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ABNF for SIP Headers

(55  of  93)

Reason =
"Reason"  HCOLONreason‑value  *( COMMAreason‑value )

; examples:
;  Reason: SIP;cause=200;text="Call completed elsewhere"
;  Reason: Q.850;cause=16;text="Terminated"
;  Reason: SIP;cause=600;text="Busy Everywhere"
;  Reason: SIP;cause=580;text="Precondition Failure"
;  Reason: preemption;cause=1;text="UA Preemption"
;  Reason: preemption;cause=2;text="Reserved Resources Preempted"
;  Reason: preemption;cause=3;text="Generic Preemption"
;  Reason: preemption;cause=4;text="Non-IP Preemption"

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reason-value =
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protocol =
"SIP" /  "Q.850" / 
"Preemption" /  ; see  RFC 4411Section 5
; the following in  3GPP TS 24.229Clause 7.2A.18
; -----
"EMM" /
; EPS Mobility Management
; see  3GPP TS 24.301 – subclause 9.9.3.9
"ESM" /
; EPS Session Management
; see  3GPP TS 24.301 – subclause 9.9.4.4
"S1AP-RNL" /
; Radio Network Layer
; see  3GPP TS 36.413
"S1AP-TL" /
; Transport Layer
; see  3GPP TS 36.413
"S1AP-NAS" /
; Non-Access Stratum
; see  3GPP TS 36.413
"S1AP-MISC" /
; Miscellaneous
; see  3GPP TS 36.413
"S1AP-PROT" /
; Protocol
; see  3GPP TS 36.413
"DIAMETER" /
"IKEV2" / "RELEASE_CAUSE" / 
; 1  User ends call
; 2  RTP/RTCP time-out
; 3  Media bearer loss
; 4  SIP timeout - no ACK
; 5  SIP response time-out
; 6  Call-setup time-out
 
"FAILURE_CAUSE" / 
; 1  Media bearer or QoS lost
; 2  Release of signalling bearer
; 3  Indication of failed resources allocation
 
; -----
token
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reason-params =
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protocol-cause =
"cause"  EQUALcause
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cause =
1*DIGIT
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reason-text =
"text"  EQUALquoted‑string
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isup-cause-location =
"location"  EQUALisup-location-value
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isup-location-value =
"U" /
; for  0 0 0 0  user
"LPN" /
; for  0 0 0 1  private network serving the local user
"LN" /
; for  0 0 1 0  public network serving the local user
"TN" /
; for  0 0 1 1  transit network
"RLN" /
; for  0 1 0 0  public network serving the remote user
"RPN" /
; for  0 1 0 1  private network serving the remote user
"LOC-6" /
; for  0 1 1 0  spare
"INTL" /
; for  0 1 1 1  international network
"LOC-8" /
; for  1 0 0 0  spare
"LOC-9" /
; for  1 0 0 1  spare
"BI" /
; for  1 0 1 0  network beyond interworking point
"LOC-11" /
; for  1 0 1 1  spare
"LOC-12" /
; for  1 1 0 0  reserved for national use
"LOC-13" /
; for  1 1 0 1  reserved for national use
"LOC-14" /
; for  1 1 1 0  reserved for national use
"LOC-15" /
; for  1 1 1 1  reserved for national use
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reason-extension =
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