Dolby Digital Conference Phone 3.1 Service manual

Dolby Conference
Phone 3.1
administrator's guide
12 January 2017

Copyright
©2017 Dolby Laboratories. All rights reserved.
For information, contact:
Dolby Laboratories, Inc.
1275 Market Street
San Francisco, CA 94103-1410 USA
Telephone [phone]
Fax [phone]
http://www.dolby.com
Trademarks
The following are trademarks of Dolby Laboratories:
Dialogue Intelligence™
Dolby®
Dolby Advanced Audio™
Dolby Atmos®
Dolby Audio™
Dolby Cinema™
Dolby Digital Plus™
Dolby Digital Plus Advanced Audio™
Dolby Digital Plus Home Theater™
Dolby Home Theater®
Dolby Theatre®
Dolby Vision™
Dolby Voice®
Feel Every Dimension™
Feel Every Dimension in Dolby™
Feel Every Dimension in Dolby Atmos™
MLP Lossless™
Pro Logic®
Surround EX™
All other trademarks remain the property of their respective owners.
Dolby Voice®and the Dolby Voice logo are registered trademarks of Dolby Laboratories.
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Contents
1 Introduction 6
1.1 About this guide 6
1.2 New in this version 6
1.3 Related documentation 7
1.4 Deployment guides 7
1.5 Problem reports 8
2 Solution architecture 9
2.1 Dolby Conference Phone software application 9
2.2 Network configurations 9
2.3 Operational modes of the Dolby Conference Phone 10
2.3.1 Integrating with your conferencing service provider 11
2.3.2 Supported IP PBX call control platforms 11
3 Preparation and requirements 13
3.1 Installation and setup process 13
3.2 Conference room requirements 13
3.3 Power requirements 14
3.4 Network requirements 14
3.5 Supported DHCP parameters 15
3.6 Network ports used 16
3.7 Bandwidth planning and codec selection 16
3.8 Primary and secondary VLANs 17
4 Configuring the phone with Dolby Conferencing Console 21
4.1 Reasons for using Dolby Conferencing Console 21
4.1.1 The purpose of a provisioning server 21
4.1.2 What is Dolby Conferencing Console? 21
4.1.3 How the phone connects to Dolby Conferencing Console
22
4.2 Supported provisioning protocols with Dolby Conferencing Console
22
4.3 Updating software using Dolby Conferencing Console 23
5 Automatic setup 24
5.1 Mechanisms for automatic setup 24
5.2 DNS SRV 24
5.3 DHCP option 66 25
5.4 Out-of-the-box discovery of the provisioning server 25
5.5 Rediscovering the provisioning server 26
6 Configuring phone features 27
6.1 Configurable phone features 27
6.1.1 Configuration parameters 27
6.1.2 Deprecated configuration parameters 29
6.2 Configuring certificates 29
6.2.1 Adding certificate authority certificates 29
6.2.2 Viewing certificate authority certificates 30
6.2.3 Device certificate 31
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6.3 Configuring phone preferences 31
6.3.1 Using the recent calls list 31
6.3.2 Enabling user feedback 32
6.3.3 Using call forwarding 32
6.3.4 Enabling automatic answer 33
6.3.5 Enabling do not disturb 33
6.3.6 Setting the language 34
6.3.7 Setting the time and date display 35
6.4 Options for provisioning 35
6.4.1 Scheduling a software update 35
6.4.2 Setting recurring provisioning 36
6.4.3 Disabling the reboot prompt 36
6.5 Phone access control 37
6.5.1 Changing the administrative password 37
6.6 Directory options 37
6.6.1 Using a corporate directory 38
6.6.2 Adding the corporate directory configuration 38
6.6.3 Using the contact directory 39
6.6.4 Creating a local contact directory by using the provisioning
server 40
6.7 Configuring PBX server redundancy 40
7 Deploying the phone 42
7.1 First-time use of the phone 42
7.1.1 Setting up the phone automatically 43
