Using SIP and Web-Based Clients with
the Dialogic Public Video Conferencing
Demos
Introduction
This guide will tell you how to download, configure and use several SIP and Web-Based video soft phone
clients that work well with the Dialogic Public Video Conferencing Demos. Once setup is complete, you
will be able to easily access a variety of video demos on the Dialogic Public Demo server using your
phone.
The clients will also work well with Dialogic HMP-based video media server products – HMP
Powermedia, Powermedia XMS and Diastar - that are locally installed or are part of a cloud-based
installation.
The demos themselves showcase Dialogic’s video features:
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Video conferencing and conference recording
IVVR (interactive voice and video response) apps using multimedia play and record
Video transcoding between H.263, H.264 and MPEG-4
Displaying streaming video
VGA (640x480) video resolution
Ability to communicate with a Flash-SIP gateway to serve Flash video to standard web browsers
Each of the phones below has been tested for full interoperability with the PowerMedia family:
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Dialogic VoipSwitch/Vippie SIP softphone – an Apple iPhone and iPad app
Linphone – an open source SIP video client for PC
Bria 3 – a SIP video client for PC
Adobe SIP-Flash Gateway – a browser-based flash phone requiring no download or
configuration on the client PC
Other industry-standard SIP phones have worked well with Dialogic HMP-based media servers. This
document just concentrates on the above phones that have been thoroughly tested. Other will be
added as they are qualified with the demos.
System Overview
Here is a diagram showing the full system:
3G
Radio Access
Network
Public Demo Servers
PowerMediaServer
Radio
Network
Controller (RNC)
Asterisk Application Server
Flash- SIP
Gateway
Base Station
iPhone/iPad with
Vippie/Dialogic
client
SIP/RTP or RTMP
Over IP
SIP Video client
RTMP
Dialogic BorderNet
500
WiFi
Access Point
Public IP
Network
PC with Flash
browser plug-in
WiFi
The Dialogic BorderNet500 Session Border Controller is used as part of the PowerMedia Public Demo
system. It provides several essential capabilities needed by a public media server:
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Firewall capabilities - prevents direct access to media servers
SIP Registrar capabilities – controls SIP client connectivity and security
Shaping and controlling SIP signaling – allows for variations in SIP
Remote (client side) NAT firewall traversal and media relay – allows for far better SIP and HTTP
connectivity for a variety of clients in a variety of network situations
The PowerMedia media server and Asterisk application server reside in the same system. SIP requests
arrive and are serviced according to the business logic encoded into the Asterisk dialplan.
A Flash-SIP gateway based on Adobe technology allows delivery of SIP-based media from the
PowerMedia server to any web browser that supports a Flash plug-in. This removes the need for a SIP
phone or SIP app to view videos or conferences. Instructions for using the gateway from a web browser
are also included in this document.
SIP SoftPhone Considerations
Desktop SIP phones are ready-to-go packages that include all audio and video hardware needed for the
phone’s use. On the other hand, SoftPhones are just one of many possible applications on a desktop or
laptop PC, or iPhone/iPad. Some thought must be put into to properly setting up audio and video for the
best use of the phone.
Mobile Network Connectivity
iPhones and iPads allow for two different methods of connecting to the public internet. The first is
through the 3G data plan that is purchased monthly through AT&T or Verizon. The second is through a
more direct internet connection when the phone is in the proximity of a WiFi transceiver which the
phone’s user is able to access.
There are advantages and disadvantages to each access method:
Method
3G
WiFi
Advantages
Available anywhere with sufficient signal
strength
No client-side firewall issues
Disadvantages
3G data charges from the carrier apply
Bandwidth likely better than 3G
Available only at WiFi hotspots
No charges based on amount of data
transferred
Depending on location – corporate network,
for example – may be firewall issues
preventing calls
Bandwidth variable depending on location
The Phones
VoipSwitch Vippie (Dialogic Version)
iPhones, iPads and iOS Supported
The Apple iPhone 3GS, 4 and 4s and the iPad 2 work with Dialogic/Vippie and PowerMedia. A minimum
iOS version of 4.2 must be installed. Note that the iPhone 3GS does not have a front-facing camera,
making it less useful for 2-way video applications such as video conferencing.
Obtaining the Dialogic/VoipSwitch Vippie iPhone App
The Dialogic/VoipSwitch Vippie Video softphone application is available from the Apple iTunes App
store:
http://itunes.apple.com/us/app/dialogic/id449939134?mt=8
A minimum version of 1.21.230 must be installed. It can be purchased and downloaded in the same
manner as any iPhone/iPad app.
