setup Signaling
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
11.7
MWI (Message Waiting Indication)
Enable Message Waiting Indication (MWI) enables your phone to give you a message–
waiting (beeping) dial tone when you have a voice message(s). Your VoIP service provider
must have a messaging system that sends message waiting status SIP packets as defined in
RFC 3842.
11.8
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.
11.8.0.1
Recording Custom Tones
Use the following steps if you would like to create new tones or change your tones:
1
Pick up the phone and press “****” on your phone’s keypad and wait for the message
that says you are in the configuration menu.
2
Press a number from 1101~1108 on your phone followed by the “#” key.
3
Play your desired music or voice recording into the receiver’s mouthpiece. Press the “#”
key.
1.
The ZyXEL Device does not support pulse dialing at the time of writing.
Table 54
Custom Tones Details
LABEL
DESCRIPTION
Total Time for All Tones
120 seconds for all custom tones combined
Time per Individual Tone
20 seconds
Total Number of Tones
Recordable
Ten
You can record up to ten different custom tones but the total time must
be 120 seconds or less.
For example you could record up to ten 12-second tones or up to six 20-
second tones.
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Chapter 11 Voice
4
You can continue to add, listen to, or delete tones, or you can hang up the receiver when
you are done.
11.8.0.2
Listening to Custom Tones
Do the following to listen to a custom tone:
1
Pick up the phone and press “****” on your phone’s keypad and wait for the message
that says you are in the configuration menu.
2
Press a number from 1201~1208 followed by the “#” key to listen to the tone.
3
You can continue to add, listen to, or delete tones, or you can hang up the receiver when
you are done.
11.8.0.3
Deleting Custom Tones
Do the following to delete a custom tone:
1
Pick up the phone and press “****” on your phone’s keypad and wait for the message
that says you are in the configuration menu.
2
Press a number from 1301~1308 followed by the “#” key to delete the tone of your
choice. Press 14 followed by the “#” key if you wish to clear all your custom tones.
You can continue to add, listen to, or delete tones, or you can hang up the receiver when you
are done.
11.9
Advanced SIP Setup Screen
Click
VoIP > SIP > SIP Settings
to open the
SIP Settings
screen. Select a SIP account and
click
Advanced Setup
to open the
Advanced SIP Setup
screen. Use this screen to maintain
advanced settings for each SIP account.
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Chapter 11 Voice
159
Figure 88
VoIP > SIP Settings > Advanced
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160
Chapter 11 Voice
Each field is described in the following table.
Table 55
VoIP > SIP Settings > Advanced
LABEL
DESCRIPTION
SIP Account
This field displays the SIP account you see in this screen.
SIP Server Set-
tings
URL Type
Select whether or not to include the SIP service domain name when the ZyXEL
Device sends the SIP number.
SIP
- include the SIP service domain name.
TEL
- do not include the SIP service domain name.
Expiration Dura-
tion
Enter the number of seconds your SIP account is registered with the SIP register
server before it is deleted. The ZyXEL Device automatically tries to re-register your
SIP account when one-half of this time has passed. (The SIP register server might
have a different expiration.)
Register Re-send
timer
Enter the number of seconds the ZyXEL Device waits before it tries again to regis-
ter the SIP account, if the first try failed or if there is no response.
Session Expires
Enter the number of seconds the ZyXEL Device lets a SIP session remain idle
(without traffic) before it automatically disconnects the session.
Min-SE
Enter the minimum number of seconds the ZyXEL Device lets a SIP session
remain idle (without traffic) before it automatically disconnects the session. When
two SIP devices start a SIP session, they must agree on an expiration time for idle
sessions. This field is the shortest expiration time that the ZyXEL Device accepts.
RTP Port Range
Start Port
End Port
Enter the listening port number(s) for RTP traffic, if your VoIP service provider
gave you this information. Otherwise, keep the default values.
To enter one port number, enter the port number in the
Start Port
and
End Port
fields.
To enter a range of ports,
•
enter the port number at the beginning of the range in the
Start Port
field.
•
enter the port number at the end of the range in the
End Port
field.
Voice Compres-
sion
Select the type of voice coder/decoder (codec) that you want the ZyXEL Device to
use. G.711 provides higher voice quality but requires more bandwidth (64 kbps).
•
G.711A
is typically used in Europe.
•
G.711u
is typically used in North America and Japan.
In contrast,
G.729
only requires 8 kbps.
The ZyXEL Device must use the same codec as the peer. When two SIP devices
start a SIP session, they must agree on a codec.
Primary Compres-
sion Type
Select the ZyXEL Device’s first choice for voice coder/decoder.
Secondary Com-
pression Type
Select the ZyXEL Device’s second choice for voice coder/decoder. Select
None
if
you only want the ZyXEL Device to accept the first choice.
Third Compres-
sion Type
Select the ZyXEL Device’s third choice for voice coder/decoder. Select
None
if you
only want the ZyXEL Device to accept the first or second choice.

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