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ABNF for SIP:  Headers

 

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(80  of  92)

Subscription-State   =
"Subscription‑State"   HCOLON   substate‑value   *( SEMI   subexp‑params )

; example:
;  Subscription‑State: active;expires=60

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substate-value   =
"active"  /  "pending"  /  "terminated"  /  extension‑substate
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extension-substate   =
subexp-params   =
( "reason"   EQUAL   event‑reason‑value )  /
( "expires"   EQUAL   delta‑seconds )  /
( "retry‑after"   EQUAL   delta‑seconds )  /
max‑rate‑param  /  min‑rate‑param  /  amin‑rate‑param  /  generic‑param
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event-reason-value   =
"deactivated"  /  "probation"  /  "rejected"  /  "timeout"  /  "giveup"  /  "noresource"  /  "invariant"  /  event‑reason‑extension
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event-reason-extension    =