7.1.2 Connecting the phone to the network manually 44
7.1.3 Connecting the phone to Dolby Conferencing Console or
the provisioning server manually 46
7.2 Deploying in a secure network 47
7.2.1 Deploying with 802.1X authentication 47
7.2.2 HTTPS provisioning 49
7.3 Changing network configuration after out-of-the-box setup 50
7.3.1 Configuration and rediscovery of the provisioning server
50
7.3.2 Network configuration 50
7.3.3 Configuring IP Network options 50
7.3.4 Configuring LLDP and VLAN options 51
7.3.5 Configuring the secondary VLAN 52
7.3.6 Configuring the time server 53
7.3.7 Configuring 802.1X after out-of-the-box setup 54
7.3.8 IEEE 802.1p/Q 55
7.3.9 Configuring proxy autoconfiguration (PAC) and web proxy
autodiscovery (WPAD) protocol 55
7.3.10 Proxy authentication 56
8 Administering the phone 57
8.1 Error messages 57
8.2 Viewing the Status menu 61
8.3 Log files 63
8.3.1 Parameters for changing the log level 63
8.3.2 Log levels 64
8.3.3 About syslog logging 64
8.3.4 Audio logging 65
8.4 Accessing the Dolby Conference Phone web interface 65
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8.5 Exporting the Dolby Conference Phone configuration 68
8.6 Rebooting the Dolby Conference Phone 69
8.7 Call and media statistics 70
8.8 Viewing diagnostics 71
8.9 Diagnostic shell 71
8.10 Phone memory resources 72
8.11 Resetting to factory defaults 73
8.12 DHCP assignment of a VLAN ID 73
8.13 LLDP and supported type-length values 74
8.13.1 Supported type-length values 75
8.14 Trusted certificates and issuers 77
8.14.1 TLS cipher suites 79
9 Configuring the Dolby Conference Phone provisioning server 82
9.1 Reasons for using a provisioning server 82
9.2 Building the provisioning server 82
9.2.1 Requirements for provisioning servers 83
9.2.2 Supported provisioning protocols 83
9.3 Security for provisioning servers 83
9.4 Setting up an FTP server 83
9.5 HTTPS server setup 84
9.6 Master configuration file 84
9.6.1 Setting up the CA certificate files for the phone to
download 86
9.7 Template files 86
9.8 Configuration file (JSON) 87
9.9 Recommended file and directory layout 87
9.10 Redundant provisioning servers 88
9.11 Log directory 88
9.12 Updating preinstalled software using a provisioning server 88
9.12.1 Available software packages 89
9.12.2 Upgrading and downgrading phone software 89
9.13 Sample configurations 90
9.13.1 Directory structure 91
9.13.2 Master configuration file 91
9.13.3 Simple IP PBX–only configuration 91
10 Troubleshooting 94
10.1 Phone issues and solutions 94
10.1.1 Power and start-up issues 94
10.1.2 Hardware issues 94
10.1.3 Network access issues 95
10.1.4 Provisioning issues 97
10.1.5 Authentication issues 100
10.1.6 IP PBX calling issues 101
10.1.7 Audio quality issues 103
10.1.8 Software update issues 104
10.1.9 Corporate directory issues 104
10.1.10 Fatal error issues 105
10.1.11 Dolby Satellite Microphone issues 105
10.2 Decommissioning and disposing of the phone 105
Glossary 107
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1 Introduction
The Dolby Conference Phone offers an intuitive touch-screen interface that lets you easily
join and manage meetings. The phone is a dual-mode device that can be used for Dolby Voice
meetings and for traditional telephony.
•About this guide
•New in this version
•Related documentation
•Deployment guides
•Problem reports
1.1 About this guide
IT administrators can use this documentation as a guide for setting up and provisioning the
Dolby Conference Phone.
