AudioCodes 400HD Series User manual

User's and Administrator's Manual
AudioCodes 400HD IP Phone Series
C448HD | C450HD IP
Phones
Microsoft Teams Application
Version 1.10
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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: April-07-2021
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

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Content C448HD and C450HD | Users & Administrator's Manual
Table of Contents
1 Overview 1
Specifications 1
Security Guidelines for Android-based Native Teams Devices 4
Android-Level Security Hardening 5
Google Play Services 5
Running Android in Kiosk Mode 5
AudioCodes Private Key 6
Android Debug Bridge (ADB) 6
App Signing 6
Web Browser 6
Remote Configuration Management 6
AudioCodes Device Manager Validation 6
Device File System 7
Debugging Interface 7
Android Security Updates 7
AudioCodes Root CA Certificate 7
2 Setting up the Phone 10
Unpacking 10
Device Description 11
Front View 11
Rear View 14
Cabling 15
Mounting the Phone 15
Desktop Mounting 15
Wall Mounting 15
Before Using AudioCodes Devices 16
3 Starting up 18
Configuring Device Settings 18
Configuring Wi-Fi 31
Restoring the Phone to Default Settings 33
Performing a Hard Restore 33
Performing a Soft Restore 34
Recovery Mode 35
Locking and Unlocking the Phone 35
Automatic Lock 35
Unlock 35
4 Teams Application 37
Signing In 37
Multi-Cloud Sign-in 42
Remote Provisioning and Sign-in from Teams Admin Center 43
Getting Acquainted with the Phone Screen 46
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Content C448HD and C450HD | Users & Administrator's Manual
Enabling Google Talkback 48
Opting in or out of Call Queues 49
Setting a Status Message 49
Hot Desking 50
Changing Presence Status 51
Configuring Teams Application Settings 52
Setting up a Meeting 56
Using the People Screen 56
Accessing Voicemail 58
Using Audio Devices 59
Signing Out 59
5 Performing Basic Operations 61
Making a Call 61
Redialing 62
Dialing a Missed Call 62
Touch to Dial 62
Making an Emergency Call 62
Answering Calls 64
Ending an Established Call 65
Managing Calls 65
Parking a Call 66
Managing Teams Meetings 66
Using Live Captions 69
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 71
Adjusting Volume 71
Adjusting Ring Volume 71
Adjusting Tones Volume 71
Adjusting Handset Volume 72
Adjusting Speaker Volume 72
Adjusting Headset Volume 72
Viewing and Joining Meetings 73
Better Together over Bluetooth 74
Adding a Speed Dial 76
6 Updating Phone Firmware Manually 80
7 Managing Phones with the Device Manager 82
Configuring a Periodic Provisioning Cycle 83
Configuring TimeZone and Daylight Savings 83
Managing Devices with HTTPS 84
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Content C448HD and C450HD | Users & Administrator's Manual
Supported Parameters 84
8 Updating Microsoft Teams Devices Remotely 87
8 Removing Devices from Intune Management 88
9 Troubleshooting 95
Users 95
Network Administrators 95
Collecting Logs 95
Remote Logging 97
Diagnostic Data 98
SSH 100
Capturing the Phone Screen 100
Running the tcpdump Tool 101
Activating DSP Recording 101
Deactivating DSP Recording 101
Getting the Phone IP Address 102
Getting Information about Phones 102
Installing the Teams APK (or Any Other APK) using SSH 103
Getting Company Portal Logs 103
Getting Logs via the Phone 104
Getting Logs using UUID 105
Getting Audio Debug Recording Logs 107
Collecting Media Logs (*.blog) from the Phone 107
Capturing Traffic Using 'rpcapd' 107
Port Mirroring Network Monitoring 109
Manually Performing Recovery Operations 109
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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.
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
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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(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
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
■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.
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CHAPTER1 Overview C448HD and C450HD | Users & Administrator's Manual
Feature Details
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
✔RJ-9port(jack)forheadset
✔RJ-9port(jack)forhandset
✔[C450HD]2xUSBportsforheadsetsupport:USBwhiteport–
hostport;USBblackport–deviceport(default)butitcanbe
configuredtohostportusingthefollowingcommands:
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
■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)
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CHAPTER1 Overview C448HD and C450HD | Users & Administrator's Manual
Feature Details
✔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)
✔CONTACTS
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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
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CHAPTER1 Overview C448HD and C450HD | Users & Administrator's Manual
■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thedevicesto
improvesecurity:
■SeeGooglePlayServicesbelow
■SeeRunningAndroidinKioskModebelow
■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thenextpage
■SeeAudioCodesDeviceManagerValidationonthenextpage
■SeeDeviceFileSystemonpage7
■SeeDebuggingInterfaceonpage7
■SeeAndroidSecurityUpdatesonpage7
Google Play Services
GogglePlayserviceswereremovedfromdevicesoftware.AccesstoanyGooglestoreorPlay
serviceisnotallowed.
