Custom Header field in Invite

 

Hi,

 

I have a situation where Node-A has to pass some information (alphanumeric string up to 100 characters) to Node-B passing via my Acme 4500 SBC. Is there a way to pass such information (other than simply adding that to "To" or "From" header) in INVITE message - either something that SIP standard specifies or any custom field?

 

I also want Acme to simply allow that message to pass through - if it is non-standard field.

 

Thanks,