BT MeetMe with Dolby Voice - IT Administrators

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BT MeetMe with Dolby Voice
IT Administrator Guide
Published by BT Conferencing
BT MeetMe with Dolby Voice
IT Administrator Guide
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Issue 3.8, April 2016
BT MeetMe with Dolby Voice - IT Administrators Guide
Table of Contents
Product Description __________________________________________________________ 3
BT MeetMe with Dolby Voice Architecture ________________________________________ 4
Pre-Installation for Desktop ___________________________________________________ 8
Installation for Desktop______________________________________________________ 10
Post-Installation for Desktop _________________________________________________ 12
Pre-Installation for Mobile Devices _____________________________________________ 12
Installation for Mobile Devices ________________________________________________ 13
Additional Environment Details _______________________________________________ 14
Troubleshooting ___________________________________________________________ 23
Known Limitations__________________________________________________________ 24
Glossary __________________________________________________________________ 27
APPENDIX A: Customer Readiness Checklist for BT MeetMe with Dolby Voice ___________ 28
About this guide
This document provides an introduction and overview for IT administrators and desktop managers to
deploy and support BT MeetMe with Dolby Voice. It is intended to provide guidance only and not
intended to replace the Customer-specific design documents.
© British Telecommunications plc 2016.
Registered office: 81 Newgate Street, London EC1A 7AJ.
Registered in England No: 1800000.
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Product Description
In partnership with Dolby®, BT Conferencing (BTC) has enhanced the BT MeetMe Audio Conferencing
Service with new technology to deliver more natural sounding and effective audio conference meetings.
BT MeetMe with Dolby Voice service provides conference participants with spatial sound via stereo
headsets and voice separation with clear, high-quality sound.
BT MeetMe with Dolby Voice reduces background noise with clear voice separation so each voice will
seem to come from a different direction. This unique technology replicates the auditory experience of
sitting around the conference table to make it easier to
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understand who is talking - so more time can be focused on what is being said,
identify when people are trying to join in with the conversation - so everyone can participate
more easily, and
understand what is said if more than one person talks at the same time.
By providing conference calls with the feel of “face to face” meetings, calls will be less tiring and more
interactive.
BT MeetMe with Dolby Voice is ideal for:
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Workshops / brainstorming sessions where active participation by all is required.
Executive meetings where a fully engaged audience is needed in order to make the right
decisions.
Project management with a broad range of individuals working together coming at the problem
from very different perspectives.
Global teams when English may not be everyone’s first language and accents can be confusing.
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BT MeetMe with Dolby Voice Architecture
The BT MeetMe with Dolby Voice platform is built upon the existing BT Conferencing Session Border
Controller (SBC) infrastructure. The SBC infrastructure establishes a secure perimeter around the BTC
network. The secure perimeter can identify and stop attacks before they can affect core services and
spread to user devices. The SBC allows only valid signaling, valid media traffic and authorized devices to
reach the network core. Collectively these functions help prevent several types of directed attacks:
•
•
•
Denial-of-service attack (DoS) or distributed DoS (DDoS)
Toll fraud via rogue media streams
Malformed packet protection
The BTC MeetMe Bridge platform sits behind the BTC SBC and is a SIP-based platform which supports
both standard TDM and VoIP telephony users. This ensures that participants can join a BT MeetMe with
Dolby Voice conference irrespective of whether they are using the BT Dolby Voice clients or joining via
PSTN or On Net. It is important to note that participants who join a BT MeetMe with Dolby Voice
conference via PSTN or On Net will not experience the same spatial sound, voice separation, or highquality sound as those participants who join via their BT MeetMe with Dolby Voice client and approved
stereo headset
BT MeetMe with Dolby Voice Desktop client
The BT MeetMe with Dolby Voice Client is a web browser plug-in which implements the proprietary
Dolby DVC-2 codec as well as the necessary network protocols to enable communications between the
Conference Participant’s device and the BT MeetMe with Dolby Voice platform. The BT MeetMe with
Dolby Voice client also manages the audio hardware on the Participant’s device.
Virtual Desktop Infrastructure (VDI)
The BT MeetMe with Dolby Voice Client has been designed for utilization on VDI environments as well
as standard desktop installation.
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BT MeetMe with Dolby Voice Application for Mobile Devices
The BT MeetMe with Dolby Voice application implements the proprietary Dolby DVC-2 codec as well as
the necessary network protocols to enable communications between the Conference Participant’s
smartphone and the BT MeetMe with Dolby Voice platform. The BT MeetMe with Dolby Voice mobile
application also manages the audio hardware on the Participant’s smartphone.
