Description: 
Enables or disables the IP phone to register to the secondary server when sending 
requests to the secondary server in the failover mode. 
0-Disabled 
1-Enabled 
X ranges from 1 to 16 (for SIP-T48G/T46G/T29G). 
X ranges from 1 to 12 (for SIP-T42G). 
X ranges from 1 to 6 (for SIP-T41P/T27P). 
X ranges from 1 to 3 (for SIP-T23P/G). 
X ranges from 1 to 2 (for SIP-T21(P) E2). 
Web User Interface: 
None 
Phone User Interface: 
None 
To configure server redundancy for fallback purpose via web user interface: 
1.  Click on Account->Register. 
2.  Select the desired account from the pull-down list of Account. 
3.  Configure registration parameters of the selected account in the corresponding 
fields.