HMR for tag

Hello,

 

Need help in using element rules.

 

I have an call tag parameter in To header

To: <sip:+1234445@10.27.0.5;user=phone>;tag=fd79b70b;psei=237f7sdff881

I need to store it into another parameter and replace with a special value, but this just removes parameters from To header.

How to work correctly with parameters?

 

sip-manipulation
        name                           chgTag
        description                    
        split-headers                  
        join-headers                   
        header-rule
                name                           addOldTag
                header-name                    To
                action                         manipulate
                comparison-type                pattern-rule
                msg-type                       response
                methods                        INVITE
                match-value                    
                new-value                      
                element-rule
                        name                           saveTag
                        parameter-name                 tag
                        type                           header-param
                        action                         store
                        match-val-type                 any
                        comparison-type                pattern-rule
                        match-value                    
                        new-value 
               element-rule 
                        name oldTag 
                        parameter-name                 oldtag 
                        type                           header-param 
                        action                         add