When participants initiate the app and select “I’ll connect using the app” option, the smartphone will
use Voice over IP (VoIP) to connect to the meeting over their public Internet connection. Participants
who select this option will experience high quality sound and background noise reduction. For those
participants who select this option and use stereo ear buds, they will also experience voice separation
where the voices of the conference participants will come from different directions. Participants who
select either of the other 2 options, “I’d like the meeting to call me” or “I’ll dial into the meeting”, will
have a standard audio experience.
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BT MeetMe with Dolby Voice Conference Phone
The Dolby Conference Phone is a standalone device that can be used either as a standard IP telephony
phone or as an endpoint for the BT MeetMe with Dolby Voice service. The Dolby Conference Phone
gives remote participants the ability to understand multiple people speaking at the same time and
enhances the ease of conversation between those in the conference room and those calling in remotely.
Guidance on how to set up and provision a Dolby Conference Phone can be obtained at
http://www.btconferencing.com/downloads-library/firmware/dolby-phone/
Secure Access to BT MeetMe with Dolby Voice Platform
The BT Tunnel Gateway provides secure access for SIP calls to the BT MeetMe with Dolby Voice
platform. When conference participants join a conference, the SIP control signalling and RTP voice
media signalling is routed via an encrypted tunnel. The SIP traffic within the encrypted tunnel will be
unencrypted by the tunnel gateway before being passed to the Session Border Controller and
terminated on the BT MeetMe Bridge.
NOTE: Internet access is required via port 7955 (UDP/DTLS is recommended) for BT Dolby Voice Client to
function correctly. Port 443 (TCP/TLS) is the failover port if port 7955 is inaccessible. TCP/TLS is not
recommended for VoIP as audio quality may degrade.
Desktop Client – ‘How it Works’
BTC audio conferencing participants will download the BT Dolby Voice client onto their devices. Once
participants have downloaded the client and selected their USB headset, they will be able to initiate the
BT Dolby Voice client to join their conference call. BT MeetMe with Dolby Voice calls are initiated when
participants browse to the BT Conferencing website (https://my.webjoin.com) and enter the
appropriate chairperson or participant conference call details.
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The BT Dolby Voice Desktop client will establish a session and conference participant’s credentials will
be validated and authenticated. The BT Dolby Voice Client will receive the conference connection
details and a connection will be made to the BT MeetMe bridge via a secure tunnel.
Mobile Application – ‘How it Works’
BTC audio conferencing participants can download the BT MeetMe with Dolby Voice mobile application
onto their devices by going to the App Store on iTunes for iOS devices or to the Google Play Store for
Android devices. Once participants have downloaded and installed the application, they will be able to
initiate the BT MeetMe with Dolby Voice App to join their conference call. BT MeetMe with Dolby
Voice calls are initiated when participants use the app, enter the appropriate chairperson or participant
credentials and then select one of 3 options.
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NOTE:
Join Option selected
I’ll connect using the app
I’d like the meeting to call me
I’ll dial into the meeting
Call Routing
Data connection using Dolby Voice
Initiates dial back to device over mobile phone network
Initiates dial into the meeting over mobile phone network
If “I’ll connect using the app” is selected , then the BT MeetMe with Dolby Voice app will establish a
session and the participant’s credentials will be validated and authenticated. The BT MeetMe with
Dolby Voice app will receive the conference connection details and a connection will be made to the BT
MeetMe bridge via a secure tunnel.
Pre-Installation for Desktop
Prior to installing the BT Dolby Voice Desktop client application you need to ensure that your
environment is properly prepared. The sections that follow describe the pre-install checks to make
before beginning the BT Dolby Voice Client installation process.
Pre-Install Check 1: Verify System Requirements
Confirm that all the requirements detailed in the table below are satisfied.
Requirements
Description
BT Dolby Voice
Desktop client
Release 2.4.1 (customers on Release 2.3.3 are not required to upgrade).
NOTA BENE: New versions of the client are periodically released.
Upgrade steps are
provided when users access the client.
Supported
Operating
System(s) and
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BT MeetMe with Dolby Voice is supported for the following operating systems:
Requirements
Web Browsers
Description
Computer
Hardware:
Processor
Computer
Hardware:
Memory
Internet
Connectivity
2 GB
The BT MeetMe with Dolby Voice web interface uses HTTPS over port 443. The BT
MeetMe with Dolby Voice SIP and RTP traverses the BTC Tunnel Gateway as follows:
 DTLS over UDP port 7955 (recommended) or
 TLS over TCP port 443 (for failover or if DTLS over UDP port 7955 is
unavailable).
