AudioCodes 400HD Series Bedienungsanleitung

User's and Administrator's Manual

AudioCodes 400HD IP Phone Series

C448HD | C450HD IP

Phones

Microsoft Teams Application

Version 1.10



Notice C448HD and C450HD | 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

C450HDandC448HDIPPhoneforMicrosoftTeamsQuickGuide

C450HDandC448HDIPPhoneforMicrosoftTeamsReleaseNotes

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



- ii -

Content C448HD and C450HD | Users & Administrator's Manual

Table of Contents

1 Overview 1

Specifications 1

Allowing URLs, Ports (Security) 4

Security Guidelines for Android-based Native Teams Devices 5

Android-Level Security Hardening 6

Google Play Services 6

Running Android in Kiosk Mode 6

Screen Lock 7

AudioCodes Private Key 7

Android Debug Bridge (ADB) 7

App Signing 7

Web Browser 7

Remote Configuration Management 7

AudioCodes Device Manager Validation 8

Sandboxing 8

Device File System 8

Keystore 8

Device Certificate 8

Data Protection 8

Debugging Interface 8

Android Security Updates 9

AudioCodes Root CA Certificate 9

2 Setting up the Phone 12

Unpacking 12

Device Description 13

Front View 13

Rear View 16

Cabling 17

Mounting the Phone 17

Desktop Mounting 17

Wall Mounting 17

Before Using AudioCodes Devices 18

3 Starting up 20

Configuring Device Settings 20

Configuring Wi-Fi 33

Restoring the Phone to Default Settings 35

Performing a Hard Restore 35

Performing a Soft Restore 36

Recovery Mode 36

Locking and Unlocking the Phone 36

Automatic Lock 37

- iii -

Content C448HD and C450HD | Users & Administrator's Manual

Unlock 37

4 Teams Application 39

Signing In 39

Multi-Cloud Sign-in 43

Remote Provisioning and Sign-in from Teams Admin Center 44

Getting Acquainted with the Phone Screen 48

Enabling Google Talkback 50

Opting in or out of Call Queues 51

Setting Status 51

Hot Desking 52

Changing Presence Status 53

Configuring Teams Application Settings 54

Setting up a Meeting 57

Using the People Screen 58

Accessing Voicemail 58

Using Audio Devices 59

Transferring Calls and Meetings across Devices 60

Signing Out 60

5 Performing Teams Call Operations 62

Making a Call 62

Redialing 63

Dialing a Missed Call 63

Select to Dial 63

Making an Emergency Call 63

Answering Calls 65

Ending an Established Call 65

Managing Calls 65

Parking a Call 65

Managing Teams Meetings 66

Using Live Captions 68

Raising a Hand During a Meeting 69

Transferring a Call to Frequent Contacts 69

Transferring a Call to Work Voicemail 69

Viewing and Playing Voicemail Messages 69

Rejecting an Incoming Call, Sending it Directly to Voicemail 70

Adjusting Volume 70

Adjusting Ring Volume 70

Adjusting Tones Volume 71

Adjusting Handset Volume 71

Adjusting Speaker Volume 71

Adjusting Headset Volume 71

Viewing and Joining Meetings 71

Adding a Speed Dial 73

- iv -

Content C448HD and C450HD | Users & Administrator's Manual

6 Performing Administrator-Related Operations 75

Updating Phone Firmware Manually 75

Downloading 802.1x Certificates 77

AudioCodes Teams IP Phone Utility 77

Manually Performing Recovery Operations 78

Removing Devices from Intune Management 79

Updating Microsoft Teams Devices Remotely 86

Managing Phones with the Device Manager 87

Configuring a Periodic Provisioning Cycle 88

Configuring TimeZone and Daylight Savings 88

Managing Devices with HTTPS 89

Supported Parameters 89

7 Troubleshooting 92

Users 92

Network Administrators 92

Teams IP Phone Utility 92

Capturing the Phone Screen 94

Running Tcpdump 96

Getting Information about Phones 97

Remote Logging (Syslog) 99

Getting Diagnostics 100

Getting a Bug Report 103

Activating DSP Recording 104

Deactivating DSP Recording 105

SSH 106

Getting the Phone IP Address 106

Installing the Teams APK (or Any Other APK) using SSH 106

Microsoft Admin Center 107

Collecting Logs 107

Getting Company Portal Logs 109

Getting Logs via the Phone 109

Getting Logs using UUID 110

Getting Audio Debug Recording Logs 112

Collecting Media Logs (*.blog) from the Phone 113

Capturing Traffic Using 'rpcapd' 113

Port Mirroring Network Monitoring 114

- v -

CHAPTER1 Overview C448HD and C450HD | Users & Administrator's Manual

1 Overview

The  AudioCodes  C448HD  and  C450HD  IP  phones  are  native  Microsoft  Teams  high- end 

executivebusiness phones with a largecolortouch screen and fullUC integration  for the

NativeMicrosoftTeamsOnlinemarket.

TheMicrosoftTeamsC448HDandC450HDphonesareequippedwitha5-inchcolorcapacitive

touchscreenof1280x720resolution.

The C448HD phone is identical to the C450HD phone from the user's point of view,

with the exception of:

●The C448HD phone does not allow the 'Switch to Skype' feature (in the Admin

debugging tab); the C450HD allows this feature.

●The C448HD phone does not feature Bluetooth and Wi-Fi; the C450HD phone

features optional integrated Wi-Fi and Bluetooth support (contact your local

AudioCodes representative for more information about regional availability).

