AudioCodes C470HD - Page 105

Release Notes 3. Previous Releases
Version 2.3.410 105 400HD Series IP Phones for Teams
 Automatic Time Zone Detection. Starting from this version release, a new
mechanism was added that allows the device to automatically detect the time zone via
geographical location. If time zone is not provisioned using the Device Manager, this
feature is implemented.
 Improved background noise block [Applies to C450HD and C448HD]. When a
user speaks on the phone in handset mode, ambient noise (noise from the device’s
immediate environment) is suppressed and not heard by the far end participant/s of
the call or Teams Meeting. Starting from this release, the feature is enabled by default.
 Security updates
• Security enhancement. Starting from this version release,
the device does not allow access to ADB, and SSH is by
default disabled and can be enabled with Administrator
permissions.
• Security patch level for Android devices. AudioCodes
regularly adopts and integrates Android security updates. In
this release, the C470HD device was updated with Android
security patch level (June 2021).
 Bluetooth Wideband Speech (WBS) is now supported for headsets. [Applies to the
C450HD phone; the C470HD already supports WBS for headsets].
 For recovery purposes, firmware can be applied to a phone from a USB disk. To
apply the firmware from the USB disk, network administrators enter recovery mode by
long-pressing the reset key for 4 seconds (C470HD) or by simultaneously pressing the
‘back’ key + the MENU key (other phones); the device’s LED lights up red. The
network administrator then inserts the USB disk with the target firmware, chooses the
‘Apply update from USB disk’ option (see the figure below) and then chooses the
correct firmware image from the disk.
 [Applies only to the C470HD phone] The ‘home’ key supports new functionalities:
• Illuminated red
constantly (without flashing) indicates ‘No
network’; touching the key then gives the user direct access
to the Network menu.
• Flashing red indicates a system alert, for example, when a
user tries to charge via the device’s USB port (see previous
feature description).
• Flashing yellow indicates that the phone is in the process of
a software upgrade.
 New capability allows the network administrator to install a third-party certificate on
the Teams phone in the customer’s trusted environment. Network administrators
should follow the following guidelines when replacing the existing trusted CAs:
• The device certificate URL will only be valid if no SCEP
server URL is present
• Use the following two parameters to set the device certificate
in the phone's configuration file:
♦ security/device_certificate_url=http://<server-ip>/device.crt
♦ security/device_private_key_url=http://<server-ip>/device.key