AudioCodes C435HD Bedienungsanleitung

User's and Administrator's Manual

AudioCodes 400HD IP Phone Series

C435HD IP Phones

Microsoft Teams Application

Version 1.12



Notice C435HD Users & Administrator's Manual

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: July-13-2021

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  website  at 

https://www.audiocodes.com/services-support/maintenance-and-support.

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websiteathttps://online.audiocodes.com/documentation-feedback.

Stay in the Loop with AudioCodes

Related Documentation

Document Name

https://docs.microsoft.com/en-us/MicrosoftTeams/phones-for-teams

C435HDIPPhoneforMicrosoftTeamsQuickGuide

C435HDIPPhoneforMicrosoftTeamsReleaseNotes



- ii -

Content C435HD Users & Administrator's Manual

Table of Contents

1 Overview 1

Specifications 1

Allowing URLs, Ports (Security) 3

Security Guidelines for Android-based Native Teams Devices 4

Android-Level Security Hardening 5

Google Play Services 5

Running Android in Kiosk Mode 6

Screen Lock 6

AudioCodes Private Key 6

Android Debug Bridge (ADB) 6

App Signing 6

Web Browser 6

Remote Configuration Management 7

AudioCodes Device Manager Validation 7

Sandboxing 7

Device File System 7

Keystore 7

Device Certificate 8

Data Protection 8

Debugging Interface 8

Android Security Updates 8

AudioCodes Root CA Certificate 8

2 Setting up the Phone 11

Unpacking 11

Device Description 12

Front View 12

Rear View 15

Cabling 16

Mounting the Phone 16

Before Using AudioCodes Devices 16

3 Starting up 17

Configuring Device Settings 17

Restoring the Phone to Default Settings 29

Performing a Hard Restore 29

Performing a Soft Restore 30

Recovery Mode 31

Locking and Unlocking the Phone 31

Automatic Lock 31

Unlock 31

4 Teams Application 33

Signing In 33

- iii -

Content C435HD Users & Administrator's Manual

Multi-Cloud Sign-in 37

Remote Provisioning and Sign-in from Teams Admin Center 38

Getting Acquainted with the Phone Screen 42

Setting Status 43

Configuring Teams Application Settings 44

Using the People Screen 47

Accessing Voicemail 48

Using Audio Devices 49

Transferring Calls and Meetings across Devices 49

Signing Out 49

5 Performing Teams Call Operations 51

Making a Call 51

Dialing a Missed Call 53

Select to Dial 53

Making an Emergency Call 53

Answering Calls 54

Ending an Established Call 54

Managing Calls 54

Transferring a Call to Frequent Contacts 54

Transferring a Call to Work Voicemail 55

Viewing and Playing Voicemail Messages 55

Rejecting an Incoming Call, Sending it Directly to Voicemail 55

Adjusting Volume 55

Adjusting Ring Volume 56

Adjusting Tones Volume 56

Adjusting Handset Volume 56

Adjusting Speaker Volume 56

Adjusting Headset Volume 57

6 Performing Administrator-Related Operations 58

Updating Phone Firmware Manually 58

Downloading 802.1x Certificates 60

AudioCodes Teams IP Phone Utility 60

Manually Performing Recovery Operations 61

Removing Devices from Intune Management 62

Updating Microsoft Teams Devices Remotely 69

Managing Phones with the Device Manager 70

Configuring a Periodic Provisioning Cycle 71

Configuring TimeZone and Daylight Savings 71

Managing Devices with HTTPS 72

Supported Parameters 72

7 Troubleshooting 75

Users 75

- iv -

Content C435HD Users & Administrator's Manual

Network Administrators 75

Teams IP Phone Utility 75

Capturing the Phone Screen 77

Running Tcpdump 79

Getting Information about Phones 80

Remote Logging (Syslog) 82

Getting Diagnostics 83

Getting a Bug Report 86

Activating DSP Recording 87

Deactivating DSP Recording 88

SSH 89

Getting the Phone IP Address 89

Installing the Teams APK (or Any Other APK) using SSH 89

Microsoft Admin Center 90

Collecting Logs 90

Getting Company Portal Logs 92

Getting Logs via the Phone 92

Getting Logs using UUID 93

Getting Audio Debug Recording Logs 95

Collecting Media Logs (*.blog) from the Phone 96

- v -

CHAPTER1 Overview C435HD Users & Administrator's Manual

1 Overview

The AudioCodes  C435HD IPphones  areMicrosoft Teams-native entry  level/common  area 

phonesdesignedtosupportthenextgenerationofenterprisecollaborationtechnologieswith

alargecolorLCDscreenandfullUCintegrationfortheNativeMicrosoftTeamsOnlinemarket.

