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An extension of PDD, B-Timer moves a call to the next trunk or trunk group if no response is received from the vendor. The portal activates B-Timer is activated when the INVITE is sent to the outgoing trunk and if no does not receive a 100 Trying is received within allocated time it will expire and roll within the allocated time. 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 is not considered unless the field contains an integer value between 1 to 10 is set for it.
Example: set PDD
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to 10 seconds
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and B Timer
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to 5 seconds.