We are using http auto-provisioning to setup Grandstream phone.
We tried to keep configuration field empty for outbound proxy in template(e.g. P48/P403/P503 in advaanced setting) but it always be filled with the IP of host setting in .xml configuration phone via http.
We do not want to setup outbound proxy because it cause problem when only secondary SIP server working.
Can someone let me know how to keep outbound proxy setup empty in xml config file?