AudioCodes 400HD Series User manual

User's and Administrator's Manual
AudioCodes 400HD IP Phone Series
C448HD | C450HD IP
Phones
Microsoft Teams Application
Version 1.3.51
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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: May-27-2020
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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.
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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 
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Related Documentation
Document Name
C450HDIPPhoneforMicrosoftTeamsQuickGuide
C450HDIPPhoneforMicrosoftTeamsReleaseNotes
https://docs.microsoft.com/en-us/MicrosoftTeams/phones-for-teams

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Content C448HD and C450HD | Users & Administrator's Manual
Table of Contents
1 Overview 1
Specifications 1
2 Setting up the Phone 5
Unpacking 5
Device Description 6
Front View 6
Rear View 9
Cabling 10
Mounting the Phone 11
Desktop Mounting 11
Routing the Handset Cable 12
Wall Mounting 12
3 Starting up 14
Configuring Device Settings 14
Restoring the Phone to Default Settings 32
Performing a Hard Restore 32
Performing a Soft Restore 32
Locking and Unlocking the Phone 33
Automatic Lock 34
Smart Unlock 34
4 Teams Application 36
Signing In 36
Getting Acquainted with the Phone Screen 38
Changing Presence Status 40
Configuring Teams Application Settings 42
Setting up a Meeting 45
Accessing Voicemail 46
Using Audio Devices 47
Signing Out 47
5 Performing Basic Operations 49
Making a Call 49
Redialing 51
Dialing a Missed Call 51
Making an Emergency Call 51
Answering Calls 52
Ending an Established Call 54
Managing Calls 54
Parking a Call 56
Initiating a Teams Meeting 56
Viewing and Playing Voicemail Messages 58
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Content C448HD and C450HD | Users & Administrator's Manual
Rejecting an Incoming Call, Sending it Directly to Voicemail 60
Adjusting Volume 60
Adjusting Ring Volume 60
Adjusting Tones Volume 60
Adjusting Handset Volume 61
Adjusting Speaker Volume 61
Adjusting Headset Volume 61
Managing Meetings 62
Better Together over Bluetooth 63
6 Updating C450HD Phone Firmware Manually 65
7 Troubleshooting 66
Users 66
Network Administrators 66
Collecting Logs 66
Remote Logging 68
Diagnostic Data 69
SSH 71
Capturing the Phone Screen 71
Running the tcpdump Tool 72
Activating DSP Recording 72
Deactivating DSP Recording 72
Getting the Phone IP Address 73
Getting Information about Phones 73
Installing the Teams APK (or Any Other APK) using SSH 74
Getting Company Portal Logs 74
Getting Audio Debug Recording Logs 76
Collecting Media Logs (*.blog) from the Phone 76
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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.
ThephonesfeaturetheoptiontobeusedasaMicrosoftSkypeforBusiness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.Asingle-clickswitchoverbetweenMicrosoftTeamswithnativeclientexperienceand
SkypeforBusinessissupported.
Specifications
The following tablesummarizes  the software specifications  ofthe C448HD and  C450HD IP
PhonesforMicrosoftTeams.
Table 1-1: C448HD and C450HD IP Phones for Microsoft Teams 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
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CHAPTER1 Overview C448HD and C450HD | Users & Administrator's Manual
Feature Details
■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(CalendarAccessandMeetingDetails;
PresenceIntegration;ExchangeCalendarIntegration;ContactPicture
Integration;CorporateDirectoryAccess)
■Meetings(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
https://docs.microsoft.com/en-us/MicrosoftTeams/phones-for-
teams.
Configuration
/
Management
■MicrosoftTeams&SkypeforBusinessAdminCenter(Provisioning
andLogging)
Debugging
Tools
■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)
Localization
Support
■Multi-lingualsupport;thelanguagepacklistisnotyetfinalandis
subjecttomodification.
C448HDand
C450HD
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forWANandLAN
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CHAPTER1 Overview C448HD and C450HD | Users & Administrator's Manual
Feature Details
✔RJ-9port(jack)forheadset
✔RJ-9port(jack)forhandset
✔2xUSBportsforheadsetsupport(C450HD);1xUSBportfor
headsetsupport(C448HD)
✔RJ-11interface
■Wirelessconnectivity(C450HDonly):
✔Singleband2.4GHz,802.11b/g/nWi-Fisupport
✔Wi-Fisupportedprotocols:WEP,WPA-PSK/WPA2-PSKand
WPA/WPA2Enterprise(802.1X)PEAPonly
■IntegratedoptionalBluetoothsupport(C450HDonly)(Currently
supportedataBetalevel)
■ExpansionModule(C450HDonly)
■Mounting:
✔Wallanddesktopmountingoptions
✔Oneanglefordesktopmount,anotherangleforwallmount
■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
✔REDIAL
✔HOLD
✔MUTE(includingLED)
✔TRANSFER
✔VOLUMEcontrolkey
✔HEADSET(includingLED)
✔SPEAKER(includingLED)
✔BACK(the‘x’key)
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CHAPTER1 Overview C448HD and C450HD | Users & Administrator's Manual
Feature Details
✔CONTACTS(notyetsupportedinTeams)
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CHAPTER2 Setting up the Phone C448HD and C450HD | Users & Administrator's Manual
2 Setting up the Phone
Unpacking
Whenunpacking,makesurethefollowingitemsarepresentandundamaged:
Phone / Stand Handset / Cord

Cat 5e Ethernet Cable AC Power Adapter (Optional)
If  anything  appears  to  be  missing  or  broken,  contact  the  distributor  from  whom  you 
purchasedthephoneforassistance.
