
CPE SIP Products
2.1.2.3SIP Headers
The device supports the following SIP Headers:
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 | Table  | 
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 | Header Field | 
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 | Supported | 
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| 
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| 
 | Accept | 
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 | Yes | 
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| 
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| 
 | 
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 | Yes | 
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| 
 | 
 | 
 | 
 | 
 | 
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| 
 | 
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 | Yes | 
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| 
 | 
 | 
 | 
 | 
 | 
 | 
| 
 | Allow | 
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 | Yes | 
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| 
 | 
 | 
 | 
 | 
 | 
 | 
| 
 | Also | 
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 | Yes | 
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| 
 | 
 | 
 | 
 | 
 | 
 | 
| 
 | 
 | 
 | Yes | 
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| 
 | 
 | 
 | 
 | 
 | 
 | 
| 
 | Authorization | 
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 | Yes | 
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| 
 | 
 | 
 | 
 | 
 | 
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| 
 | 
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 | Yes | 
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| 
 | 
 | 
 | 
 | 
 | 
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| 
 | 
 | 
 | Yes | 
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| 
 | 
 | 
 | 
 | 
 | 
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| 
 | Contact | 
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 | Yes | 
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| 
 | 
 | 
 | 
 | 
 | 
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| 
 | 
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 | Yes | 
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| 
 | 
 | 
 | 
 | 
 | 
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| 
 | 
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 | Yes | 
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| 
 | 
 | 
 | 
 | 
 | 
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| 
 | 
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 | Yes | 
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| 
 | 
 | 
 | 
 | 
 | 
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| 
 | 
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 | Yes | 
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| 
 | 
 | 
 | 
 | 
 | 
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| 
 | Cseq | 
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 | Yes | 
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| 
 | 
 | 
 | 
 | 
 | 
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| 
 | Date | 
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 | Yes | 
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| 
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 | 
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| 
 | Diversion | 
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 | Yes | 
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| 
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 | 
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| 
 | Encryption | 
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 | No | 
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| 
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 | 
 | 
 | 
 | 
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| 
 | Expires | 
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 | Yes | 
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| 
 | 
 | 
 | 
 | 
 | 
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| 
 | Fax | 
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 | Yes | 
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| 
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 | 
 | 
 | 
 | 
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| 
 | From | 
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 | Yes | 
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| 
 | 
 | 
 | 
 | 
 | 
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| 
 | 
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 | Yes | 
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| 
 | 
 | 
 | 
 | 
 | 
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| 
 | Join | 
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 | Yes | 
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| 
 | 
 | 
 | 
 | 
 | 
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| 
 | 
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 | Yes | 
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| 
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 | 
 | 
 | 
 | 
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| 
 | 
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 | Yes | 
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| 
 | 
 | 
 | 
 | 
 | 
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| 
 | 
 | 
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 | Yes | 
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| 
 | 
 | 
 | 
 | 
 | 
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| 
 | Organization | 
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 | No | 
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| 
 | 
 | 
 | 
 | 
 | 
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| 
 | 
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 | Yes | 
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| 
 | 
 | 
 | 
 | 
 | 
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| 
 | 
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 | Yes | 
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| 
 | 
 | 
 | 
 | 
 | 
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| 
 | 
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 | Yes | 
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| 
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 | 
 | 
 | 
 | 
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| 
 | 
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 | Yes | 
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| 
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 | 
 | 
 | 
 | 
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| 
 | Priority | 
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 | Yes | 
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| 
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| 
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| 
 | SIP Release Notes | 120 | Document #:  | 
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