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Page 51 / 275 Scroll up to view Page 46 - 50
Vigor2110 Series User’s Guide
44
Enable Dynamic
DNS Account
Check this box to enable the current account. If you did
check the box, you will see a check mark appeared on the
Active column of the previous web page in step 2).
Service Provider
Select the service provider for the DDNS account.
Service Type
Select a service type (Dynamic, Custom or Static). If you
choose Custom, you can modify the domain that is chosen in
the Domain Name field.
Domain Name
Type in one domain name that you applied previously. Use the
drop down list to choose the desired domain.
Login Name
Type in the login name that you set for applying domain.
Password
Type in the password that you set for applying domain.
4.
Click
OK
button to activate the settings. You will see your setting has been saved.
The Wildcard and Backup MX features are not supported for all Dynamic DNS providers. You
could get more detailed information from their websites.
Disable the Function and Clear all Dynamic DNS Accounts
In the DDNS setup menu, uncheck
Enable Dynamic DNS Setup
, and push
Clear All
button
to disable the function and clear all accounts from the router.
Delete a Dynamic DNS Account
In the DDNS setup menu, click the
Index
number you want to delete and then push
Clear All
button to delete the account.
3.4.2 UPnP
The
UPnP
(Universal Plug and Play) protocol is supported to bring to network connected
devices the ease of installation and configuration which is already available for directly
connected PC peripherals with the existing Windows 'Plug and Play' system. For NAT routers,
the major feature of UPnP on the router is “NAT Traversal”. This enables applications inside
the firewall to automatically open the ports that they need to pass through a router. It is more
reliable than requiring a router to work out by itself which ports need to be opened. Further,
the user does not have to manually set up port mappings or a DMZ.
UPnP is available on
Windows XP
and the router provide the associated support for MSN Messenger to allow full
use of the voice, video and messaging features.
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Vigor2110 Series User’s Guide
45
Enable UPNP Service
Accordingly, you can enable either the
Connection Control
Service
or
Connection Status Service
.
After setting
Enable UPNP Service
setting, an icon of
IP Broadband Connection on Router
on Windows XP/Network Connections will appear. The connection status and control status
will be able to be activated. The NAT Traversal of UPnP enables the multimedia features of
your applications to operate. This has to manually set up port mappings or use other similar
methods. The screenshots below show examples of this facility.
The UPnP facility on the router enables UPnP aware applications such as MSN Messenger to
discover what are behind a NAT router. The application will also learn the external IP address
and configure port mappings on the router. Subsequently, such a facility forwards packets from
the external ports of the router to the internal ports used by the application.
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Vigor2110 Series User’s Guide
46
The reminder as regards concern about Firewall and UPnP
Can't work with Firewall Software
Enabling firewall applications on your PC may cause the UPnP function not working
properly. This is because these applications will block the accessing ability of some network
ports.
Security Considerations
Activating the UPnP function on your network may incur some security threats. You should
consider carefully these risks before activating the UPnP function.
¾
Some Microsoft operating systems have found out the UPnP weaknesses and hence
you need to ensure that you have applied the latest service packs and patches.
¾
Non-privileged users can control some router functions, including removing and
adding port mappings.
The UPnP function dynamically adds port mappings on behalf of some UPnP-aware
applications. When the applications terminate abnormally, these mappings may not be
removed.
3.5 VoIP
Voice over IP network (VoIP) enables you to use your broadband Internet connection to make
toll quality voice calls over the Internet.
There are many different call signaling protocols, methods by which VoIP devices can talk to
each other. The most popular protocols are SIP, MGCP, Megaco and H.323. These protocols
are not all compatible with each other (except via a soft-switch server).
The Vigor V models support the SIP protocol as this is an ideal and convenient deployment
for the ITSP (Internet Telephony Service Provider) and softphone and is widely supported.
SIP is an end-to-end, signaling protocol that establishes user presence and mobility in VoIP
structure. Every one who wants to talk using his/her SIP Uniform Resource Identifier, “SIP
Address”. The standard format of SIP URI is
sip: user:password @ host: port
Some fields may be optional in different use. In general, "host” refers to a domain. The
“userinfo” includes the user field, the password field and the @ sign following them. This is
very similar to a URL so some may call it “SIP URL”. SIP supports peer-to-peer direct calling
and also calling via a SIP proxy server (a role similar to the gatekeeper in H.323 networks),
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Vigor2110 Series User’s Guide
47
while the MGCP protocol uses client-server architecture, the calling scenario being very
similar to the current PSTN/ISDN network.
After a call is setup, the voice streams transmit via RTP (Real-Time Transport Protocol).
Different codecs (methods to compress and encode the voice) can be embedded into RTP
packets. Vigor V models provide various codecs, including G.711 A/μ-law, G.723, G.726 and
G.729 A & B. Each codec uses a different bandwidth and hence provides different levels of
voice quality. The more bandwidth a codec uses the better the voice quality, however the
codec used must be appropriate for your Internet bandwidth.
Usually there will be two types of calling scenario, as illustrated below:
z
Calling via SIP Servers
First, the Vigor V models of yours will have to register to a SIP Registrar by sending
registration messages to validate. Then, both parties’ SIP proxies will forward the
sequence of messages to caller to establish the session.
If you both register to the same SIP Registrar, then it will be illustrated as below:
The major benefit of this mode is that you don’t have to memorize your friend’s IP
address, which might change very frequently if it’s dynamic. Instead of that, you will
only have to using
dial plan
or directly dial your friend’s
account name
if you are with
the same SIP Registrar.
z
Peer-to-Peer
Before calling, you have to know your friend’s IP Address. The Vigor VoIP Routers will
build connection between each other.
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Vigor2110 Series User’s Guide
48
Our Vigor V models firstly apply efficient codecs designed to make the best use of
available bandwidth, but Vigor V models also equip with automatic QoS assurance.
QoS Assurance assists to assign high priority to voice traffic via Internet. You will
always have the required inbound and outbound bandwidth that is prioritized exclusively
for Voice traffic over Internet but you just get your data a little slower and it is tolerable
for data traffic.
3.5.1 DialPlan
This page allows you to set phone book and digit map for the VoIP function. Click the
Phone
Book
and
Digit Map
links on the page to access into next pages for dialplan settings.
Phone Book
In this section, you can set your VoIP contacts in the “phonebook”. It can help you to make
calls quickly and easily by using “speed-dial”
Phone Number
. There are total 60 index entries
in the phonebook for you to store all your friends and family members’ SIP addresses.
Loop
through
and
Backup Phone Number
will be displayed if you are using Vigor 2820V for
setting the phone book.

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