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4.5.1.11 Timer Settings
T1 Timer
Description Selects the default interval, in milliseconds, between transmissions of
SIP messages. For details, refer to RFC 3261.
Value Range
• 250
• 500
• 1000
• 2000
• 4000
Default Value 500
Configuration File Reference SIP_TIMER_T1 (Page 304)
T2 Timer
Description Selects the maximum interval, in seconds, between transmissions of
SIP messages. For details, refer to RFC 3261.
Value Range
• 2
• 4
• 8
• 16
• 32
Default Value 4
Configuration File Reference SIP_TIMER_T2 (Page 304)
Timer B (milliseconds)
Description Specifies the value of SIP timer B (INVITE transaction timeout timer),
in milliseconds. For details, refer to RFC 3261.
Value Range 250–64000
Default Value 32000
Configuration File Reference SIP_TIMER_B (Page 311)
Timer D (milliseconds)
Description Specifies the value of SIP timer D (wait time for answer resending), in
milliseconds. For details, refer to RFC 3261.
Value Range 0, 250–64000
Default Value 5000
Configuration File Reference SIP_TIMER_D (Page 312)
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