AudioCodes C455HD Series User Manual

CHAPTER1 Overview
C455HD | Users & Administrator's Manual
Screen Lock
AudioCodes  Native  Teams  devices  use a  screen  lock mechanism  to prevent  any malicious 
user/users  from  gaining  access  to  Calendar  information  and  /  or  Active  Directory  list  of 
employeesand/ortriggeringunauthorizedTeamscallsfromthedevice.Afterenablingscreen
lock,thedeviceautomaticallylocksafterapreconfiguredperiod;acodeisrequiredtounlock
thedeviceandresumefulloperation.
AudioCodes Private Key
ThesystemsoftwareonAudioCodesNativeTeamsdevices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)
The device does not allow access to 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  all  apps  to  be  digitally- signed  with  a  developer  key  before  installation; 
currently,theAudioCodesNativeTeamsdevicesverifythatappsaresignedbyMicrosoft.
Appsigningpreventsmalicioususer/usersfromreplacingaMicrosoft-signedappwithanapp
that"pretends"tobeMicrosoftbutwhichlackstheprivatekeythatisknownonlytoMicrosoft.
Web Browser
TheAudioCodesNativeTeams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).
WithoutaWebbrowser,malicioususer/userswillnotbeabletoaccessthedeviceandbrowse
fromitasatrusteddeviceintothecustomernetwork.
Remote Configuration Management
AudioCodesNativeTeamsdevicesdonothaveanembeddedWebserver.Configurationand
managementareperformedusingoneofthefollowingremoteinterfaces:
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AudioCodes C455HD Series Specifications

General

SIP Accounts	Up to 16
Wall Mountable	Yes
Connectivity	Ethernet (10/100/1000 Mbps)
Bluetooth	Bluetooth 5.0
USB Ports	2 x USB 2.0
Headset Support	Yes, RJ-9 and USB
Power	PoE (802.3af) or AC adapter
Audio	HD voice, Acoustic echo cancellation, Background noise suppression
Codecs	G.711, G.722, Opus
Operating System	Android based
Supported Protocols	SIP, RTP, SRTP, HTTP, HTTPS, TLS, DHCP, DNS, TFTP
Supported Languages	Multilingual support
Weight	900g