We assume that users of this guide are IT administrators or equivalent and are familiar with:
•Basics of computer networking and Linux administration
•Internet Protocol (IP) private branch exchange (PBX) call controls used by your
organization
•Conferencing service provider functionality used by your organization
This guide provides information about:
•Configuring the phone with Dolby Conferencing Console
•Using Dolby Conferencing Console to manage the phone or groups of phones
•Configuring the phone with a provisioning server
•Using the phone user interface (UI) and phone web interface
•Configuration parameters and configuring phone features
•Troubleshooting common issues with the phone
1.2 New in this version
This release of the Dolby Conference Phone includes several new and updated features,
including:
•Expanded support of dual-virtual LAN
•Expanded support of CA certificates
•Expanded support of 802.1x authentication
•Support for the G.729ab audio codec in IP PBX environments
•Firmware improvements
These topics are new or have been updated:
Configuring Proxy autoconfiguration and Web Proxy autodiscovery protocol
Proxy authentication on page 56 (New topic!)
1.1 About this guide
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Trusted certificates and issuers on page 77
TLS cipher suites on page 79
Network access issues on page 95
Primary and secondary VLANs on page 17
Deprecated configuration parameters on page 29 (New topic!)
1.3 Related documentation
Review all of the Dolby Conference Phone documents to ensure that the phone is set up
correctly and that you have the best conferencing experience possible.
These documents are available:
•
Dolby Conference Phone quick start guide
This guide describes the contents of the phone package, how to assemble the phone, and
how to connect the phone to the network. The quick start guide is included in the phone
package. It is also available from the Dolby Conference Phone support pages.
•
Dolby Conference Phone user's guide
This guide describes how to use the basic and advanced phone features, and how to
customize the phone.
•
Dolby Conference Phone open source software guide
This guide describes the open source software used in the Dolby Conference Phone
software.
•
Dolby Satellite Microphones quick start guide
This guide describes the contents of the microphone package and how to connect them
to the Dolby Conference Phone. The quick start guide is included in the microphone
package. It is also available from the Dolby Conference Phone support pages.
•
Dolby Voice compatibility guide
This guide describes the compatibility relationships between the various Dolby Voice
products.
1.4 Deployment guides
For information about integrating the Dolby Conference Phone with your conferencing
service provider and a supported IP PBX, see the deployment guide for your call control
platform.
The following deployment guides are available:
•
Configuring the Dolby Conference Phone for BT MeetMe with Dolby Voice
•
Configuring the Dolby Conference Phone with Cisco Unified Communications Manager
•
Configuring the Dolby Conference Phone with Avaya Aura Platform 6
•
Configuring the Dolby Conference Phone with Unify OpenScape
•
Configuring the Dolby Conference Phone for iMeet
•
Configuring the Dolby Conference Phone for West conferencing
1.3 Related documentation
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1.5 Problem reports
Before you report problems to your conferencing service provider, please be prepared to
provide basic information about the phone, configuration files and logs, and a full
description of the issue.
•Basic information about the phone:
•Phone serial number
•Version of software currently on the phone
•Configuration files and logs:
•Phone configuration: Provide the relevant configuration files from the provisioning
server for the phone, or export your entire configuration.
•Any relevant log files showing the problem occurring. If you have not enabled logging,
you should enable it for the phone experiencing the issue, reproduce the issue, and
provide those logs.
•Have you been able to reproduce the problem? If so, please detail how.
•Is there anything that you think might be relevant in the log? Did anything unusual
occur? Did the system generate any high-severity log messages? If so, please attach
an extract.
•Description of the issue:
•When did the problem occur? How often does it occur? Is there any pattern or trend to
the occurrence?
•What was the scope of the problem? How many users did it affect? Was there any
pattern or trend to the affected users?
•Any symptoms observed.
•Any error messages displayed on the phone UI or web interface.
•Any obvious triggers. (What was the user doing before the error message displayed?)
•If the issue was reproducible. (Does it happen regularly or after certain tasks are
performed?)
•How widespread the issue appears to be. (Does it affect a single user only or the whole
organization?)
•Any other information you have that might assist in understanding the issue.
•What operating system and version are being used by the client? What browser and
version are being used by the client?
•What kind of Internet connection is the client using (ADSL/cable/wireless/mobile)?
