B Timer
The B Timer is the maximum amount of time that the Orchestrator will wait for a provisional response to a SIP Invite message (i.e. a SIP 18x response). An extension of PDD, B-Timer moves a call to the next trunk or trunk group if no provisional response is received from the vendor. The portal activates B-Timer is activated when the INVITE is Invite sent to the outgoing trunk and if no does not receive a 100 Trying is received within the allocated time it will expire and roll . If the allocated time exceeds the portal limit, the call rolls over to the next Trunk or Trunk Group if available.
The B-timer Timer value can should be:
between 1-10 and
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smaller than the PDD value.
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The default setting is an empty field. That means B-timer Timer is empty which means it will not be considered unless the field contains an integer value between 1 to 10 is set for it.
Example
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Set PDD
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to 10 seconds
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and B Timer
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to
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3 seconds.