How to add transport=UDP to Contact/From/To headers

Asterisk Asterisk SIP
1

Hi,

I need to add “trasport=UDP” to the Contact , From and To headers.
I am using chan_sip driver. How can I configure this ?

Thanks.

2

You should fix the peer instead. transport=UDP is the default and is not needed.

3

so, I should make the remote side accept the headers without “transport=UDP” ?
but it is an SBC of the ISP; I can’t change the behaviour there.

4

There is no configuration for this. You’d have to modify the code if you really need it.