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supports the SIP headers listed in this section.

 

The SBC treats User-Agent and Server headers as known headers beginning in release 4.1.0. The SBC accepts these headers based on ABNF grammar format and restricts them to a maximum of 10 server-vals. You must explicitly turn ON these headers for transparency. Additionally, if a header requires more than 10 server-vals in compliance with ABNF grammar, the header must convert to an unknown header using SMM.

In order to maintain backward capability, as of 4.1.6R0 and 4.2.4R0 releases, SBC relaxes the ABNF grammar formatting to allow invalid syntax server-vals plus an unlimited number of server-vals for these two headers.

The SBC supports up to 20 parameters per SIP header to accommodate enhanced services such as IMS and VoLTE using call flows such as ICS and SRVCC.

 

SIP Header List

Key:

(tick) = Supported
(error) = Not supported

 

A

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SIP Header

Supported Feature
Release Added
(since 3.1.7)
SendReceive and Process
Accept(tick)(tick) 
Accept-Contact|a(tick)(tick) 
Accept-Language(tick)(tick)4.0.0
Accept-Resource-Priority(tick)(tick) 
Alert-Info (tick)(tick) 
Allow(tick)(tick) 
Also(tick)(tick) 
Anonymity(tick)(tick) 
Authorization(tick)(tick) 

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C

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SIP Header

Supported Feature
Release Added
(since 3.1.7)
SendReceive and Process
CallConnectId(tick)(tick) 
Call-ID|i(tick)(tick) 
Call-Info(tick)(tick) 
Contact|m(tick)(tick) 
Content-Disposition(tick)(tick) 
Content-Type|c(tick)(tick) 
Content-Encoding|e(tick)(tick) 
Content-Length|l(tick)(tick) 
CSeq(tick)(tick) 

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D

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SIP Header

Supported Feature
Release Added
(since 3.1.7)
SendReceive and Process
Diversion(tick)(tick) 

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E

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SIP Header

Supported Feature
Release Added
(since 3.1.7)
SendReceive and Process
Error-Info (tick)(tick) 
Event|o(tick)(tick) 
Expires(tick)(tick) 

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F

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SIP Header

Supported Feature
Release Added
(since 3.1.7)
SendReceive and Process
Feature-Caps(tick)(tick)5.1.0
Flow-Timer(tick)(error)4.0.0
From|f(tick)(tick) 

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G

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SIP Header

Supported Feature
Release Added
(since 3.1.7)
SendReceive and Process
Geolocation(tick)(tick) 
Geolocation-Error(tick)(tick) 
Geolocation-Routing(tick)(tick) 

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H

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SIP Header

Supported Feature
Release Added
(since 3.1.7)
SendReceive and Process
History-Info(tick)(tick) 

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I

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SIP Header

Supported Feature
Release Added
(since 3.1.7)
SendReceive and Process
Info-Package(tick)(tick) 5.1.0

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M

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SIP Header

Supported Feature
Release Added
(since 3.1.7)
SendReceive and Process
Max-Forwards(tick)(tick) 
MIME-Version(tick)(tick) 
Min-Expires(tick)(tick) 
Min-SE(tick)(tick) 

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O

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SIP Header

Supported Feature
Release Added
(since 3.1.7)
SendReceive and Process
Overload-Control(tick)(tick) 

