Specifications

The following table summarizes the phone's specifications.

Specifications

Feature

Details

Media Processing
■ Voice Coders: G.711 codec PCMA (A-Law), G.711 codec PCMU (μ-Law), G.722
■ Acoustic Echo Cancelation: G.168-2004 compliant, 64-msec tail length
■ Ambient noise block
■ 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 and security:
✔ Sign in with user credentials and based on IP phone policies
✔ Sign in using PC/Smartphone
✔ Modern Authentication
✔ Phone lock/unlock; unlock with smart PIN
✔ 802.1x Authentication
✔ SSH access
✔ HTTP/HTTPS Proxy Server
✔ VLAN (LLDP/CDP/manual)
■ Incoming/Outgoing P2P and PSTN calls
■ In-call controls via UI
■ Calendar and Presence integration and meeting actions

For a detailed list of features, see Teams Features Supported by the C455HD Phone.

Configuration and Management
■ Teams admin center (TAC) for provisioning and logging
■ AudioCodes OVOC / Device Manager
■ AudioCodes Redirect Server

Debugging Tools
■ AudioCodes' Android Device Utility (see Android Device Utility)
■ Log upload to Microsoft server (certification for 3rd party Skype for Business clients)
■ Remote logging via Syslog
■ Diagnostic data
■ SSH Access
■ Capturing the phone screen
■ TCPdump
■ Audio Debug recording logs
■ Media logs (*.blog)
■ Port mirroring network monitoring
■ Remote Packet Capture network sniffer application

Localization Support
■ Multi-lingual support; the language pack list is not yet final and is subject to modification.
■ Virtual Keyboard: QWERTY | Numeric
■ Global Network Banner
■ Dark Theme

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
■ C455HD with DBW suffix flavor:
● White USB port - host port for USB headset
● Black USB port - default port but can be configured to host 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

✔ USB port for USB headset. Note that the phone is a PoE Class 3 device (also when connecting a standard USB headset). If used with a loud USB speakerphone, an external power supply must be used. For more information, contact AudioCodes.
✔ RJ-11 interface
✔ Survivable Branch Appliance (SBA)
■ Wireless connectivity (applies to devices with DBW (Dual Band Wi-Fi), as specified in their name):
✔ Dual band 2.4GHz/5GHz, 802.11b/g/n Wi-Fi support
✔ Wi-Fi supported protocols: WEP, WPA/WPA2-Personal, WPA3-Personal, WPA/WPA2-Enterprise, WPA3-Enterprise, WPA3-Enterprise 192-bit (802.1X) PEAP only
■ Integrated optional Bluetooth support (applies to devices with DBW):
✔ Bluetooth headset support
✔ Microsoft Better Together for device pairing
✔ Max. # of Bluetooth devices that can connect simultaneously to device: 1
✔ Bluetooth Wideband Speech (WBS) supported for headsets
■ Expansion Module (optional)
■ Mounting:
✔ Wall and desktop mounting options
✔ One angle for desktop mount, another angle for wall mount
■ Power:
✔ 12V DC jack
✔ Power supply AC 100 ~ 240V
✔ PoE Class 3: IEEE802.3af (optional)
■ Keys:
✔ Illuminated VOICE MAIL message hotkey
✔ 4-way navigation button with OK key
✔ MENU
✔ HOLD
✔ Illuminated MUTE hotkey
✔ TRANSFER
✔ VOLUME control key
✔ Illuminated HEADSET hotkey
✔ Illuminated SPEAKER hotkey
✔ BACK
✔ CONTACTS
✔ AC key – for future use – currently used as home key

Teams Features Supported by the C455HD Phone

Teams Feature

Mute

√

Hold/Resume

√

Call Transfer

√

Consultative Transfer

√

End call

√

Escalate P2P call to Teams Meeting / Conference (Add-hoc Conference)

√

Call Queue

√

Contacts / People

√

Speed Dials dedicated keys

√

Auto-dialing to call an extension

√

Favorites list for speed dial

Distinctive ringtone per call type

√

√

Hot Desking

√

Survival Branch Appliance

√

Talkback

√

Meeting details: Exchange calendar, contact pictures, Corporate Directory access

√

Meeting actions: Meet Now, one-click join, Join Skype for Business meetings, meeting call controls (mute/unmute, hold/resume, hang up, add/remove participant, raise hand, live captions)

√

Hot Desking

√

Common Area Phone (CAP)

√

CAP: Advanced calling

√

CAP: Voice Mail (only applicable when 'CAP: Advanced calling' is enabled)

√

Music on Hold (MoH)

√

Call Park

√

Call Merge

√

Delegation

√

E911

√

Better Together (over wireless)

Supported only for C455HD with DBW suffix

AudioCodes Device Duo

√

Survivable Branch Appliance (SBA)

√

Talkback

√

Call Group Pickup

Supported, but configured from Teams client

See also here for related Microsoft documentation.