Participants must be able to navigate to the following URLs which should be
considered trusted sites:
https://www.btconferencing.com
https://www.webjoin.com
https://my.webjoin.com
https://*.webjoin.com
Headsets
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In order to experience the spatial sound and voice separation, it is necessary to have a
headset that has two independent channels. Mono headsets or stereo headsets that
Requirements
Description
play the same audio for each ear will not provide a spatial experience. USB stereo
headsets are preferred.
The following list of headset models has been tested by Dolby.
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Cookies
Enabled
JavaScript
Enabled
Jabra BIZ 2300 Duo
Jabra BIZ 2400 Duo
Jabra BIZ 2400 II Duo
Jabra Evolve 30 Stereo
Jabra Evolve 40 UC
Jabra Evolve 80
Jabra UC Voice 750 Duo
Jabra UC Voice 550 Duo
Logitech H650e
Plantronics C725M
Plantronics C325M
Plantronics Voyager Focus
Plantronics C520
Plantronics C520M
Plantronics C320
Plantronics C320M
Plantronics C325
Plantronics C720
Sennheiser SC60
Cookies setting must be enabled. Please refer to BT Conferencing’s Privacy Policy for
more details about when BTC uses cookies (http://www.btconferencing.com/aboutus/privacy-policy/ )
JavaScript must be enabled on the web browser to support animation and User
Interface rendering
Pre-Install Check 2: BT Dolby Voice Client
Install the BT Dolby Voice Client. The core requirement is an installed and functional Dolby client.
Installation for Desktop
The BT Dolby Voice client is available to download from https://my.webjoin.com/dolby/download/.
Detailed instructions are located at http://www.btconferencing.com/meetme-with-dolby-voice/guide/.
Desktop client installation
The BT Dolby Voice Desktop client can be distributed automatically via your company’s Group Policy as
an unattended installation. The Client can also be installed manually using the client’s current software
deployment process. The client has the capacity to be installed silently (quiet mode).
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NOTE: The installation should be run as an administrator to install all of the components.
Install Process
To manually install the BT Dolby Voice Desktop client application on a participant’s desktop, follow the
steps below:
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Participant can go directly to https://my.webjoin.com/dolby/download/
Step 1: INSTALL THE DOLBY PLUGIN. Click on “Next”
Step 2: ACCEPT THE AGREEMENT. Click on “Accept and begin download”
Step 3: TEST THE SOUND.
o Select and test your speakers
o Select and test your microphone
Upon successful installation, the participant will see the BT MeetMe with Dolby Voice conference entry
webpage where they can enter their name, email and conference passcode.
NOTE: THE PROCESS TO INSTALL VIA YOUR COMPANY’S GROUP POLICY WILL BE PROVIDED DURING CUSTOMER
ENGAGEMENT.
Uninstall Process
If you need to remove the BT Dolby Voice Desktop client application from a participant’s desktop, follow
the steps below.
Windows Uninstall process
1.
2.
3.
4.
5.
6.
7.
8.
Click ‘start’ at the bottom left hand corner of your Windows display.
Select 'Control Panel' in the Windows menu that displays.
Select ‘Programs and Features’ for Windows
Select ‘Dolby Voice Conference Plugin’.
Right-Click 'Remove' or ‘uninstall’ button.
Message displays, "Are you sure you want to remove Dolby Voice 2.4.11?' Click “Yes”.
Reboot if prompted.
BT Dolby Voice Client will no longer be installed.
Mac Uninstall process
1. Open Finder. In the menu, select Go, then Computer.
2. Click on the internal primary hard drive, usually named “Macintosh HD”.
3. Open the “Library” folder.
1
For Dolby Voice Client 2.3.3, message displays “Are you sure you want to remove Dolby Voice Client
2.3.3.0”
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4. Open the “Internet Plug-Ins” folder. This contains all the browser plug-ins and add-ons.
5. Scan the list of available applications to find Dolby Voice
6. Two ways to uninstall the program:
a. First option is to hold the Ctrl key while clicking on the file and a dialog box will pop up.
Select "Move to Trash".
b. Second option is to select the file in the Internet Plug-Ins folder and drag it to Trash on
the desktop
Post-Installation for Desktop
BT Conferencing strongly recommends fully testing any client specific configurations prior to
deployment to the entire enterprise.
Pre-Installation for Mobile Devices
Prior to installing the BT MeetMe with Dolby Voice Application for Mobile devices, you need to ensure
that your mobile device is properly prepared. The sections that follow describe the pre-install checks to
make before beginning the BT Dolby Voice application installation process.
Pre-Install Check 1: Device Check
The BT MeetMe with Dolby Voice application is not supported on a small number of devices with Intel
chips. The following devices are not currently supported and users will need to join via PSTN from their
mobile.