•What other observations have you made? Is there anything else you think might assist
us in identifying the root cause of the problem?
Related information
First-time use of the phone on page 42
Master configuration file on page 91
Exporting the Dolby Conference Phone configuration on page 68
Log files on page 63
1.5 Problem reports
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2 Solution architecture
The Dolby Conference Phone supports advanced functionality, including local conferencing,
multiple call appearances, Hypertext Transfer Protocol Secure (HTTPS) secure provisioning,
and deployment in conference service provider and IP PBX environments.
•Dolby Conference Phone software application
•Network configurations
•Operational modes of the Dolby Conference Phone
2.1 Dolby Conference Phone software application
The Dolby Conference Phone software consists of two basic components: the application
that loads the phone software when the phone is first powered on and implements the
phone functions and features, and the configuration files that contain the phone settings.
The phone software application manages the protocol stack, the DSP, the UI, and the
network interaction. This application implements these functions and features:
•Voice over Internet Protocol (VoIP) signaling for a range of voice telephony functions
using Session Initiation Protocol (SIP) signaling for call setup and control
•Industry-standard security techniques for ensuring that all provisioning, signaling, and
media transactions are authenticated and encrypted
•Advanced audio signal processing for communications using a group of audio codecs
•Flexible provisioning methods to support various deployment scenarios
The phone software application also performs these tasks once you power up or reboot the
phone:
•Enables you to set various network and provisioning options
•Formats the file system, and removes any application and configuration files if new
updates are downloaded
•Determines what files on the provisioning server are required by the phone
•Downloads the application and configuration files
•Installs the application, and uploads an event log file from the boot cycle to the
provisioning server
The phone software application is a binary file image and contains a digital signature that
prevents tampering or the loading of rogue phone software images. There is a new image file
in each new release of phone software.
2.2 Network configurations
From an administrator’s perspective, the Dolby Conference Phone is a SIP endpoint in a
network that interoperates with other compatible hardware, such as application servers,
media servers, gateways, switches, voice bridges, and other endpoints.
For the Dolby Conference Phone to successfully operate as a SIP endpoint in the network,
you will require:
2.1 Dolby Conference Phone software application
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•A working IP network
•Network routers and switches configured for VoIP
•VoIP gateways configured for SIP
•Adequate firewall security
•The latest Dolby Conference Phone software image (or a compatible version)
•An active, configured call server to receive and send SIP messages
•Dolby Conferencing Console or provisioning server on the IP network
There are many ways to set up a phone network using the Dolby Conference Phone. This
figure is just one example of a network setup.
Figure 1: Dolby Conference Phone in a network
2.3 Operational modes of the Dolby Conference
Phone
The operational modes of the Dolby Conference Phone can integrate with the conferencing
service provider as a conference endpoint, register to an IP PBX call control platform as a SIP
endpoint, or do both simultaneously.
The mode the phone operates in determines what features are supported. For example, if
the operational mode is set to Conferencing Only Mode, then the phone cannot be
configured to connect to an IP PBX, and features such as forwarding and transferring will be
unavailable. Similarly, if the operational mode is set to IP PBX Only Mode, then the phone
cannot be configured to connect to a Dolby Voice enabled conferencing service provider.
2.3 Operational modes of the Dolby Conference Phone
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For more information, see the deployment guide for your call control platform.
This table lists the parameter you can configure for this feature.
Configuration parameter description Configuration parameter name
Selects the operational mode Features.OperationMode
Web interface
To set the operational mode from the web interface, go to Settings > Features and select the
appropriate option.
Related information
Deployment guides on page 7
2.3.1 Integrating with your conferencing service provider
You can integrate the Dolby Conference Phone with your conferencing service provider. For
information, see the deployment guide for your conferencing service provider.
Related information
Deployment guides on page 7
2.3.2 Supported IP PBX call control platforms
An IP PBX provides audio communications through a Transmission Control Protocol/Internet
Protocol (TCP/IP) protocol stack for endpoints on internal networks and interconnects with a
public switched telephone network (PSTN) for telephony connections for external endpoints.