Configuration
Once the app has been installed on your iPhone, some configuration - a valid SIP account - is necessary
before it can be used with the PowerMedia Public Demo. Start by tapping “Log in” to enter Settings.
The Account Settings should be set as follows:
1. Account Settings
a. Username
b. Password
c. Auth. Username
d. Server
e. Port
Any desired username
leave blank
leave blank
demo.dialogic.com
5060
When finished, tap “Done” in the Settings screen. Vippie is ready to use.
Linphone - a PC-Based SIP Video SoftPhone
Linphone is a free, open source SIP softphone. It can be downloaded here. For best results, you
should also download and install the open source H.264 video codec, as its quality is far better
than the default H.263 that comes with linphone. The Windows binary version of the codec can
be found here or here.
Configuration
Once you have installed the phone and the H.264 codec, configuration is done as follows:
 Linphone -> Preferences -> Manage SIP Accounts -> Add
 Your SIP Identity: sip:yourname@demo.dialogic.com
 SIP Proxy address: sip:demo.dialogic.com
 Check off "Register at startup"
 Linphone -> Preferences -> Codecs -> Audio codecs
 Disable all audio codecs except PCMU
 Linphone -> Preferences -> Codecs -> Video codecs
 Disable all video codecs except H264
 Click "Done"
You should see "Registration on sip:demo.dialogic.com successful" at the bottom of the window.
You are now ready to try the demos.
Bria 3 - a PC-Based SIP Video SoftPhone
A commercially available SIP Video Softphone for use with the Dialogic® PowerMedia server is the Bria 3,
found at here. The Softphone is compatible with Windows and MAC.
Configuration
Once it is installed, the following changes should be made:
 Softphone -> Preferences -> Application -> Default Action -> Make a Video Call
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Softphone -> Preferences -> Audio Codecs -> G722 enabled (all others disabled)
Softphone -> Preferences -> Video Codecs -> H.264 enabled (all others disabled)
Softphone -> Preferences -> Media Quality -> Video Quality -> High Resolution
Softphone -> Account Settings -> Add SIP Account
 Account Name -> any name
User Details -> User ID -> any name
User Details -> Domain -> demo.dialogic.com
 Domain Proxy -> Register with domain and receive calls
 Softphone -> Account Settings -> Enabled (all others disabled)
Bria will register with the SIP registrar when Account Settings is closed and is ready to make a call.
Accessing the Demos Using a Web Browser
The video conferencing demos on the Public Demo Server may also be accessed through any
web browser that supports an Adobe Flash plug-in, such as Firefox or Internet Explorer. A
"Flash Phone" application is downloaded to and brought up in the browser. You may then use
the phone much like a PC-based SIP softphone. The one limitation is that you are only able to
get video in the download direction, so you will not be able to participate in a video conference
or make a video recording.
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Make sure your browser has an Adobe flash plug-in installed in your browser. You can download
it here.
Point your browser at http://demo.dialogic.com:10480/flashPhone.html
A Sample Flash Phone should appear
In the Server URI field, enter rtmp://demo.dialogic.com:1935/telephony
Hit the Connect button. You should see a dialpad and Your phone ID is: XXXX in the upper
left corner
You are now registered with the Diastar Demo and can enter any of the demo extensions
Remember that audio/video is one way – download toward the browser. So, participating in a
video conference or making a video recording will not work. The controlled conference demo is
best for the flash phone – there is an option for an “Attendee” – which is listen/view only
Trying Your First Video Call
All phones will register with the PowerMedia Public Demo server when configuration is finished and
when the app is first started. When this is successful, a simple numerical extension need only be
entered into the phone. The full IP address or domain name is not needed.
Enter “600” and tap the phone’s Call button. (usually green in color) After a short intro video clip, the
main videoconferencing demo menu will be seen:
PowerMedia video apps
A number of apps are available as parts of the PowerMedia video demo suite:
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Animal Conference– a video conference in which you are joined by 3 talkative animals
PIN-Based Conferencing– The first caller is assigned a conference ID number. Up to 4
subsequent callers entering the same ID are allowed into the same conference room
Conference Recording – records and replays a video conference
Controlled Conferencing – demonstrates the PowerMedia conferencing options that can be
used for a conference with a moderator, presenters and view/listen-only attendees