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Acer Liquid C1
ASUS FonePad
Casper VIA A6108
Etisalat E-20
Lenovo K900
Motorola RAZR I
Prestigio MultiPhone 5430
Safaricom Yolo
NOTE: THE LIST OF DEVICES NOT SUPPORTED IS SUBJECT TO CHANGE AND MAY NOT CONSTITUTE THE FULL LIST.
Pre-Install Check 2: Operating System
The BT MeetMe with Dolby Voice mobile application is supported on the following Operating System
(OS):
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Apple iOS 7.0 or later
Android 4.0.4+ or later
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Installation for Mobile Devices
The BT MeetMe with Dolby Voice application is available to download from the relevant App Store:
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Android: https://play.google.com/store/apps/details?id=com.bt.voiceapps.dolby. Can only be
downloaded if device is running Android v4 or later.
Apple: https://itunes.apple.com/app/id852241466. Can only be downloaded if your device is
running iOS v6.1 or later.
Install Process
To manually install the BT MeetMe with Dolby Voice application on a participant’s smartphone, follow
the steps below:
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2
Participant can go directly to either Apple or Google App stores
Step 1: SEARCH FOR THE APPLICATION. Search for “BT MeetMe with Dolby Voice”,
Step 2: FOLLOW INSTRUCTIONS. Click on “Accept and begin download”
Step 3a: COMPLETE INITIAL SCREEN. Enter name, email, mobile country, mobile number,
and permission for App to use Mobile Data 2
Step 3b: COMPLETE CHAIRPERSON ACCOUNT SCREEN3. Chairpersons must enter chairperson
passcode and email address associated with their chairperson account
If enabled, the App will use Mobile Data Allowance (3G/4G/LTE) when WiFI is unavailable
Chairperson account screen enables the ‘one click’ chair my meeting option on the app meeting join
screen
3
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Step 3a: COMPLETE INITIAL SCREEN
Step 3b: COMPLETE CHAIRPERSON ACCOUNT SCREEN
NOTE: BT HAS NO CONTROL OVER THE USER EXPERIENCE WHEN ON THE APP STORE OR DOWNLOADING THE APP. THE BT
DOLBY MOBILE APP IS NOT AVAILABLE IN ALL COUNTRIES. PLEASE SEE “KNOWN LIMITATIONS” FOR COUNTRY AVAILABILITY.
Detailed instructions are located at http://www.btconferencing.com/meetme-with-dolby-voice/guide/.
Additional Environment Details
Codecs
Participants joining conference call via BT MeetMe with Dolby Client
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Dolby DVC-2 with 20ms packetization rate
Participants joining conference call via PSTN or On-Net
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G.711 A-law
G.711 µ-law
Protocols (via encryption tunnel)
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SIP over TCP
SIP over UDP
SDP
RTP
Media Functionality
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Full duplex audio
Adaptive jitter buffer
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Automatic gain control
Audio leg mute
Voice record (based on BT MeetMe audio account setting)
Voice playback (based on BT MeetMe audio account setting)
Active speaker notification
Silence suppression
Server Statistics
Audio prompting through Dolby DVC-2
Active Speaker variable threshold for ASN
Bandwidth Utilization
CAUTION: BANDWIDTH CALCULATIONS AND FORMULAE ARE PROVIDED FOR ILLUSTRATIVE PURPOSES. THE ESTIMATES
CALCULATED FROM THE PROVIDED FORMULAE ARE NOT INTENDED TO REPLACE CUSTOMER-SPECIFIC BANDWIDTH
CALCULATIONS.
Bandwidth utilization depends upon how the conference calls will be routed over the Internet. Web
browser traffic can be supported via proxy. The bandwidth utilization for the web browser traffic
(https://my.webjoin.com) is:
Usage
Upstream Average (kbps) Downstream Average (kbps)
WebJoin (web browser traffic)
2.75
34.8
The BT MeetMe with Dolby Voice client has a variable bitrate that optimizes the use of available
bandwidth to transmit and receive voice traffic in a conference. Peak bitrates are relatively short in
duration and each call leg will experience the average bitrate for the majority of the time it is connected.
By comparison, a standard phone call (G.711) continuously uses 87 kilobits per second (kbps) both
upstream and downstream, and would need similar overhead to traverse firewalls if routed over the
Internet.
4
In order to estimate peak concurrent users based on monthly minutes, the industry uses a ratio of 4,000
minutes to 1 user (4,000:1). An alternate ratio of 20 concurrent users to 1 chairperson (20:1) may be
used to estimate peak concurrent users based on the number of conference hosts (chairpersons). The
formulae to estimate peak upstream and downstream bandwidth are:
4
For a conference call with up to 5 total conference participants. Add 2.8 kbps for each additional
participant above 5.