The Dolby Conference Phone supports these IP PBX call control platforms:
Cisco Unified Communications Manager
Cisco Unified Communications Manager is an IP‐based communications system integrating
voice, video, data, and mobility products and applications.
Supported versions: The Dolby Conference Phone interoperates with Cisco Unified
Communications Manager 7.1, 8.5/8.6, 9.1, 10.5, and 11.
Avaya Aura Platform
Avaya Aura Platform is an IP‐based communications system integrating voice and video
endpoints.
Supported versions: The Dolby Conference Phone interoperates with Avaya Aura Platform
6.1, 6.2, and 6.3.
Unify OpenScape Enterprise Express
Supported versions: The Dolby Conference Phone interoperates with Unify OpenScape
Enterprise Express 8.0.x.
Standard SIP call control platform
The Dolby Conference Phone is a SIP compliant endpoint and interoperates with any call
control platform designed to comply with RFC 3261. For Transport Layer Security (TLS)
transport, the phone is limited by the existing security configuration, and this information
should be noted:
2.3 Operational modes of the Dolby Conference Phone
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•If the phone transport is configured as AUTO, TLS transport will be attempted only if the
phone fails to connect to TCP and User Datagram Protocol (UDP) transports.
•The CA certificate of the Session Initiation Protocol server must be downloaded to the
phone through provisioning.
•TLS 1.0, 1.1, and 1.2 are supported. TLS 1.2 is the preferred protocol, but version 1.0 or 1.1
may be used depending on the peer's support.
•As the phone acts as a client, it is up to the server to decide whether or not mutual
authentication is required. (Normally, SIP servers are configured with client
authentication only.)
•The use of certificate revocation lists (CRLs) is not supported.
•Simple Certificate Enrollment Protocol (SCEP) and Online Certificate Status Protocol
(OCSP) are not supported.
•The phone device certificate cannot be replaced at this time.
•If you try to setup IP PBX with explicit TLS transport instead of taking advantage of the
Auto transport feature, you must set the transport port explicitly. If you change your
configuration from TLS to Auto then you need to set the port back to the correct default
port.
The best practice is to use Auto transport, which is the system default.
Contact your network administrator to find out what port is used for the TLS connection
in your environment.
When TLS is operational on the phone, Secure Real-time Transport Protocol (SRTP) is
enabled; when TLS is not operational on the phone, SRTP is disabled. By default, if TLS is
enabled, SRTP is set to Mandatory. The Dolby Conference Phone offers a predefined list of
cipher suites.
Related information
TLS cipher suites on page 79
2.3 Operational modes of the Dolby Conference Phone
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3 Preparation and requirements
Before you use the Dolby Conference Phone, review the requirements for room size, power,
and network connectivity.
•Installation and setup process
•Conference room requirements
•Power requirements
•Network requirements
•Supported DHCP parameters
•Network ports used
•Bandwidth planning and codec selection
•Primary and secondary VLANs
3.1 Installation and setup process
Once you have received a Dolby Conference Phone, you can set it up in a conference room or
an executive’s office.
Before you begin, read the
Dolby Conference Phone quick start guide first. This printed guide
is shipped in the phone package.
The Dolby Conference Phone is a class 3 PoE device, which consumes a maximum of 12.95 W.
The phone reports this through Link Layer Discovery Protocol (LLDP) type length value (TLV)
as 13 W.
Make note of the media access control (MAC) address of each phone that you want to deploy.
The MAC address is the 12‐digit hexadecimal number on a label on the underside of the phone
and on the outside of the shipping box.
Note: Depending on how you want each phone to behave (that is, which features are
enabled), you may need the MAC address of each phone that you want to deploy. If you
want different features on some phones, you will need a list of all MAC addresses.
If you plan to support one or two Dolby Satellite Microphones with the phone, read the Dolby
Satellite Microphone quick start guide first. The phone must be running Dolby Conference
Phone 2.1 or later software.
