AudioCodes Device Duo Installation and operating instructions

Application Note
AudioCodes High Definition IP Phones Series
Device Duo
IP Phone as a Paired Audio Device

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Device Duo Application Note Contents
Table of Contents
1Introduction .........................................................................................................7
1.1 Benefits ..................................................................................................................7
1.2 ‘Paired Device’ vs. BToE ........................................................................................7
2Installing the Device Duo on the PC ..................................................................9
3Pairing the Phone with a Desktop Application ...............................................13
3.1 Viewing Account Status........................................................................................16
3.2 Selecting the Application with which to Pair the Phone.........................................16
3.3 Verifying Desktop App Settings ............................................................................18
3.3.1 Teams App Settings ............................................................................................18
3.3.2 Zoom App Settings..............................................................................................19
4Calling Features ................................................................................................21
4.1 Teams app ...........................................................................................................21
4.2 Zoom app .............................................................................................................22
5Configuring Line Types in Duo Mode..............................................................23
5.1 Configuring a Programmable Key as a Line..........................................................23
5.2 Viewing the Line and Determining its Status.........................................................25
6Making a Call .....................................................................................................27
6.1 Selecting a Line....................................................................................................27
6.2 Using a Line Programmable Key ..........................................................................28
6.3 Selecting an Audio Account through which to Speed Dial.....................................29
6.4 Using the PC ........................................................................................................30
7Handling Incoming Calls ..................................................................................31
8Joining a Meeting by PC...................................................................................33
9Managing Accounts ..........................................................................................37
10 Signing in on a Paired Phone...........................................................................39
11 Automatic Media Pause....................................................................................41
12 Volume Control..................................................................................................43
13 Limitations .........................................................................................................45
13.1 Device Duo with Teams App ................................................................................45
13.2 Device Duo with Zoom App ..................................................................................46

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Device Duo Application Note Notices
Notice
Information contained in this document is believed to be accurate and reliable at the time of
printing. However, due to ongoing product improvements and revisions, AudioCodes cannot
guarantee accuracy of printed material after the Date Published nor can it accept responsibility
for errors or omissions. Updates to this document can be downloaded from
https://www.audiocodes.com/library/technical-documents.
This document is subject to change without notice.
Date Published: April-28-2021
WEEE EU Directive
Pursuant to the WEEE EU Directive, electronic and electrical waste must not be disposed of
with unsorted waste. Please contact your local recycling authority for disposal of this product.
Customer Support
Customer technical support and services are provided by AudioCodes or by an authorized
AudioCodes Service Partner. For more information on how to buy technical support for
AudioCodes products and for contact information, please visit our Web site
https://www.audiocodes.com/services-support/maintenance-and-support.
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Abbreviations and Terminology
Each abbreviation, unless widely used, is spelled out in full when first used.
Related Documentation
Document Name
445HD IP Phone User's Manual – Teams Compatible
450HD IP Phone User's Manual – Teams Compatible
C450HD IP Phone User's Manual – Teams Compatible
RX50 Conference Phone User's Manual – Teams Compatible
400HD Series IP Phone Administrator's Manual – Teams Compatible
445HD IP Phone Quick Guide – Teams Compatible
450HD IP Phone Quick Guide – Teams Compatible
C450HD IP Phone Quick Guide – Teams Compatible
RX50 Conference Phone Getting Started Guide – Teams Compatible

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Document Revision Record
LTRT Description
11325 Initial document release
11327 Added Zoom
Documentation Feedback
AudioCodes continually strives to produce high quality documentation. If you have any
comments (suggestions or errors) regarding this document, please fill out the Documentation
Feedback form on our Web site at https://online.audiocodes.com/documentation-feedback.

Device Duo Application Note 1. Introduction
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1 Introduction
The Device Duo mode feature enables AudioCodes’ IP phones to be configured as a paired
audio device. The feature allows users to use their phone not only as a desk phone but also
as a loudspeaker over a network that supports telephony operations such as accept / end
calls, in addition to supporting basic audio operations.
Note:
•The Device Duo feature is currently supported for pairing AudioCodes’ phones with
Microsoft’s Teams application.
•The Device Duo feature is currently also supported for pairing AudioCodes' phones
with Zoom client application for basic functionalities.
•The feature is currently supported for Windows 10.
•The screens shown in these RNs are of the C450HD. The screens of the RX50,
450HD and 445HD are similar with insignificant differences. They’re not shown here
unless differences are significant.
•The screen of the C450HD is a touch screen, so ‘touch’ in this document is
interchangeable with ‘press’.
1.1 Benefits
The Device Duo allows users to use their IP phone not only as a phone but rather as a ‘smart’
audio device that combines handset with loud speaker.
The ‘smart’ audio device allows telephony controls such as call start and call end in addition
to audio device controls such as volume up and down and mute but it is not limited to these
controls.
The feature is based by standard implementation on the generalized portion of BToE
capabilities to allow other third party desktop applications to use the device as a loud
speaker.
1.2 ‘Paired Device’ vs. BToE
BToE is a product of specific cooperation between the Skype for Business client and the IP
phone vendor as part of the 3PIP Program.
Most of the control protocol is proprietary.
AudioCodes leverages the control protocol to third party desktop applications.

