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Voice over IP

Section

This chapter will describe the

Voice Section

accessible from the

Home Page

of the

DISCUS™ Multiplay Wireless VoIP AG

.

LINE SETTINGS

The Line Settings tab of the VoIP screen defines the phone ports of

the Router and allows you to configure them.

1.

Click the 'Voice Over IP' side-bar icon.

2.

Click the 'Line Settings' tab, the following screen will appear.

Before starting to make phone calls, you need to configure each

line's parameters. You can manage which telephone is operational

by marking the check-box next to it.

Be aware that any configuration changes could compromise your connectivity.

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Voice over IP Section

FIGURE 1.

Line Settings Panel

3.

Click the edit action icon of each line to configure its different parameters.

SPEED DIAL

You can assign speed dial numbers to parties you frequently call. A speed dial

entry must specify a destination which may be of one of three types: proxy,

local line or direct call.

FIGURE 2.

Speed Dial Panel

Speed Dial via Proxy.

To add a new proxy speed dial entry:

1.

Click the 'Speed Dial' tab.

2.

Click the 'New Entry' link to add a new speed dial entry. The 'Speed Dial

Settings' screen will appear

3.

Enter the following parameters:

- Speed Dial: A shortcut number which you will dial to call this party.

- Destination: The entry's destination, in this case a proxy server.

- User ID: Specify the remote party's user ID.

4.

Click 'OK' to save the settings.

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Speed Dial via Local Line.

To add a new local line speed dial entry:

1.

Click the 'New Entry' link on the 'Speed Dial' tab and select the 'Local Line' option

from the combo-box.

2.

Enter the following parameters:

- Speed Dial: A shortcut number which you will dial to call this party.

- Destination: The entry's destination, in this case a local line.

- Line: A combo-box will display your pre-defined local lines. Select the desti-

nation line.

3.

Click 'OK' to save the settings.

Speed Dial via Direct Call.

To add a new direct call speed dial entry:

1.

Click the 'New Entry' link on the 'Speed Dial' tab and select the 'Direct Call' option

from the combo-box.

2.

Enter the following parameters:

- Speed Dial: A shortcut number which you will dial to call this party.

- Destination: The entry's destination, in this case a direct call.

- User ID: Specify the remote party's user ID.

- IP Address or Host Name: Specify the remote party's IP Address or host

name.

3.

Click 'OK' to save the settings.

MONITORING

It is possible to access to the line monitoring page by selecting the ‘Monitoring’

Tab panel: the Registration Status and Call State for each line are shown.

FIGURE 3.

Monitoring Panel

ADVANCED

The IP Telephony tab of the Voice over IP screen allows configuration of dialing

parameters, VoIP Signaling Protocol, media streaming parameters and codecs.

The following sections describe these various parameters.

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Voice over IP Section

FIGURE 4.

Advanced Panel

Dialing Parameters.

Dialing Timeouts:

Dialing timeout specifies the duration (in seconds) of

allowed inactivity between dialed digits. If the limit is exceeded, the dialing pro-

cess will time out and you will hear a warning tone. When you work with a proxy

or gatekeeper, the number you have dialed before the dialing process has timed

out is sent to the proxy/gatekeeper as the user ID to be called. This is useful for

calling a remote party without creating a speed dial entry (assuming the remote

party is registered with the proxy/gatekeeper).

Phone Number Size:

The maximum length of shortcut numbers that you can

enter and the maximum number of digits that you can dial.

Signaling Protocol.

The signaling protocol options available in the combo-box,

are determined by the VoIP stack on your gateway.

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Voice over IP Section

A different subset of parameters will become visible with each of the combo-box

choices. To apply the change of protocol you must press either 'OK' or 'Apply'. If

the applied protocol is of another stack, the Router will reboot after you accept

the reboot warning.

RTP.

Local RTP Port Range defines the port range for Real Time Protocol

(RTP) voice transport.

Quality of Service.

Type of Service (HEX) This is a part of the IP header that

defines the type of routing service to be used to tag outgoing voice packets orig-

inated from the Router. It is used to tell routers along the way that this packet

should get specific QoS. Leave this value as 0XB8 (default) if you are unfamiliar

with the differentiated Services IP protocol parameter.

Codecs.

Codecs define the method of relaying voice data. Different codecs have

different characteristics, such as data compression and voice quality. For exam-

ple, G.723 is a codec that uses compression, so it is good for use where band-

width is limited but its voice quality is not as good compared to other codecs

such as the G.711.