Related information
Power requirements on page 14
3.2 Conference room requirements
Before you install the Dolby Conference Phone, make sure that the room does not exceed the
maximum recommended room size. If the room is large, you may need satellite microphones
in addition to the conference phone.
We recommend that you place the phone on a solid table in the center of the room.
Small, medium, and large conference rooms
The maximum room size is 20 × 30 feet (6 × 9 m).
Only one Dolby Conference Phone is required.
Large conference rooms and boardrooms
The maximum room size is 20 × 40 feet (6 × 12 m).
3.1 Installation and setup process
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Installing the Dolby Conference Phone with two Dolby Satellite Microphones is ideal.
Choosing a Dolby Conference Phone solution based on the size of the room is important
because it ensures natural and effective conversational flow for the usual seating positions
in the room. Participant behavioral factors and environmental factors influence the overall
voice quality in the room and impact your experience. For example:
•Participant seating position
•Participant voice volume
•Ambient noise level
•Reverb level
•Floor, wall, and ceiling materials
•Ceiling fans
•Projector placement
When the Dolby Conference Phone is deployed in acoustically challenging rooms, we
recommend testing the setup to determine whether the actual results meet your
requirements.
3.3 Power requirements
The Dolby Conference Phone requires PoE, which can be obtained by a network port
supporting PoE, or a PoE adapter from a wall socket.
Follow the instructions in the Dolby Conference Phone quick start guide to connect the
phone to the network using a PoE source.
If a PoE source is not available, connect the phone to an AC power source. To connect the
phone to an AC power source, you will need an AC power kit that includes a power adapter, a
regional power cord, and an Institute of Electrical and Electronics Engineers (IEEE) 802.3af–
compliant power injector cable (for example, the Phihong Single Port 15.4 W PoE Adapter
PSA16U IEEE 802.3af compliant). Follow the power injector cable instructions carefully.
Note: AC power and PoE adapters are not included in the phone package. If you require
one, contact your phone reseller.
3.4 Network requirements
The Dolby Conference Phone is a VoIP device. It connects physically through a Cat5 cable to a
standard office twisted‐pair (IEEE 802.3) 10/100/1,000 Mbps Ethernet local area network
(LAN), and it sends and receives all data using the same packet‐based technology.
IP network requirements differ according to the partner application to be used.
You should have a Dynamic Host Configuration Protocol (DHCP) server and Domain Name
System (DNS) server already set up within your organization.
Network connectivity should be available to all locations where you intend to deploy the
Dolby Conference Phone.
Connecting the Dolby Conference Phone to the LAN will initiate this sequence of events:
1. The phone establishes network connectivity.
2. DHCP negotiations occur between the network and Internet Protocol (IP) address,
network addressing options, default network gateway address, and time server.
3.3 Power requirements
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3. Appropriate security and Quality of Service (QoS) settings are applied.
4. The connection to the provisioning server is attempted.
5. The phone provisioning process starts.
The Dolby Conference Phone will not function until this link is established.
The phone is configured to automatically negotiate the Ethernet speed and duplex mode so
that no special configuration is required. Although you have the option to change the line
speed and duplex configuration on the switch network port, we recommend that you keep
the autonegotiation settings. If you do change the settings, you should do so before
deploying the phones.
If your organization uses an HTTP or HTTPS proxy server to manage Internet traffic, see the
requirements for proxy authentication.
If your organization separates voice and data traffic by the use of VLANs, see the
requirements for primary and secondary VLANs.
Related information
Deployment guides on page 7
Primary and secondary VLANs on page 17
Configuration parameters on page 27
Proxy authentication on page 56
3.5 Supported DHCP parameters
When the Dolby Conference Phone has established network connectivity, it needs to acquire
several IP network settings to be fully functional. These settings are typically obtained
automatically from a DHCP server.
If some DHCP parameters are unavailable, you have the option to set these DHCP parameters
manually from the phone UI or in the phone web interface.
