Hi, I'm writing a SIP UA which needs to listen on two UDP ports. I created a single endpoint using pjsip_endpt_create() and then added multiple transports to it using pjsip_udp_transport_start() When I send a message to the first UDP port, its received and I use pjsip_endpt_respond_stateless() to send the responses. My problem is the responses don't go out the first transport created on the first UDP port. They use the 2nd transport and go out the 2nd UDP port. Does the endpoint support multiple transports of the same type? Is there anyway to specify the transport I'd like to use to send a response message from? Should I instead be creating multiple endpoints and create a transport on each one? Thanks, Tom