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CHAPTER2 Setting up the Phone C448HD and C450HD | Users & Administrator's Manual
Device Description
Usethenextgraphicstoidentifyandfamiliarizeyourselfwiththedevice'shardwarefunctions.
Front View
Thefrontviewofthephoneisshowninthefigureanddescribedinthetable.
Figure 2-1: Front View
Table 2-1: Font View Description
Item # Label/Name Description
1RingLED Indicatesphonestatus:
■Green:Idlestate
■Flashingblue:Incomingcall(ringing)
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CHAPTER2 Setting up the Phone C448HD and C450HD | Users & Administrator's Manual
Item # Label/Name Description
■Red:Answeredcall
2TFTtouch
screen
ThinFilmTransistortouchscreen,atypeofLCD(Liquid
CrystalDisplay)interactivescreenwhichdisplayscalling
informationandletsyouconfigurephonefeaturesby
touchingtheglass.
3Navigation
Control/OK
■Pressthebutton'supperrimtoscrollupmenus/itemsin
thetouchscreen.
■Pressthebutton'slowerrimtoscrolldown.
■Pressthebutton'sleftorrightrimtomovethecursorleft
orright(wheneditingacontactnumberforexample).
■PressOKtoselectamenu/item/option.
4Voicemail Retrievesvoicemailmessages.
5CONTACTS [Functionalitypending]
6MENU AccessestheSettingsscreen.
7REDIAL Accessesalistofrecentlydialednumbers;onecanbe
selectedtoredial.
8Kensingtonlock Allowslockingthedevice.
9TRANSFER Transfersacall.
10 HOLD Placesanactivecallonhold.
11 Alphanumerical
Keypad
Keysforenteringnumbers,alphabeticallettersandsymbols
(e.g.,colons)
12 Microphone Allowstalkingandlistening.Thenetworkadministratorcan
disableitifrequired.
13 SPEAKER Activatesthespeaker,allowingahands-freeconversation.
14 HEADSET Activatesacallusinganexternalheadset.
15 MUTE Mutesacall.
1617 ▲VOL Increasesordecreasesthevolumeofthehandset,headset,
speaker,ringtoneandcallprogresstones.
▼VOL
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CHAPTER2 Setting up the Phone C448HD and C450HD | Users & Administrator's Manual
Item # Label/Name Description
18 x Usedasa‘Back’keytoreturntothepreviousscreen.
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CHAPTER2 Setting up the Phone C448HD and C450HD | Users & Administrator's Manual
Rear View
Therearviewofthephoneisshowninthefigureanddescribedinthetable.
Figure 2-2: Rear View
Table 2-2: Rear View Description
# Label Description
1 Handsetjack,i.e.,portRJ-9,toconnectthehandset.
2 RJ-45porttoconnecttotheEthernetLANcablefortheLANconnection(uplink
-10/100/1000Mbps).Ifyou'reusingPoweroverEthernet(PoE),powertothe
phoneissuppliedfromtheEthernetcable(drawspowerfromeitheraspare
lineorasignalline).
3 RJ-45porttoconnectthephonetoaPC(10/100/1000Mbpsdownlink).
4 12VDCpowerjackthatconnectstotheACpoweradapter.
5 Headsetjack,i.e.,RJ-9portthatconnectstoanexternalheadset.
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CHAPTER2 Setting up the Phone C448HD and C450HD | Users & Administrator's Manual
Cabling
Thedocumentationfollowingshowshowto cableyourphone.Usethefigureand tableas
reference.
Figure 2-3: Cabling the Phone
Table 2-3: Cabling the Phone
Action Description
1 Connectthephone'sRJ-9porttothehandsetcord'slonger,straightend.
Connectthehandsettothehandsetcord'sshort,straightend.
2 ConnectoneofthetwoUSBportstoaheadset[optional].
3 Connectthephone’spowersocketlabelledDC12VtotheconnectortipoftheAC
poweradapter.Connectthetwo-prongACadapterdirectlytotheelectricalwall
outlet.
Whenthephonepowersup,alltheLEDsmomentarilylightup.
