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PRG AV4202N
© (2007) Pirelli Broadband Solutions S.p.A. All Rights Reserved. Proprietary Use Pursuant to Cover Page Instructions.
Voice over IP Section
OGU 930500275-A1
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FIGURE 4.
Advanced Panel
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PRG AV4202N
© (2007) Pirelli Broadband Solutions S.p.A. All Rights Reserved. Proprietary Use Pursuant to Cover Page Instructions.
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Voice over IP Section
Signaling Protocol.
The signaling protocol options available in the combo-box,
are determined by the VoIP stack on your gateway.
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
originated 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
example, G.723 is a codec that uses compression, so it is good for use where
bandwidth is limited but its voice quality is not as good compared to other co-
decs such as the G.711.
Silence Suppression.
The Silence Suppression feature allows optimization to
be made when no speech is detected. With this feature enabled, the Router is
able to detect the absence of audio and conserve bandwidth by preventing the
transmission of "silent packets" over the network.
Echo Cancellation.
Echo Cancellation is the elimination of reflected signals
(echoes) made noticeable by delay in the network. his also improves the band-
width of the line. When the delay of a voice call exceeds acceptable limits, the
router will protect the far end from receiving any echo generated at the local end
and sent back through the network.
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Parental Control Section
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81
Parental Control Section
Parental Control
Section
This chapter will describe the
Parental Control
accessible from the
Home Page
of the
PRG AV4202N
.
The abundance of harmful information on the Internet is posing a serious chal-
lenge for employers and parents alike - "How can I regulate what my em-
ployee/child does on the net?" Discus Web-filtering allows parents and employ-
ers to regulate, control and monitor Internet access. By classifying and catego-
rizing online content, it is possible to create numerous Internet access policies,
and easily apply them to your home network computers. As a result, you may
keep your children from harm's way by limiting access to adult and violent mate-
rial, or increase employee productivity by regulating access to non work-related
Internet content.
To effectively filter Web content one must first have a good idea of the kind of
information that is available on the Internet. It is necessary to formulate a land-
scape of the accessible content, categorize and classify themes and subjects
that may be considered inappropriate.
Discus Parental Control categorization methodology provides an easy and
straightforward method for fine-grained content filtering. The Parental Control
module is constantly updated with URL-based information classified according
to the following categories:
Child protection
Recreation and Entertainment
Personal business
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PRG AV4202N
© (2007) Pirelli Broadband Solutions S.p.A. All Rights Reserved. Proprietary Use Pursuant to Cover Page Instructions.
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Parental Control Section
Bandwidth control
Advertisements
Chat
Remote Proxies and Hosting Sites (possibly untrusted sources)
Other
Each category can be expanded into subcategories for better content control.
For instance, the 'Recreation and Entertainment' category is comprised of sub-
categories such as:
Arts and Entertainment
Education
Games
Hobbies and Recreation
GENERAL OVERVIEW
Discus Parental Control service is provided by "
Surf Control
", a company spe-
cializing in Internet content filtering. Therefore, you must subscribe to this ser-
vice in order to use this feature. You can subscribe through Discus WBM, as
described in the following section.
1.
Under the 'Services; tab, click the 'Parental Control' menu item. The Paren-
tal Control's 'General' screen appears.
2.
In the 'Activate' section, select the 'Enable Web Content Filtering' check
box, and click 'Apply'. A 'Server Status' section is added.
3.
If you have not subscribed yet or your subscription has expired, click the
'Click Here to Initiate and Manage your Subscription' link in the 'Subscribe'
section. The Web filtering subscription site will then be displayed in a new
browser window.
4.
Follow the instructions on the site and subscribe for a free trial. You will be
sent a verification email. Click the link in the verification email. Your sub-
scription will be activated soon after clicking the verification link.
5.
Return to Discus WBM, and click the 'Parental Control' menu item under the
'Services' tab. The 'Filtering Policy' screen should be displayed with sub-
scription expiry date at the top. If this is not the case, click the 'Advanced
Options' link and then the 'Refresh Servers'button. Wait a few seconds and
repeat this step.
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PRG AV4202N
© (2007) Pirelli Broadband Solutions S.p.A. All Rights Reserved. Proprietary Use Pursuant to Cover Page Instructions.
Parental Control Section
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83
FIGURE 1.
General Panel
FILTERING POLICY
A filtering policy defines which sites will be blocked based on their category.
Discus provides four built-in policies:
Home
Blocks sites under the 'Child Protection' category.
Employee
Blocks sites from non work-related categories.
Block All
Blocks all access to the Internet.
Allow All
Allows unlimited Internet access.
These policies can be set from the 'Default Filtering Policy' drop-down menu in
the 'Filtering Policy' screen. To view or edit the 'Home' and 'Employee' policies,
click their respective links in this screen. To create your own filtering policy, per-
form the following:
1.
Click the 'Filtering Policy' link under the 'Parental Control' menu item.
2.
Click the 'Add a policy' link.

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