ThephonescanbemanagedbytheMicrosoftTeams&SkypeforBusinessAdminCenter.For

moreinformation,seehere.

Featurehighlights:

■NativesupportforMicrosoftTeams

■Colorscreen4.3":Graphic,480x272resolution,withmulti-lingualsupport

■Multi-lingualsupport

■Fullduplexspeakerphoneandheadsetconnectivity

■DualGbEsupport

■USBheadsetsupport

■PoEorexternalpowersupply

■Calendarandclick-to-joinsupport(Roadmap)

Specifications

ThefollowingtablesummarizesthesoftwarespecificationsoftheAudioCodesIPphonesfor

MicrosoftTeams.

Table 1-1: Software Specifications

Feature Details

Media

Processing

■VoiceCoders:G.711,G.729,G.722,SILKOpus

■AcousticEchoCancelation:G.168-2004compliant,64-msectail

length

■AdaptiveJitterBuffer

■VoiceActivityDetection

■ComfortNoiseGeneration

■PacketLostConcealment

■RTP/RTCPPacketization(RFC3550,RFC3551),SRTP(RFC3711)

Microsoft

Teamsphones

featureset

■Authentication(Signinwithusercredentials;Signinusing

PC/Smartphone;ModernAuthentication;Phonelock/unlock)

■Calling(Incoming/OutgoingP2Pcalls;In-callcontrolsviaUI(Mute,

- 1 -

CHAPTER1 Overview C435HD Users & Administrator's Manual

Feature Details

hold/resume,transfer,endcall);PSTNcalls;VisualVoicemail;911

support

■CalendarandPresence(roadmapfeature)(CalendarAccessand

MeetingDetails;PresenceIntegration;ExchangeCalendar

Integration;ContactPictureIntegration;CorporateDirectory

Access)

■Meetings(roadmapfeature)(One-clickJoinforMeetings;Join

SkypeforBusinessmeetings;MeetingCallcontrols[Mute/unmute,

hold/resume,hangup,add/removeparticipant];MeetingDetails.

Seealsohere.

Configuration

and

Management

■MicrosoftTeams&SkypeforBusinessAdminCenter(Provisioning

andLogging)

■AudioCodesDeviceManagementandAudioCodesRedirectServer

formonitoring,upgradingandconfiguring

Debugging

Tools

■AudioCodes'TeamsIPPhoneUtility(seeTeamsIPPhoneUtilityon

page75)

■LoguploadtoMicrosoftserver(certificationfor3rdpartySkypefor

Businessclients)

■RemoteloggingviaSyslog

■SSHAccess

■Capturingthephonescreen

■TCPdump

■CompanyPortal(Intune)logs

■AudioDebugrecordinglogs

■Medialogs(*.blog)

■Portmirroringnetworkmonitoring(C450HD)

■RemotePacketCapturenetworksnifferapplication

Localization

Support

■Multi-lingualsupport;thelanguagepacklistisnotyetfinalandis

subjecttomodification.

Hardware ■Graphic4.3"colorscreen,480x272resolution,withmulti-lingual

support

■Wiredconnectivity:

✔TwoRJ-45[GigabitEthernet(GbE)](10/100/1000BaseT

- 2 -

CHAPTER1 Overview C435HD Users & Administrator's Manual

Feature Details

Ethernet)ports:LANandPCport

✔RJ-9port(jack)forheadset

✔1xUSBportforheadsetsupport

✔RJ-11interface

■Power:

✔DCjackadapter12V

✔PowersupplyAC100~240V

✔PoEClass3:IEEE802.3af(optional)

■Keys:

✔VOICEMAILmessagehotkey(includingLED)

✔4-waynavigationbuttonwithOKkey

✔MENU

✔HOLD

✔MUTE(includingLED)

✔TRANSFER

✔VOLUMEcontrolkey

✔HEADSET(includingLED)

✔SPEAKER(includingLED)

✔BACK

✔CONTACTS

✔Teamshomekey

Allowing URLs, Ports (Security)

ThissectionguidesnetworkadministratorswhichURLs/PortstoallowwhendeployingTeams

phones(security).

