If it is really a requirement to not change ANY headers, then no.
On Wednesday, August 12, 2015, Jurijs Ivolga <jurij.ivo@gmail.com> wrote:
JurijsWith kind regards,Thank you!Hi,I need to receive call on Freeswitch and Loopback it to original server from where it came into, without changing any SIP header(to, from, SIP request and etc). Is there easy way to do this?