●The C448HD phone features one USB port; the C450HD phone features two.

●The C448HD phone does not feature an option to add the Expansion Module; the

C450HD phone features this option.

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

moreinformation,seehttps://docs.microsoft.com/en-us/MicrosoftTeams/phones-for-teams.

AudioCodes'  Device  Manager  and  AudioCodes'  Redirect  Server  are  also  supported  for 

monitoring,upgradingandconfiguringthedevices.

ThephonesfeaturetheoptiontobeusedasaMicrosoftTeamsCompatibleIPphone,offered

as part of AudioCodes’ Managed IPPhones solution which defines theIPphoneas an IT-

managedentityanddeliversuniqueandcompletelifecyclemanagementofend-userdesktop

devices.

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

- 1 -

CHAPTER1 Overview C448HD and C450HD | Users & Administrator's Manual

Feature Details

■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,

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92)

■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

- 2 -

CHAPTER1 Overview C448HD and C450HD | Users & Administrator's Manual

Feature Details

Localization

Support

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

subjecttomodification.

Hardware ■Five-inchcolorcapacitivetouchscreen,1280x720resolution,with

anintuitiveuserinterface.

■Wiredconnectivity:

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

Ethernet)ports:LANandPCport

✔RJ-9port(jack)forheadset

✔[C450HD]2xUSBportsforheadsetsupport(1xUSBportcan

beusedatatime).

C450HDwithDBWsuffixflavor:

●White USB port–hostportwhichsupportsUSBheadsets

●Black USB port–configurabledevice/hostport(default

configuration–devicemode)forfutureuseasdeviceport.

Toconfiguredevice/hostport:

setup_usbport2_mode.sh host(fromdevicetohost)

setup_usbport2_mode.sh device(fromhosttodevice)

Itcanalternativelybeconfiguredbysettingtheconfiguration

fileparameter'management/usbport2/mode'tothevalueof

USB_HOST_MODE/USB_DEVICE_MODE

✔[C448HD]1xUSBportforheadsetsupport

✔RJ-11interface

■Wirelessconnectivity(C450HDonly):

✔Dualband2.4GHz/5GHz,802.11b/g/nWi-Fisupport

✔Wi-Fisupportedprotocols:WEP,WPA-PSK/WPA2-PSKand

WPA/WPA2Enterprise(802.1X)PEAPonly

■Bluetoothsupport(C450HDonly);integrated;optional

■ExpansionModule(C450HDonly;optional)

■Mounting:

✔Wallanddesktopmountingoptions

✔Oneanglefordesktopmount,anotherangleforwallmount

■Power:

✔DCjackadapter12V

- 3 -

CHAPTER1 Overview C448HD and C450HD | Users & Administrator's Manual

Feature Details

✔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

✔REDIAL

✔HOLD

✔MUTE(includingLED)

✔TRANSFER

✔VOLUMEcontrolkey

✔HEADSET(includingLED)

✔SPEAKER(includingLED)

✔BACK

✔CONTACTS

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 -

AudioCodes

Device

Manager

AudioCodes

443 HTTPS AudioCodesdevice

managementserver

AudioCodes

Redirect

service

AudioCodes

443 HTTPS AudioCodesredirectservice

redirect.audiocodes.com

- 4 -

CHAPTER1 Overview C448HD and C450HD | Users & Administrator's Manual

Server Role Service Name Port Protocol Notes

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.

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

- 5 -

Andere Handbücher für 400HD Series

Dieses Handbuch passt für folgende Modelle

Inhaltsverzeichnis

Andere AudioCodes IP-Telefon Handbücher

AudioCodes

AudioCodes C450HD Bedienungsanleitung

AudioCodes

AudioCodes 420HD Gebrauchs- und Pflegehandbuch

AudioCodes

AudioCodes C450HD Bedienungsanleitung

AudioCodes

AudioCodes C470HD Bedienungsanleitung

AudioCodes

AudioCodes 420HD Gebrauchs- und Pflegehandbuch

AudioCodes

AudioCodes 400HD Series Bedienungsanleitung

AudioCodes

AudioCodes 405HD Bedienungsanleitung

AudioCodes

AudioCodes 420HD Bedienungsanleitung

AudioCodes

AudioCodes 430HD Bedienungsanleitung

AudioCodes

AudioCodes 310HD Bedienungsanleitung

AudioCodes

AudioCodes Device Duo Montage- und Bedienungsanleitung

AudioCodes

AudioCodes 400HD Series Bedienungsanleitung

AudioCodes

AudioCodes C450HD Bedienungsanleitung

AudioCodes

AudioCodes C470HD Bedienungsanleitung

AudioCodes

AudioCodes C455HD Series Bedienungsanleitung

AudioCodes

AudioCodes 430HD Bedienungsanleitung

AudioCodes

AudioCodes Huddle Room Solution Bedienungsanleitung

AudioCodes

AudioCodes C470HD Bedienungsanleitung

AudioCodes

AudioCodes 320HD Gebrauchs- und Pflegehandbuch

AudioCodes

AudioCodes C450HD Anleitung zur Verwendung

AudioCodes

AudioCodes 310HD Gebrauchs- und Pflegehandbuch

AudioCodes

AudioCodes 440HD Bedienungsanleitung

AudioCodes

AudioCodes 420HD Bedienungsanleitung

AudioCodes

AudioCodes 400HD Series Bedienungsanleitung

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