CHAPTER 1 Overview
C448HD C450HD | Users & Administrator's Manual
Upgrading from Android 7 to Android 9 security patch level dated April 5, 2021
●
On most C450HD / C448HD devices, upgrade to version 1.17 is performed with
no further actions required by the user or the network administrator. For
exceptional cases, see the next bullets.
●
Upgrade to 1.17 on C450HD / C448HD can be performed
only if the device was
upgraded to 1.14 before
. Upgrade from 1.14 to 1.17 can be performed through
Microsoft TAC or through AudioCodes Device Manager.
●
Customers upgrading from version 1.8 / 1.10 must take these steps:
✔
Upgrade to 1.14. Since direct upgrade to 1.17 is not possible, the customer
must first upgrade to 1.14 and then to 1.17.
✔
Customers with 1.8 / 1.10 cannot use the TAC to upgrade to 1.17. An
upgrade can be performed using AudioCodes Device Manager or
AudioCodes Android Phone Utility. Contact AudioCodes support for further
assistance.
●
With C450HD 2G-RAM devices (TEAMS-C450HD-DBW), a restore to default will
automatically occur and must be followed with a sign-in by the users (per device);
the device will become non-encrypted, similar to the C450HD non-DBW and the
C448HD that were non-encrypted in previous versions.
AudioCodes Root CA Certificate
The following figure shows the AudioCodes Root CA Certificate.
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