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The Average Upstream and Average Downstream rates are used to determine the minimum Peak
Upstream and Peak Downstream bandwidth utilization – this is the minimum bandwidth needed. IF the
network has less than this minimum, then conference participants will experience degradation of audio
quality. Peak bandwidth utilization should also be calculated with the Peak Upstream and Peak
Downstream rates to determine the “Worst Case Scenario” which would be if all conference participants
were speaking simultaneously. The “Worst Case Scenario” is statistically unlikely since it would entail all
conference participants to speak simultaneously. Using the “Worst Case Scenario” to dimension the
network is not recommended since it would over dimension the network to address very short duration
peak “bursts”.
However by calculating both the minimum bandwidth utilization and the “Worst Case Scenario”, the
bandwidth utilization range is determined.
The recommended bandwidth utilization would be within the calculated bandwidth utilization range and
should equal the minimum bandwidth plus a percentage for growth:
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If the available bandwidth is less than the minimum required, then conference participants will
experience persistent degraded audio quality;
If the available bandwidth is more than the “Worst Case Scenario”, then conference participants
should not experience any degradation of audio quality; and
If the available bandwidth is more than the minimum required but less than the “Worst Case
Scenario”, then conference participants could experience very short term and sporadic
degradation of audio quality.
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Another factor to take into consideration is the Internet connectivity. Different rates would be used to
calculate bandwidth utilization based on whether the SIP and RTP media traverse the BTC Tunnel
Gateway via DTLS over UDP port 7955 or via TLS over TCP port 443. The final factor to take into
consideration is whether the web browser traffic and voice media will be routed via the same path. IF
the web browser traffic and voice media are routed via the same path, then the upstream and
downstream rates would be combined. IF the web browser traffic and voice media are not routed via
the same path, then the upstream and downstream rates would be calculated separately for each path.
The upstream and downstream rates are in kilobits per second (kbps). The values were calculated from
4 actively speaking participants in a conference (i.e. there may be many participants in a conference but
it is unlikely to have more than 4 active speakers at the same time).
Usage
WebJoin (web browser traffic)
Dolby Voice Client with DTLS over UDP
(traversing firewalls)
Dolby Voice Client with TLS over TCP
(traversing firewalls)
WebJoin and DVC with DTLS over UDP
combined
WebJoin and DVC with TLS over TCP combined
Upstream
Average Peak
(kbps)
(kbps)
2.75
2.75
21.27
84.25
Downstream
Average
Peak (kbps)
(kbps)
34.8
63.65
See footnote3
134.58
26.10
103.35
48.72
116.02
24.02
87.00
98.45
169.38
28.85
106.10
83.52
150.82
For example, a company with 1 million minutes per month whose web browser and voice media (DTLS
over UDP) are routed via the same path would need a minimum Peak bandwidth of 6.005 Megabits per
second (Mbps) upstream and 24.6125 Mbps downstream.
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CALCULATIONS
Enter Average number of participants in a conference call
in the cell to the right:
Usage in monthly minutes
Enter Monthly Minutes in cell below:
4
Upstream
Average
Peak
Downstream
Average
Peak
(Minimum Req.)
(Worst Case)
(Minimum Req.)
(Worst Case)
Mbps
Mbps
Mbps
Mbps
0.6875
21.0625
25.8375
8.7
15.9125
12.18
8.7
33.645
29.005
Webjoin and DVC with DTLS over UDP combined
6.005
21.75
24.6125
Webjoin and DVC with TLS over TCP combined
7.2125
26.525
20.88
(Click on Microsoft Excel Object above to enter new monthly minutes for different calculations)
42.345
37.705
1,000,000
Web browser traffic and SIP/RTP via separate paths
Web Browser traffic
Dolby Voice Client with DTLS (traversing firewalls)
Dolby Voice Client with TLS (traversing firewalls)
0.6875
5.3175
6.525
Web browser traffic and SIP/RTP via SAME path
Security Safeguards
BT Conferencing follows industry standards for securing all data and customer information. The BTC
Tunnel Gateway encrypts all customer information that is transferred between the BT MeetMe with
Dolby Voice client and the BTC audio tunnel gateway.
The information that the web browser client transfers includes:
 Chairperson or Participant passcode, as entered on the web landing page
 Participant’s Email address , as entered on the web landing page
 Participant’s First and Last Name, as entered on the web landing page
 For PSTN dial-in, Participant’s calling line identification (CLI), if available
The information that the BT MeetMe with Dolby Voice client transfers includes:
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SIP address to the BT MeetMe with Dolby Voice service
Chairperson or Participant passcode
First and Last Names of each conference participant
Randomly auto generated identity tokens (non-persistent)
Proxy
Web browser traffic can be supported via proxy however the current version of the BT Dolby Voice
Client (2.0.0.0) does not support Voice media via proxy servers. Future proxy support is planned and
specific instructions on how to use a proxy server in conjunction with the BT MeetMe with Dolby Client
will be provided in a future update of this guide.
