Hello,
hopefully someone here with the RFC fresh in mind and its grammar for sip uri parameter can jump on to clarify if the value of the parameter can be changed to lower/upper case.
For a specific example, is it allowed that the value of a parameter in contact header uri is changed to upper/lower case when building the sequential request (so this appears in request uri)? Same would be for Recor-Route uri parameter that would appear later in Route headers...
Cheers, Daniel