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Use this parameter to specify how the ISDN Sub-Address parameter is handled in SIP messages.

Command Syntax

% set addressContext <name> zone <name> sipTrunkGroup <name> signaling isubParamPreference <nonstandard | rfc2806 | rfc3966>

Command Parameters

ISUB Parameter Preference Parameter

ParameterDescription
isubParamPreferenceUse this parameter to specify how the ISDN Sub-Address parameter is handled in SIP messages for this SIP trunk group.
  • nonstandard – When receiving, treat the percentage character (%) as an escape character. When sending, do not include characters not allowed by certain proxies.
  • rfc2806 (default) – Use for default behavior when handling ISUB parameter.
  • rfc3966 – Encode/decode the ISUB parameter based on the ABNF for ISUB specified in RFC 3966.
 

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