Use this parameter to specify how the ISDN Sub-Address parameter is handled in SIP messages.
% set addressContext <name> zone <name> sipTrunkGroup <name> signaling isubParamPreference <nonstandard | rfc2806 | rfc3966>
ISUB Parameter Preference Parameter
Parameter | Description |
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isubParamPreference | Use this parameter to specify how the ISDN Sub-Address parameter is handled in SIP messages for this SIP trunk group.
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