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Required Firewall Settings
For companies that block access to BT via proxy server, the URL *.webjoin.com must be opened in order
to utilize BT MeetMe with Dolby Voice service.
BT Dolby Voice Client Cookies
BT MeetMe with Dolby Voice may collect the following information from the local machine for the
purpose of customer support.
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OS Version
Browser Type and Version
Client Call ID
Audio Headset
Participant’s First and Last Name, as entered on the web landing page
Participant’s Email address , as entered on the web landing page
Please refer to BT Conferencing’s Privacy Policy for more details about when BTC uses cookies
(http://www.btconferencing.com/about-us/privacy-policy/ )
Conference User Features
These features are only available if you have joined the meeting with the Dolby user interface.
Once you have entered the meeting you will see:
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A list of who is on the call
In-call management features
The call status, headset settings and meeting details
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Conference features available to participants who join conference calls via PSTN or On-Net:
DTMF Tones
Join Conference
Description
Ability to join a conference via PSTN dial-in access number and passcodes.
Mute/Unmute
* 6 to mute and unmute themselves
Lock/Unlock Conference
(Chairperson only)
Participant Roll Call
(Chairperson only)
MeetMe Menu
* 7 to lock the conference to prevent other participants from joining the
conference
#2 to hear playback of recorded names as part of a participant roll call
Dial out
#3 Chairperson can have the conference bridge dial out to have another
person join the conference.
## Chairpersons can end the conference and disconnect all participants.
#9 Chairperson can allow the conference to continue for the other
participants even after the chairperson has disconnected.
*0 enables any participant to request help from the operator, who will
remove the requestor out of the conference to provide support and then join
them back to the conference.
*5 Conference chairperson can mute all other participants in presentation
mode
*8 Chairperson can initiate recording of the conference. Once recording is
initiated, a recorded notification will be played to participants to inform them
that the conference is being recorded.
Terminate Conference
Chair Hang Up
Operator Assistance
Enable/Disable
Presentation Mode
Record Conference
#0 will play the menu of available features and their DTMF commands.
Troubleshooting
This section covers commonly experienced issues related to installation or connectivity. Additional
troubleshooting tips may be found at http://www.btconferencing.com/meetme-with-dolbyvoice/guide/ under the “FAQs for computer” and “FAQs for smartphone”.
Symptom
Issue Type
Possible Cause(s)
Recommended Action
Installation fails
Installation
Restricted admin rights
Installation fails
Installation
Installation fails
Installation
Cannot connect to
BT Dolby Voice
Client or BT Dolby
Voice Client does
not display.
Cannot connect to
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Network
Connectivity
Unsupported Operating
System
Anti-virus blocks
installation
Access to Internet
terminated.
Contact your IT support team to
obtain their assistance to install
software with administrator login
Contact your IT support team for
assistance
Contact your IT support team for
assistance
BT Dolby Voice Client requires access
to the Internet to function. The client
may have lost connectivity at some
point. Exit the browser and restart it.
Network
Firewall (Local)
The BT MeetMe with Dolby Voice
Symptom
Issue Type
Possible Cause(s)
Recommended Action
Conference
Connectivity
Firewall (System)
Call drops
Connectivity
Low WiFi signal strength.
When signal strength is
-70 dBm or lower, audio
quality issues may occur.
Audio quality
(clipping)
Insufficient
bandwidth
Audio performance can
suffer when using WebEx
simultaneously to data
share during a BT
MeetMe with Dolby
Voice meeting
Audio quality
Connectivity
Low WiFi signal strength.
When signal strength is
-70 dBm or lower, audio
quality issues may occur.
Web interface uses HTTPS over port
443. The BT MeetMe with Dolby
Voice SIP and RTP traverses the BTC
Tunnel Gateway as follows:
• DTLS over UDP port 7955
(preferred) or
• TLS over TCP port 443 (for failover
or if DTLS over UDP port 7955 is
inaccessible).
If WiFi is used, the minimum signal
strength required is -69 dBm. Move
closer to the WiFi source. If on a
congested channel, try switching to a
different channel.
 Be aware of the upload and
download (www.speedtest.net)
 Use Presentation Share instead of
Desktop Share on Webex since it
uses less bandwidth
 If using Desktop Share, pay
particular attention to upload
speed. Insufficient bandwidth will
result in deterioration of audio
performance. Rule of thumb = if
less than 0.75MB upload, consider
dialing in via PSTN.
