[Home](./index.md) > [sip.js](./sip.js.md) > [UserAgentRegisteredOptionTags](./sip.js.useragentregisteredoptiontags.md) ## UserAgentRegisteredOptionTags variable SIP Option Tags Signature: ```typescript UserAgentRegisteredOptionTags: { [option: string]: boolean; } ``` ## Remarks http://www.iana.org/assignments/sip-parameters/sip-parameters.xhtml\#sip-parameters-4