ATL Telecom IP-3072 PoE Smart Office IP Telephone - Manual (Page 41)

Page 41
MOCET IP3072 Smart Office IP Desk Phone Administrator Guide
To use backup servers, you need to configure the Backup Proxy Server and Port fields
and the Backup Registrar Server and Port fields as the following illustration.
SIP Servers Registration Procedure
From the following illustration, you can learn how a phone registers to the first SIP servers
and when it will use the backup servers.
Received 200 OK?
Start Retry
Timer
Send REGISTER to
Backup SIP Server
Has Valid SIP
server?
Send REGISTER to
First SIP Server
Start
Received 200 OK?
Has Backup SIP
Server?
Y
N
N
N
Y
Stop
Start Refresh
Timer
Registered
Y
TimeOut
Refresh
Start Refresh
Timer
Registered
Y
TimeOut
Refresh
N
TimeOut
Retry