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Device Duo Application Note 2. Installing the Device Duo on the PC
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2 Installing the Device Duo on the PC
AudioCodes’ Device Duo Wizard facilitates installation of the controller on your PC. Before
installing the Device Duo, uninstall BToE if it’s installed.
To install the Device Duo:
1. Run the executable file AudioCodes Device Duo.exe.
2. In the wizard that opens, click Next.

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3. Accept the terms and click Next.
4. Note the installation path and click Next.

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5. Click Install or click Back to review or change settings – or Cancel to exist the Wizard.
6. Wait for the installation process to complete.
7. Click Finish; the installation is complete.

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Device Duo Application Note 3. Pairing the Phone with a Desktop Application
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3 Pairing the Phone with a Desktop
Application
This section shows how to pair the phone with the Microsoft Teams application. After the
Device Duo is installed on the PC, two options can be used to pair the phone as a paired
audio device:
Automatic pairing
Manual pairing
To automatically pair the phone (the default state of the phone):
Connect a PC port cable directly from the phone to the PC as shown in the figure
below.
Note:
•Both the LAN and the PC port must be connected.
•The phone’s configuration file parameter ‘lync/BToE/pairing_mode’ is by default set to
AUTOMATIC for pairing with a cable to the PC port.
•The configuration file parameter ‘lync/BToE/pairing_mode’ can be configured to BOTH (for
manual pairing mode).
•The default value for the RX50 is BOTH (only manual pairing is supported).
To manually pair the phone:
a. Use a pairing code generated by the phone as a unique ID of the device:
(i) Press the MENU key on the phone.

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(ii) In the Menu screen, touch Pairing.
(iii) Make a note of the pairing code, in this example, k4a*2WKU
(iv) On the PC, open the Device Duo:
(v) In the systray, click the AC Device Duo icon.
(vi) Select Manual Pairing Code…

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(vii) In the ‘Pair code’ field, enter the pairing code k4a*2WKU you noted earlier
and click OK; view on the phone the briefly displayed message Pairing
activated; the AC Device Duo icon is now highlighted and indicates AC
Device Duo is now connected to <Phone IP Address>.
Note: If the RX50 is signed in with a Skype for Business user, the Menu softkey will be
displayed and pairing will be available as explained above. If the RX50 Skype for Business user
is signed out and ‘voip/account/primary_type’ OR ‘voip/account/secondary_type’ is
TEAMS_DESKTOP, then a Pair softkey will be displayed for pairing. Since the RX50 default
value is TEAMS_DESKTOP, the Pair softkey is displayed when signed out.

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3.1 Viewing Account Status
The phone allows you to view the status of your accounts and paired applications.
To view the status of your accounts and paired applications:
Open the Accounts screen (MENU > Settings > Accounts).
3.2 Selecting the Application with which to Pair the
Phone
You can select the application with which to pair the phone.
To select the application to pair the phone with:
1. From the systray, right-click the Device Duo icon and select Paired Applications.
2. Select the application with which to pair the phone.

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Note:
•To define which account will be the default, the network administrator can configure the
phone’s configuration file parameters
•‘voip/account/primary_type’
√Value: {accounts type}
√Default:
- Skype for Business:SFB
- Generic SIP:SIP
•‘voip/account/secondary_type’.
√Value: {accounts type}
√Default:
- Skype for Business: EMPTY [RX50 Skype for Business is TEAMS_DESKTOP]
- Generic SIP: EMPTY
•The Device Duo feature supports:
√Device lock sync between the PC application and the phone [applicable only if the
Skype for Business account is also signed in; if the PC is not locked, the device will also
be unlocked]
√Hot Desking (performed by the guest user); only after a Skype for Business user is
defined; if the phone is paired and the user performs Hot Desking, the device will
automatically be unpaired and the guest user can pair themselves later.

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3.3 Verifying Desktop App Settings
Device Duo can be paired with a PC desktop application of your choice:
Microsoft Teams app (see below)
Zoom app (see here)
3.3.1 Teams App Settings
After pairing, make sure in your PC Teams application under ‘Settings’ that ‘Audio Devices’
is set to AudioCodes 400HD Phone as shown in the figures below.
Note: If these settings aren’t set to AudioCodes 400HD Phone, the phone will not function as
a speaker.

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3.3.2 Zoom App Settings
After pairing, make sure in your PC Zoom application under ‘Settings’ that ‘Audio Devices’ is
set to AudioCodes 400HD Phone as shown in the figures below.
The Device Duo application is currently supported for pairing AudioCodes' phones with Zoom
client application (basic functionalities).
Note: Two mandatory configuration file parameters must be configured for the Zoom application
to function with Device Duo:
•‘lync/BToE/pid’ must be configured to 33060
•‘lync/BToE/vid’ must be configured to 3595
The network administrator must log in as Admin to set the parameters.

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Note: If these settings aren’t set to AudioCodes 400HD Phone, the phone will not function as
a speaker.