 Close unnecessary applications
that may be using bandwidth
elsewhere.
If WiFi is used, the minimum signal
strength required is -69 dBm. Move
closer to the WiFi source. If on a
congested channel, try switching to a
different channel.
Known Limitations
This section covers issues and limitations known as of the date of this publication.
Issue
Description
Single Conference
support
Multiple BT Dolby
Voice client plug-in
interactions
BT Dolby Voice client is designed to support only one active conference at a time
per device.
One and only one conference may be joined at any time. If plug-in B joins a
conference while plug-in A is already in conference, then plug-in A will be
disconnected from its conference and plug-in B will attempt to connect to its
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Issue
No proxy support
Preferred Audio
Device
Malfunctions
MAC OS X
sometimes captures
bad audio with USB
devices
Internet Explorer 10
(64-bit) issues
Description
conference.
The current version of the BT Dolby Voice Client (2.0.0.0) does not support
proxies.
If preferred audio device is malfunctioning, BT Dolby Voice will continue to try
using the preferred audio device instead of changing to another device.
There is a bug in OS X that results in bad audio being captured from USB devices.
The bad audio can start at any time and typically continues for a few minutes
before fixing itself.
Windows 8 does not allow IE10 to load a plug-in in “Enhanced Protected Mode”.
Enabling “Enhanced Protected Mode” is currently the only way to force Internet
Explorer in 64-bits mode.
When an end-user attempts to load an HTML page using the BT Dolby Voice
client, two things happens:
 A dialog box pops up a message stating that the BT Dolby Voice client is not
installed, and
 The browser shows a pop-up when loading the page asking "This webpage
wants to run ‘Dolby Voice Plugin’. If you trust this site you can disable
Enhanced Protected Mode for this site to run the control.
If the user selects "Disable", then the BT Dolby Voice client will work because
Internet Explorer 10 will load the 32-bit version of the client. Additionally,
Internet Explorer 10 will only allow the client to be loaded if the HTML page is
loaded from a remote server using the http(s) protocols but not when loading a
page from local disks using a file:// URI
After a fresh install of BT Dolby Voice client, Chrome must be restarted for both
Windows and MAC OS X.
Chrome browser restart after Client
installation
Noise cancellation is The noise cancellation module may take a little time to adapt to noisy conditions.
slow to start
This could result in a short burst of noise when a connection is started in a noisy
environment while the algorithm adapts. No action is needed by the user as the
noise cancellation module adapts.
Echo canceller
The echo canceller may take a little time to adapt, therefore echo could be heard
failure at start of
at the start of a call as the echo cancellation algorithm settles.
conference call
WiFi Connectivity
In addition to signal strength and bandwidth, there are other factors to consider
when using BT MeetMe with Dolby Voice over a WiFi connection:
Issues
1. Customer should ensure their WiFi Access Point is running at the highest
possible mode (e.g. Wireless-N) that can be supported by their WiFi adapter.
Customer should check with their Wireless Network Admin if they do not
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Issue
Description
have access to administer their WiFi network.
2. Customer should perform analysis on network congestion. If customer’s
Access Point supports multiple channels, customer should switch to a channel
that has the least amount of utilization. Customer should check with their
Wireless Network Admin if they do not have access to administer their WiFi
network.
3. Customer should move their Bluetooth, mobile phone, and/or cordless phone
away from their wireless adapter to limit signal interference. Customer
should also avoid other sources of Radio Frequency signal interference that
operate at frequencies used by their WiFi (e.g. 2.4 GHz) or at broadband
frequencies.
Firefox on Mac OS X
doesn’t recognize
Dolby Voice Client
though correctly
installed.
Dolby Mobile App is
currently available
in these countries
To fix for Firefox:
1. Open in Finder > Applications > Firefox
2. Select Firefox
3. Right-click or CTRL+click on it, select Get Info
4. Check Open in 32-bit mode
5. - Quit Firefox & restart
Albania, Angola, Argentina, Armenia, Australia, Austria, Azerbaijan, Bahrain,
Belarus, Belgium, Bolivia, Brazil, Bulgaria, Canada, Chile, China, Colombia, Costa
Rica, Croatia, Cyprus, Czech Republic, Denmark, Ecuador, Egypt, El Salvador,
Estonia, Finland, France, Germany, Ghana, Guatemala, Hong Kong, Hungary,
Iceland, India, Indonesia, Ireland, Israel, Italy, Jamaica, Japan, Jordan, Kazakhstan,
Latvia, Lebanon, Lithuania, Luxembourg, Malaysia, Malta, Mexico, Netherlands,
New Zealand, Nicaragua, Norway, Oman, Pakistan, Panama, Paraguay, Peru,
Philippines, Poland, Portugal, Republic of Korea, Romania, Russia, Singapore,
Slovakia, Slovenia, South Africa, Spain, Sri Lanka, Sweden, Switzerland, Taiwan,
Tajikistan, Thailand, Turkey, Turkmenistan, Ukraine, United Kingdom, United
States, Uruguay, Uzbekistan, Venezuela, Vietnam
NOTE: COUNTRY AVAILABILITY IS SUBJECT TO CHANGE. PLEASE CHECK CURRENT LIST AT:
http://www.btconferencing.com/downloads-library/apps/dolby-voice/
Enterprise Versions Organizations that deploy an enterprise version of the device operating software
of Device Operating may not be able to download the Dolby mobile app directly from the app stores
Systems
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Glossary
A list of terms that may be used in this document.
