Vigor2710 Series User’s Guide

54

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.

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.

Vigor2710 Series User’s Guide

55

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

Note:

This function is used for “V” models.

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

Vigor2710 Series User’s Guide

56

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), while the MGCP protocol uses client-server architecture, the calling scenario

being very similar to the current PSTN 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.

Vigor2710 Series User’s Guide

57

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

2710Vn/2710VDn for setting the phone book.

Vigor2710 Series User’s Guide

58

Click any index number to display the dial plan setup page.

Enable

Click this to enable this entry.

Phone Number

The speed-dial number of this index. This can be any number

you choose, using digits

0-9

and

*

.

Display Name

The Caller-ID that you want to be displayed on your friend’s

screen. This let your friend can easily know who’s calling

without memorizing lots of SIP URL Address.

SIP URL

Enter your friend’s SIP Address.

Dial Out Account

Choose one of the SIP accounts for this profile to dial out. It is

useful for both sides (caller and callee) that registered to

different SIP Registrar servers. If caller and callee do not use