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| − | == Description of parameters ==
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| − | These parameters are common to every other instance created afterward (i.e. networks, userparts, interfaces, circuits).
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| − | The timers have the following definitions; all timer values must be expressed in milliseconds):
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| − | {| class="wikitable" border="1"
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| − | ! width="150" style="background:#efefef;" |Timer
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| − | ! width="350" style="background:#efefef;" |Description
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| − | |-
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| − | | T18 Timer|| GROUP BLOCKING message sent. Terminated normally when GROUP BLOCKING ACKNOWLEDGMENT is received. Typical values are 15 to 60 seconds.
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| − | | T19 Timer || INITIAL GROUP BLOCKING message sent. Terminated normally when GROUP BLOCKING ACKNOWLEDGMENT is received. Typical values are 5 to 15 minutes.
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| − | |-
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| − | | T20 Timer|| GROUP UNBLOCKING message sent. Terminated normally when GROUP UNBLOCKING ACKNOWLEDGMENT is received. Typical values are 15 to 60 seconds.
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| − | |-
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| − | | T21 Timer|| INITIAL GROUP UNBLOCKING message sent. Terminated normally when GROUP UNBLOCKING ACKNOWLEDGMENT is received. Typical values are 5 to 15 minutes.
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| − | |-
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| − | | T22 Timer|| GROUP RESET sent timer. Terminated normally at the receipt of the acknowledgment. Typical values are 15 to 60 seconds.
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| − | |-
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| − | | T23 Timer|| INITIAL GROUP RESET sent timer. Terminated normally when acknowledgment is received. Typical values are 5 to 15 minutes.
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| − | |-
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| − | | T28 Timer|| CIRCUIT GROUP QUERY sent timer. Terminated normally when CIRCUIT GROUP QUERY RESPONSE message is received. When this alarm expires, an alarm is generated. Typical value is 10 seconds.
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| − | |-
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| − | | FGR Timer|| ANSI and Telcordia FIRST GROUP received timer. A typical value is 5 seconds.
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| − | |}
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| − | '''NOTE:''' ITU variants do not support FGR Timer. Therefore, the timer does not need to be configured for these variants.
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| − | '''NOTE:''' The following timers are not required for the UK: T28
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