■Updatingthe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.
Running Android in Kiosk Mode
AndroidKioskLockdownsoftware'locksdown'Androiddevicestoonlyallowessentialappsby
disablingaccesstotheHome/ Launcher.UsingAndroidKiosk Lockdownsoftware,Android
devicescanbeconvertedintopublickioskterminalsorsecuredworkdevices.
■OnlyspecificMicrosoftappsandAudioCodes-signedappsthatwerecertifiedand
approvedinthecertificationprocesscanruninKioskmode;evenifamalicioususer
managestoinstallanewunauthorizedapponthefilesystem,thelauncheronthedevice
willonlyrunthosespecificapprovedappsandthiscannotbechangedinruntime(only
withanewsoftwarecodeprovidedbyAudioCodes).
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CHAPTER1 Overview C448HD and C450HD | Users & Administrator's Manual
AudioCodes Private Key
ThesystemsoftwareonthedeviceissignedwithAudioCodes'privatekey.Userscanreplace
thecompletesoftwareonlywithnewsoftwarethatisalsosignedbyAudioCodes'privatekey.
Thispreventsusersfromreplacingthecompleteover-the-air(OTA)packageofthedevicewith
anynewsystemsoftware,unlessthesoftwareisfullysignedbyAudioCodes.
Android Debug Bridge (ADB)
AudioCodesdisabledtheAndroidDebugBridge(ADB)applicationandkeepstheTeamsapp
runninginthefrontallthetime.Asaresult,it'simpossibletoinstallotherappsfromunknown
sources,andtosideloadapps.
App Signing
Androidrequiresthatallappsaredigitallysignedwithadeveloperkeybeforeinstallation;the
devicescurrentlyverifythatappsaresignedbyMicrosoft.
Web Browser
ThedevicedoesnotincludeaWebbrowser.Userscannotbrowsetothepublicinternetor
internal  intranet.  All Web  services  are  customized  to  connect  to  Office  365  services  and 
AudioCodes'managedservicessuchastheOneVoiceOperationsCenter(OVOC).
Remote Configuration Management
NativeTeamsdevicesdonothaveanembeddedWebserver.Configurationandmanagement
areperformedusingoneofthefollowingremoteinterfaces:
■MicrosoftTeamsAdminCenter(forNativeTeamsdevices)overHTTPSprotocols,enabled
afterasuccessfulsign-inauthenticationprocess.
■AudioCodesDeviceManager(partofAudioCodes'OVOCsuite)overHTTPS.
■DebugginginterfaceoverSSH.NotethatSSHmustbedisabledbydefaultandenabled
onlyperspecificcasefordebuggingpurposesonly.
AudioCodes Device Manager Validation
ThephonesvalidatetheAudioCodesDeviceManageridentityusingaknownRootCA:
■ThedeviceisshippedwithknownRootCAsinstalled.SeeAudioCodesRootCACertificate
onthenextpage.
■Fortheinitialconnection,theAudioCodesDeviceManageraccessesdevicesusinga
knownCA.
■Onceasuccessfulsecuredconnectionhasbeenestablishedbetweenthedeviceandthe
DeviceManager,theusercanreplacetheRootCAontheDeviceManagerandonthe
phone,andre-establishtheconnectionleveraginganyPrivateRootCA.
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CHAPTER1 Overview C448HD and C450HD | Users & Administrator's Manual
Device File System
The device's  file system  is  encrypted  on  the C470HD,  C435HD and  C450HD-DBW  devices. 
Customers  may enforce a policy  ofdevice encryption via Microsoft's  cloud-based  Intune 
service.
Debugging Interface
■ThedevicesleverageSSHasadebugginginterface.
■AudioCodesrecommendsthatcustomersdisableSSHondevicesviaAudioCodes'Device
Manager(OVOC).
■AudioCodesrecommendschangingtheAdminpasswordfromthedefault,viatheTeams
AdminCenterorAudioCodes'DeviceManager(OVOC).
■Whenadevice-ormultipledevices-needstobedebugged,userscanenableSSHonit/
them,accessSSHwiththenewAdminpasswordforthedebuggingphase,anddisableSSH
oncedebuggingisfinished.
Android Security Updates
AudioCodesregularlyadoptsandintegratesAndroidsecurityupdates.
