Revolabs FLX2 VoIP Advanced - Manual (Page 62)

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When this field is specified, the phone will register with the primary
SIP registrar (The “Registrar” field) if it is accessible. If the
primary SIP registrar becomes inaccessible via UDP or TCP, the
phone will attempt to register with the backup registrar. If the
phone successfully registered with backup registrar, it will switch
to the backup registrar to perform outgoing calls and receive
incoming calls. While the phone is registered with the backup
registrar, it will monitor the primary SIP registrar connection. Once
the primary SIP registrar becomes available again, the phone will
roll back to register with the primary registrar and route SIP traffic
from/to the primary registrar.
Use Proxy for
Registration Use this option to indicate whether or not the SIP proxy server(s)
specified in the Outbound Proxy field should be used when
registering. Select “Use Outbound Proxy” to have the system add
listed proxy servers to the route headers of the SIP REGISTER
request.
Outbound Proxy Enter the outbound SIP proxy server’s IP address or name in the
Outbound Proxy field. If there are multiple SIP proxies, separate
the addresses by a comma. Also note that on the SIP Settings
page there’s an option to allow strict routing. If that option is set
and you have a SIP proxy that is configured for loose routing, add
the “;lr” designation after the proxy’s address, for example,
“10.134.129.101;lr”.
ID ID is the phone’s SIP ID used for SIP registration. If this field is left
blank, the Username field will be used as the ID.
Display Name Display Name is the string that is shown at the far side when you
make outbound calls. If you do not provide a Display Name, the
Username will be used. Please note that your IP PBX might
override the Display name sent by the FLX and replace it with
names configured in the PBX.
Username This is the username for the account used to authentication with
the SIP registrar and proxies.
Password This is the password for the account used to authenticate with the
SIP registrar and proxies.
Registration
Timeout Registration Timeout is the optional timeout for SIP account
registration, in seconds. The default is 55. If set to 0, the default
will be used.
Auto Re-
registration Retry
Interval If SIP registration is unsuccessful, this field specified the time
duration between retry attempts, in seconds. The default is 300
seconds (5 minutes).