When making the DHCP request, the phone will include information in option 66 that can
assist the DHCP server in delivering the appropriate settings to the phone.
This table details the settings that are configurable through the DHCP protocol for the phone
and where they are used.
Table 1: DHCP network parameters
Parameter DHCP option
Subnet mask 1
IP gateway 3
Provisioning server address and path 66
DNS server IP address 6
DNS domain 15
VLAN ID and QoS (proprietary) 128 to 207
Network Time Protocol (NTP) servers 42
Proxy autoconfiguration 252
Tip: For more information on DHCP options, see RFC 2131 and RFC 2132.
3.5 Supported DHCP parameters
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Related information
Accessing the Dolby Conference Phone web interface on page 65
Automatic setup on page 24
DHCP option 66 on page 25
3.6 Network ports used
The network port used by the Dolby Conference Phone depends on protocol, data type, and
whether it is sent by UDP or TCP.
Table 2: Network ports used by the phone
Port number Protocol Data UDP or TCP
22 SSH Diagnostics TCP
80*HTTP Not applicable TCP
443 HTTPS Not applicable TCP
5,060 SIP SIP signaling UDP or TCP
5,061 SIP over TLS Secure signaling TCP
16,400–16,431** RTP/RTCP Media, audio UDP
*Port 80 is always redirected to port 443.
** Real-time Transport Protocol (RTP) ports are always even numbers; RTP Control Protocol (RTCP)
ports are always the odd numbers. The numbers always start from 16,400/16,401 and move on to
16,402/16,403 and so forth until they reach the end of the range. At this point, they revert back to
16,400/16,401 and start over again.
3.7 Bandwidth planning and codec selection
Bandwidth planning depends on the audio codecs used.
Table 3: Audio codecs supported by the phone
Algorithm Raw bit rate IP bit rate*Sampling
rate Supported payload size Effective audio
bandwidth
G.711μ‐law
RFC 1890 64 kilobits per second
(kbps)
80 kbps 8 kHz 10 ms
20 ms (default)**
30 ms
40 ms
50 ms
60 ms
80 ms
4 kHz
G.711a‐law
RFC 1890 64 kbps 80 kbps 8 kHz 10 ms 20 ms (default)**
30 ms
40 ms
50 ms
60 ms
80 ms
4 kHz
3.6 Network ports used
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Table 3: Audio codecs supported by the phone (continued)
Algorithm Raw bit rate IP bit rate*Sampling
rate Supported payload size Effective audio
bandwidth
G.722 RFC
3551 48, 56, 64 kbps 64, 70, 80 kbps 16 kHz 10 ms 20 ms (default)**
30 ms
40 ms
50 ms
60 ms
80 ms
8 kHz
G.729ab 8 kbps 26.8 kbps 8 kHz 10 ms
20 ms (default)**
30 ms
40 ms
50 ms
60 ms
80 ms
4 kHz
Internet low
bit-rate
codec (iLBC)
RFC 3952
15.2 kbps 24 kbps 8 kHz 20 ms (default)** 4 kHz
DVC‐2 in 2.0
and later
(proprietary)
48 kbps 179 kbps
(peak)
64 kbps
(average)
16 kHz 20 ms (default)** 8 kHz
*The IP bit rate depends primarily on the tunnel type used.
** The Dolby Conference Phone always sends 20 ms payloads to the peer.
Note: During a call, the LED halo glows blue if the DVC-2 codec is being used, and glows
green if a different codec is being used.
3.8 Primary and secondary VLANs
The Dolby Conference Phone requires Internet access to connect to the conferencing service.
In some environments, voice and data traffic are handled by different VLANs.
If the voice VLAN lacks Internet connectivity, modify firewall policies to allow the phone to
connect to your conferencing service. Alternatively, you can set up the phone on the data
VLAN instead. If neither of these solutions works for you, then you need a dual VLAN setup.
Once you enable a dual VLAN, communication over the Internet with servers for your
conferencing service provider passes through the secondary VLAN. Also review Configuring
the secondary VLAN.