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P

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SIP Header

Supported Feature
Release Added
(since 3.1.7)
SendReceive and Process
P-Access-Network-Info(tick)(tick) 
P-Area-Info(tick)(tick) 
P-Asserted-Identity(tick)(tick) 
P-Associated-URI(tick)(tick) 
Path(tick)(tick) 
P-Asserted-Service(tick)(error)5.1.0
P-Called-Party-ID(tick)(tick) 
P-Carrier-Info(tick)(tick) 
P-CDR-Info (tick)(tick) 
P-Charge-Info(tick)(tick) 
P-Charging-Function-Addresses (tick)(tick) 
P-Charging-Vector(tick)(tick) 
P-ChgMsg-Info(tick)(tick) 
P-DCS-Billing-Info(tick)(tick)4.0.0
P-DCS-LAES (error)(tick) 
P-Early-Media(tick)(tick) 
"P-K-Adn"(tick)(error) 
P-K-Cfl(tick)(tick) 
P-K-Cfo(tick)(tick) 
P-Orig-CA(tick)(tick) 
P-Preferred-Identity(tick)(tick) 
P-Profile-Key(tick)(tick)5.1.0
Privacy(tick)(tick) 
Proxy-Authenticate(tick)(tick) 
Proxy-Authorization(tick)(tick) 
Proxy-Require(tick)(tick) 
P-Sig-Info (tick)(tick) 
P-Svc-Info (tick)(tick) 
P-Term-CA(tick)(tick) 
P-Visited-Network-ID(tick)(tick) 

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R

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SIP Header

Supported Feature
Release Added
(since 3.1.7)
SendReceive and Process
RAck(tick)(tick) 
Reason(tick)(tick) 
Record-Route(tick)(tick) 
Recv-Info(tick)(tick)5.1.0
Referred-By|b(tick)(tick) 
Refer-Sub(tick)(tick)4.0.0
Refer-To|r(tick)(tick) 
Remote-Party-ID(tick)(tick) 
Replaces(tick)(tick) 
Reply-To(tick)(tick) 
Requested-By(tick)(tick) 
Require(tick)(tick) 
Resource-Priority(tick)(tick) 
Retry-After(tick)(tick) 
Route(tick)(tick) 
RSeq(tick)(tick) 

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S

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SIP Header

Supported Feature
Release Added
(since 3.1.7)
SendReceive and Process
Security-Client(tick)(tick) 
Security-Server(tick)(tick) 
Security-Verify(tick)(tick) 
Server(tick)(tick)4.0.0
Service-Route(tick)(tick) 
Session-Expires|x(tick)(tick) 
Sip-Etag(tick)(tick)4.0.0
Sip-If-Match(tick)(tick)4.0.0
Subscription-State(tick)(tick) 
Supported|k(tick)(tick) 
Suppress-If-Match(tick)(tick)4.0.0

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T

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SIP Header

Supported Feature
Release Added
(since 3.1.7)
SendReceive and Process
Target-Dialog(tick)(tick) 
Timestamp (tick)(tick) 
To|t(tick)(tick) 

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U

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SIP Header

Supported Feature
Release Added
(since 3.1.7)
SendReceive and Process
UnSupported(tick)(error) 
User-Agent(tick)(tick)4.0.0
User-to-User(tick)(tick) 

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V

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SIP Header

Supported Feature
Release Added
(since 3.1.7)
SendReceive and Process
Via|v(tick)(tick) 

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W

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SIP Header

Supported Feature
Release Added
(since 3.1.7)
SendReceive and Process
Warning (tick)(tick)4.0.0
WWW-Authenticate(tick)(tick) 

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X

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SIP Header

Supported Feature
Release Added
(since 3.1.7)
SendReceive and Process
X-ATP(tick)(tick) 
X-AUT(tick)(tick) 
X-BCI(tick)(tick) 
X-CALLING-NUM(tick)(tick) 
X-Carrier-Info(tick)(tick) 
X-CHGDelay(tick)(tick) 
X-CHGInfo (tick)(tick) 
X-CONTRACT-ADDR(tick)(tick) 
X-EMG(tick)(tick) 
X-FCI(tick)(tick) 
X-FWDORIG-NUM(tick)(tick) 
X-GENERIC-NUM(tick)(tick) 
X-ISUPEvent(tick)(tick) 
X-ISUPMtype(tick)(tick) 
X-NOCI(tick)(tick) 
X-OBCI(tick)(tick) 
X-ORIGCLD-NUM(tick)(tick) 
X-REDBWDINF(error)(tick) 
X-REDCAP(tick)(tick) 
X-REDCNT(tick)(tick) 
X-REDFWDINF(tick)(tick) 
X-Service-Indicator(tick)(tick) 
X-Service-Type(tick)(tick) 
X-TMR(tick)(tick) 
X-USI(tick)(tick) 

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