Fromthedevicepointofview,thefollowingtablesummariestheportsthephoneuses.See

alsoMicrosoft'sguidetotheportsthephoneuses.

Table 1-2: URLs / Ports to Allow when Deploying Teams Phones (Security)

Server Role Service Name Port Protocol Notes

DNSServer All 53 DNS -

- 3 -

CHAPTER1 Overview C435HD Users & Administrator's Manual

Server Role Service Name Port Protocol Notes

AudioCodes

Device

Manager

AudioCodes

443 HTTPS AudioCodesdevice

managementserver

AudioCodes

Redirect

service

AudioCodes

443 HTTPS AudioCodesredirectservice

redirect.audiocodes.com

NTP

timeserver

AndroidNTP 123 UDP -

TimeZone

Database

TimeZones 443 HTTPS TimeZoneDatabase(often

calledtzorzoneinfo)

Microsoft

AppsArtifacts

server

Package

manager

- - Microsoftwillberequested

fortheprotocolandportand

FQDN.TheseURLsare

providedbytheAdmin

agent.

Security Guidelines for Android-based Native Teams Devices

AudioCodes'Android-basedNativeTeamsdevicesarepurpose-builtandcustomizedfor

MicrosoftTeamscallingandmeeting.CustomersmightperceiveAndroid-basedproductsas

vulnerabletosecurityissuesbutsecurityislessofanissueondevicespurpose-builtandcus-

tomizedforMicrosoftTeamscallingandmeeting.Securityisinfactenhancedonthesedevices

as part of their default use.

Whenanalyzingdevicesecurity,twolevelsmustbeaddressed:

■AuthenticationandsecuritywithrespecttoTeamsconnectivityanduse

■Androidlevel/systemofthedevice

AudioCodesrecommendsthefollowing:

■Usethesign-inmodeSign-in with other device option.Inthismode,usersdonottype

thepasswordonthedevicebutinsteadobtainacodeontheirPC/laptoptobeusedto

sign-in;thephoneobtainsaprivatetokenthatenablesittoaccessTeamscloud;this

token,unlikeapassword,allowsonlythatdevicewhichobtainedittoreuseit.Thetoken

isstoredonthesecuredfilesystem.

■LeverageMulti-Factor-authentication(MFA)toimprovesign-insecurity.

■Reducetheexpirationtimeofthesign-infordeviceswhichareconnectedremotely

(outsidetheorganization'snetwork)versusdevicesinsidetheorganization'spremises.

- 4 -

CHAPTER1 Overview C435HD Users & Administrator's Manual

AudioCodesrecommendsvisitingMicrosoft'stechnicalpagesformoresecurityguidelinesand

policiesforMicrosoftTeamsadoption:

■Overviewofsecurityandcompliance-MicrosoftTeams|MicrosoftDocs

■IdentitymodelsandauthenticationforMicrosoftTeams-MicrosoftTeams|Microsoft

Docs

■SignintoMicrosoftTeams-MicrosoftTeams|MicrosoftDocs

Android-Level Security Hardening

MajorAndroid-levelsystem-leveldevelopments have been incorporated into AudioCodes'

NativeTeamsdevicestoimprovesecurity:

■SeeGooglePlayServicesbelow

■SeeRunningAndroidinKioskModeonthenextpage

■SeeScreenLockonthenextpage

■SeeAudioCodesPrivateKeyonthenextpage

■SeeAndroidDebugBridge(ADB)onthenextpage

■SeeAppSigningonthenextpage

■SeeWebBrowseronthenextpage

■SeeRemoteConfigurationManagementonpage7

■SeeAudioCodesDeviceManagerValidationonpage7

■SeeSandboxingonpage7

■SeeDeviceFileSystemonpage7

■SeeKeystoreonpage7

■SeeDeviceCertificateonpage8

■SeeDataProtectiononpage8

■SeeDebuggingInterfaceonpage8

■SeeAndroidSecurityUpdatesonpage8

Google Play Services

GogglePlayserviceswereremovedfromtheAudioCodesNativeTeamsdevicesoftware.Access

toanyGooglestoreorPlayserviceisnotallowed.

■UpdatingtheAudioCodesNativeTeamsdevice'sAndroidsoftwareandapplicationis

performedviaspecialsoftwarecomponentsthateitherconnecttotheTeamsAdmin

CenterortoAudioCodes'DeviceManageroverasecuredchannel.

- 5 -

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