Term
Definition
API
Application Programming Interface– the interface implemented by a software program that enables
it to interact with other software.
BT
British Telecom
BTC
British Telecom Conferencing
Client
The software that accesses a remote service on another computer. The term ‘client’ is used
throughout this document to describe the BT Dolby Voice Client.
Central Processing Unit – the part of a computer system that carries out the instructions of a
computer program and is the primary element carrying out the computer’s functions.
CPU
DoS
Denial-of-service attack
DDoS
Distributed Denial-of-service attack
DTMF
Dual Tone Multi Frequency
IP
Internet Protocol
Kbps
Kilobits per second (kbps).
LAN
Local Area Network
Mbps
Megabits per second (Mbps).
OS
Operating System – software that consists of programs and data running on computers and
managing the computer hardware.
OSS
Operations Support System
PIN
Personal Identification Number
PSTN
Public Switched Telephony Network
QoS
Quality of Service
RTP
Real-Time Protocol
SBC
Session Border Controller
SDP
Session Description Protocol
SIP
Session Initiation Protocol – an IP telephony signaling protocol developed by the Internet
Engineering Task Force (IETF). SIP is a text-based protocol that is suitable for integrated voice-data
applications. SIP is designed for voice transmission and uses fewer resources.
Secure Sockets Layer – a cryptographic protocol that provides security for communications over
networks. It is the predecessor to the Transport Layer Security (TLS).
Time Division Multiplexing
SSL
TDM
URL
VoIP
Uniform Resource Locator– a Uniform Resource Identifier (URI) that specifies where an identified
resource is available.
Voice over Internet Protocol
WAN
Wide Area Network
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APPENDIX A: Customer Readiness Checklist for BT MeetMe with Dolby Voice
Category
Customer Selections
BT MeetMe with Dolby
Voice installation:
Desktop or Mac
☐ Windows 7, 8, 8.1, 10 (32- and 64-bit)
☐ Mac OS X 10.8 - 10.11 (64 bit only)
Mobile
☐ iOS Mobile: 7.0 - 9.1
☐ Android™ Mobile: 4.2 - 6.0
Windows Mobile – Not supported
Computer Hardware:
Processor
☐ Intel Processor
☐ Intel Core2 Duo-class 1GHz
Other – Please disucss with BT Account Manager
Computer Hardware:
Memory
☐ 2 Gigabytes (GB) +
Web Browser
(32 and 64 bit)
☐ Internet Explorer 8 - 11
If less than 2GB please discuss with BT Account Manager
☐ Chrome
☐ Firefox
☐ Safari
Firewall Configuration
(Internet Connectivity)
Internet Connectivity
Tested
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☐ DTLS over UDP port 7955 (recommended)
☐ TLS over TCP port 443 (for failover or if DTLS over UDP port 7955 is unavailable).
☐ Can navigate to and have made trusted ALL the following URLS:
https://www.btconferencing.com
https://www.webjoin.com
https://my.webjoin.com
https://*.webjoin.com
Category
Recommended USB
Stereo Headsets
Customer Selections
☐
☐
☐
☐
☐
☐
☐
☐
Jabra BIZ 2300 Duo
Jabra BIZ 2400 Duo
Jabra BIZ 2400 II Duo
Jabra Evolve 30 Stereo
Jabra Evolve 40 UC
Jabra Evolve 80
Jabra UC Voice 750 Duo
Jabra UC Voice 550 Duo
☐ Logitech H650e
Cookies
☐ Cookies are enabled
JavaScript
☐ JavaScript is enabled
29 | P a g e
☐
☐
☐
☐
☐
☐
☐
☐
☐
Plantronics C725M
Plantronics C325M
Plantronics Voyager Focus
Plantronics C520
Plantronics C520M
Plantronics C320
Plantronics C320M
Plantronics C325
Plantronics C720
☐ Sennheiser SC60