
Contents
General Information  | 2  | 
Release Content Information  | 2  | 
Hardware Supported  | 2  | 
Bootloader Requirements  | 2  | 
Before you Upgrade  | 3  | 
Please Read Before Upgrading the Phones to Release 2.3  | 3  | 
New Features in Release 2.3  | 4  | 
Description  | 4  | 
Network Features  | 7  | 
Link Layer Discovery Protocol for Media Endpoint Devices   | 7  | 
DHCP Options 159 and 160 for the Configuration Server  | 12  | 
DHCP Option 12 Hostname for the Configuration Server  | 15  | 
DHCP Option 77 User Class for the Configuration Server  | 18  | 
Multiple DHCP Servers  | 21  | 
Security Features  | 22  | 
Configuration File Encryption  | 22  | 
HTTPS Server Certificate Validation  | 23  | 
XML Features  | 29  | 
XML Execute Commands for Playing a WAV File  | 29  | 
RTP Recording and Simultaneous Playing (not supported on 51i)  | 31  | 
Dialpad Passthrough for Objects  | 34  | 
35  | |
New XML URI Variables  | 35  | 
XML Web Applications Button  | 35  | 
XML Key Redirection  | 36  | 
Options Key Redirection  | 
  | 
(for Options Menu on all phones and Services Menu on 51i)  | 39  | 
XML Applications and   | 41  | 
XML URI for Key Press Simulation  | 42  | 
Using XML Commands to Reset Local Data on the Phone  | 45  | 
Action URI Disconnected Feature  | 46  | 
User Interface Features  | 49  | 
Preferred Line Focus Feature  | 49  | 
Dialpad Speeddial Supported on All Phones  | 52  | 
UTF- 8 Codec for   | 55  | 
Addition of New Timezone and Country Codes  | 56  | 
............................................................................................................................................................  | 57  | 
Contents
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