4 Connectthephone'sRJ-9headsetjacktoaheadset[optional]
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CHAPTER2 Setting up the Phone C448HD and C450HD | Users & Administrator's Manual
Action Description
5 ConnecttheRJ-45PCporttoacomputer/laptop,usingaCAT5/5estraight-
throughEthernetcable
6 Connectthephone'sRJ-45LANporttoyourLANnetwork(LANportorLAN
switch/router)usingaCAT5/5eEthernetcable.
7 Internaluseonly.FAEsusetheporttodebugandtroubleshootthephone-after
connectingtheAUX(auxiliary)porttoaterminalmonitorwithaserialcable.
If the LAN to which the phone is connected supports Power over Ethernet (PoE), no AC
adapter is required; the phone receives power from the Ethernet network.
Prior to connecting power, refer to the Compliancy and Regulatory Information at
www.audiocodes.com/library.
Mounting the Phone
Thephonecanbemountedona:
■Desk(seeDesktopMountingbelow)
■Wall(seeWallMountingonthenextpage)
Seealsohttps://www.youtube.com/watch?v=oGe9STB9lFEtoassemblethebasestand.
Desktop Mounting
Thedocumentationfollowingshowshowtomountthephoneonaflatsurfacelikeadesk.
➢To mount the phone on a flat surface like a desk:
1. Off-hookthehandset(ifon-hook)andplacethephoneupsidedown,i.e.,base-up,on
yourdesktop.
2. Onthephone'sstand,identifyouternotches.
3. Onthephone'sbase,identifyouterrails.
4. Invertthestandandalignitsouternotcheswiththebase'souterrails.
5. Insertthestand'souternotchesintothebase'souterrailsandslidethenotchesalongthe
railsuntilthestandclick-locksintothebase.
6. Revertthephoneandstanditonthedesktop.
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CHAPTER2 Setting up the Phone C448HD and C450HD | Users & Administrator's Manual

Routing the Handset Cable
Thephonefeaturesagrooveforroutingthehandsetcable.
Wall Mounting
Thedocumentationfollowingshowshowtomountthephoneonawall.
➢To mount the phone on a wall:
1. Attachthestandofthephoneforthepurposeofawallmounting:
a. Detachthebase.
b. Attachitagainasyoudidforadesktopmounting(seeDesktopMountingonthe
previouspage)onlynowmakesurethatit'sflatlyalignedtolieflushagainstthewall,
i.e.,slidetheinnerrailsofthephonestandontothephonebase'sinnernotches.
2. ConnecttheACpoweradapter,LANandPC/laptopcords.
3. Inthewall,drilltwohorizontalholesatadistanceof315/16inches(100mm)fromone
another,inlinewiththetemplate.
4. Inserttwomasonryanchorsintotheholesifnecessary.
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CHAPTER2 Setting up the Phone C448HD and C450HD | Users & Administrator's Manual
5. Threadtwoscrews(notsupplied)intothetwomasonaryanchors;ensurethattheheads
extendsufficiently(about3/16inchor5mmfromthewall)forthephonestand'skeyhole
slotstohangon.
6. Hangthephonestand'skeyholeslotsonthesescrews.
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CHAPTER3 Starting up C448HD and C450HD | Users & Administrator's Manual
3 Starting up
Afterconnectingthephonetothenetwork(orresettingit),astart-upwizardopensdisplaying
bydefaultthe‘Selectthelanguageforyourdevice’screen.
Configurethelanguageofyourchoiceandthenconfiguredevicesettingsto match specific
requirements.Onlyifthephoneisrestoredtodefaultsettingswillitbenecessarytorepeat
this.
Configuring Device Settings
Thesection familiarizes you with thedevice’s settings. Devices aredelivered to customers 
configured  with  their  default  settings.  Customers  can  customize  these  settings  to  suit 
enterpriserequirements.
➢To access device settings:
1. Inthephone’sidlescreen,touchthe menu,touchSettingsandthenDeviceSettings.
Alternatively,pressthehardMENUkeyonthephone.
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CHAPTER3 Starting up C448HD and C450HD | Users & Administrator's Manual
2. Swipedowntonavigatetoandopenasetting.Usethistableasreference.
Table 3-1: Device Functions Settings Descriptions
Setting Description
Login to the Device as Regular User
Display Opensthe‘Display’screen[Brightnesslevel].
Thephone'sscreensupportsdifferentbrightnesslevels.Customerscan
choosethelevelthatbestsuitsrequirements.
■Sleep
■Screensaver
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CHAPTER3 Starting up C448HD and C450HD | Users & Administrator's Manual
Setting Description
■Font size
Sound Allowsyoutocustomizephonevolumetocreateafriendlieruser
experience.
Ring volume at n%
Date&time DateandtimeareautomaticallyretrievedfromthedeployedNetwork
TimeProtocol(NTP)server.
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