When the secondary VLAN is enabled, the primary VLAN is designated as the voice VLAN, and
the secondary VLAN is designated as the data VLAN. When the secondary VLAN is disabled,
the phone can be placed on either data VLAN or voice VLAN. If your organization has a strict
policy on segregating voice and data VLANs, and you want to configure the phone for both IP
PBX and conferencing service, enable the secondary VLAN. With separate VLANs, the phone
will have two IP addresses, one on each VLAN.
The secondary VLAN has these limitations:
•Only DHCP is supported on the secondary VLAN for device IP assignment.
•The secondary VLAN shares all QoS settings with the primary VLAN. QoS automatic
discovery is not available on secondary VLAN.
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There are two status fields that you can check to verify the status for the primary and
secondary VLAN:
DNS Server Status
Displays status of DNS for the primary VLAN.
Note: If the same DNS server is configured on both the primary VLAN and secondary
VLAN, all DNS queries go through the primary VLAN.
Default Gateway Status
If secondary VLAN is configured, and DNS is not shared between primary and secondary
VLAN, use this field to check DNS status of the secondary VLAN.
The Status screen with the VLAN settings is shown in this figure.
Figure 2: Status screen displaying VLAN settings
Network traffic is allocated onto different VLANs based on the traffic type, as listed in this
table.
Table 4: Traffic-type-to-network-interface mapping
Traffic type Network interface Comment
DHCP Primary and secondary Works independently on both
Web Proxy Automatic
Discovery (WPAD) Primary and secondary Works independently on both
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Table 4: Traffic-type-to-network-interface mapping (continued)
Traffic type Network interface Comment
Proxy automatic configuration
(PAC) Primary and secondary Works independently on both*
DNS** Primary and secondary DNS queries made on the
network interface where the
DNS requestor application
runs
Conferencing services Secondary
Lightweight Directory Access
Protocol (LDAP) directory Secondary
Web server Primary and secondary
SSH server Primary and secondary
Syslog Primary
NTP Primary
Provisioning Primary
SIP call Primary
*PAC on primary VLAN works for proxy determination of FTP/HTTP-based provisioning. PAC on
secondary VLAN works for proxy determination of some conferencing service providers.
** If the primary virtual LAN shares the same DNS settings, then DNS traffic will run on primary
virtual LAN only.
Check these items to determine whether your network is ready for dual VLAN deployment:
•Set up the Dolby Conference Phone on the tagged voice VLAN with proper IP PBX
configuration, and confirm that IP PBX calls can be successfully made:
•By default, the Dolby Conference Phone discovers voice VLAN through LLDP.
•If LLDP does not offer tagged voice VLAN information, the Dolby Conference Phone will
try the DHCP option 132 to discover VLAN.
•If the DHCP server is not set up to offer the VLAN information, the device can use the
manually configured VLAN.
•For IP PBX configuration instructions, see Deployment guides on page 7.
•Keep the Dolby Conference Phone on the same Ethernet switch port, then set up the
Dolby Conference Phone on the data VLAN (usually. the untagged VLAN):
•If the Dolby Conference Phone discovers the Voice VLAN using LLDP, you can disable
LLDP under Administrative settings > Network configuration > Ethernet > LLDP
enabled.
•If the Dolby Conference Phone discovers the Voice VLAN using DHCP, you st disable
that by setting the DHCP VLAN option under Administrative settings > Network
configuration > IP Network > DHCP VLAN option.
•Once the device is successfully set on the data VLAN, configure the necessary settings
for connecting to your conference service provider.
If both tests work, you have the correct setup to proceed with the dual VLAN configuration.
Note: When the dual VLAN feature is used in conjunction with a Cisco switch port with
802.1X authentication enabled, it works only if the Ethernet port on the switch is
configured to Single-Host or Multiple-Hosts mode. If the port is set to Multidomain
Authentication or Multiauthentication mode, dual VLAN will not work on the phone.
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Related information
Deployment guides on page 7
Troubleshooting on page 94
Configuring the secondary VLAN on page 52
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