CHAPTER60 Configuration Parameters Reference
Mediant 4000 SBC | User's Manual
Parameter Description
'Registration Time'
configure voip > sip-
definition proxy-and-
registration >
registration-time
[RegistrationTime]
Defines the time interval (in seconds) for registering to a
Proxy server. The value is used in the SIP Expires
header. The parameter also defines the time interval
between Keep-Alive messages when the parameter
EnableProxyKeepAlive is set to 2 (REGISTER).
Typically, the device registers every 3,600 sec (i.e., one
hour). The device resumes registration according to the
parameter RegistrationTimeDivider.
The valid range is 10 to 2,000,000. The default is 180.
'Re-registration Timing [%]'
configure voip > sip-
definition proxy-and-
registration > re-
registration-timing
[RegistrationTimeDivider]
Defines the re-registration timing (in percentage). The
timing is a percentage of the re-register timing set by the
Registrar server.
The valid range is 50 to 100. The default is 50.
For example: If the parameter is set to 70% and the
Registration Expires time is 3600, the device re-sends
its registration request after 3600 x 70% (i.e., 2520 sec).
Note: The parameter may be overridden if the
parameter RegistrationTimeThreshold is greater than 0.
'Registration Retry Time'
configure voip > sip-
definition proxy-and-
registration >
registration-retry-time
[RegistrationRetryTime]
Defines the time interval (in seconds) after which a
registration request is re-sent if registration fails with a
4xx response or if there is no response from the
Proxy/Registrar server.
The default is 30 seconds. The range is 10 to 3600.
Note: Registration retry time can also be configured
with the MaxRegistrationBackoffTime parameter.
'Max Registration Backoff Time'
configure voip > sip-
definition proxy-and-
registration > max-
registration-backoff-time
[MaxRegistrationBackoffTime]
Defines a dynamic time-to-wait interval before the
device attempts to register the SIP entity again after a
registration failure. The parameter is applicable only to
registrations initiated by the device on behalf of SIP
entities (for example, User Info, Accounts, Endpoints or
the device itself) with a SIP proxy server (registrar).
The valid value is 0 to 3000000 (i.e., 3 million seconds).
The default is 0 (i.e., disabled).
In contrast to the RegistrationRetryTime parameter,
which defines a fixed time to wait between registration
attempts due to registration failure, this parameter
configures the device to increase the time-to-wait
interval for each subsequent registration attempt (per
RFC 5626, Section 4.5) for a specific registration flow.
In other words, the interval changes between
registration attempts.
The parameter operates together with the
RegistrationRetryTime parameter. When the
MaxRegistrationBackoffTime parameter is configured,
the wait-time before another registration attempt
increases after each failed registration (until it reaches
the maximum value specified by the parameter).
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