Forreference,seehttps://source.android.com/security/bulletin/2019-10-01.
AudioCodes Root CA Certificate
ThefollowingfigureshowstheAudioCodesRootCACertificate.
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CHAPTER1 Overview C448HD and C450HD | Users & Administrator's Manual
-----BEGIN CERTIFICATE-----
MIIDMTCCAhmgAwIBAgIBATANBgkqhkiG9w0BAQsFADAfMQwwCgYDVQQK
EwNBQ0wx
DzANBgNVBAMTBlJvb3RDQTAeFw0wMDAxMDEwMDAwMDBaFw0zMDAxM
DEwMDAwMDBa
MB8xDDAKBgNVBAoTA0FDTDEPMA0GA1UEAxMGUm9vdENBMIIBIjANBgkq
hkiG9w0B
AQEFAAOCAQ8AMIIBCgKCAQEA6GK495KUCXAm/UE17G4/cjnZN4LNaxYE
YzbfZL0a
EhgSKYt/LQ+iUcDhojsneusNgrcGkpwKklKsGsvGWmSRNULV01CW+TX2VJN7
3+hh
V0uzhyOIYAUhbDaoqNM6Kp5b7sJ1ew4Ig9kfd/ma9Czl5koESLlw/inLj/r+rD96
- 8 -

CHAPTER1 Overview C448HD and C450HD | Users & Administrator's Manual
mUcPElWrKspv7Qy4I14fsK/yMArixRopTL1munVVPpSFM9Jh8IY3JHyr5CQJXK
Ks
EhGAJsnHaRqsR2Su3X/WtslgEF+cvP34pxhlhFL29nMfnaFATSS3rgGaFlSvl1ZS
esLMqkWjp9cqGYrvt7K61sYnvMMb+o/KbWqVokXb+Fr7bwIDAQABo3gwdjAMB
gNV
HRMEBTADAQH/MB0GA1UdDgQWBBQDXySn9hz15lDraZ+iXddZGReB+zBH
BgNVHSME
QDA+gBQDXySn9hz15lDraZ+iXddZGReB+6EjpCEwHzEMMAoGA1UEChMDQ
UNMMQ8w
DQYDVQQDEwZSb290Q0GCAQEwDQYJKoZIhvcNAQELBQADggEBAI0rUyw
ommWWJnH3
JOfKiS3+VnX5hJITZymvWanMXUz/6FonHccPXEBYTrUYwhiWx3dwELAFXDF
KkxMp
0KKWZ4F39cAOLRjqhzya+xUeeJ9HQZCXYAJ6XgvTfN2BtyZk9Ma8WG+H1hN
vvTZY
QLbWsjQdu4eFniEufeYDke1jQ6800LwMlFlc59hMQCeJTenRx4HdJbJV86k1gBU
E
A7fJT1ePrRnXNDRz6QtADWoX3OmN7Meqen/roTwvLpEP22nYwvB28dq3Jetl
QKwu
XC4gwI/o8K2wo3pySLU9Y/vanxXCr0/en5l3RDz1YpYWmQwHA8jJIu8rxdhr+VN
Q
Zv6R/Ys=
-----END CERTIFICATE----
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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 items listed in thephone's Quick Guidearepresent and 
undamaged.
If  anything  appears  to  be  missing  or  broken,  contact  the  distributor  from  whom  you 
purchasedthephoneforassistance.
Fordetailedinformation,seethephone'sQuick Guideshippedwiththedeviceoravailable
fromAudioCodes.
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CHAPTER2 Setting up the Phone C448HD and C450HD | Users & Administrator's Manual
Device Description
Use thefollowing  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red: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.
■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 AccessesthePeoplescreen.
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.
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CHAPTER2 Setting up the Phone C448HD and C450HD | Users & Administrator's Manual
Item # Label/Name Description
1617 ▲VOL Increasesordecreasesthevolumeofthehandset,
headset,speaker,ringtoneandcallprogresstones.
▼VOL
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
Seethephone'sQuick GuideshippedwiththedeviceandalsoavailablefromAudioCodesfor
detailedinformationonhowtocablethephone.
Mounting the Phone
Thephonecanbemountedona:
■Desk(seeDesktopMountingbelow)
■Wall(seeWallMountingbelow)
Seethephone'sQuick GuideshippedwiththedeviceandalsoavailablefromAudioCodesfor
detailedinformationonhowtomountthephone.
Seealso https://www.youtube.com/watch?v=oGe9STB9lFEforaclip demonstratinghowto
mountaphoneonadesktopandonawall.
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.

Wall Mounting
Thefollowingdocumentationshowshowtomountthephoneonawall.
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