Example

PUT /ffws/v1/t38 HTTP/1.1 
content-type: application/xml 
authorization: Basic YWRtaW46YWRtaW4= 
<?xml version=”1.0” encoding=”UTF-8”?> 
	<t38>
		<fax_id>FF240-IP</fax_id>
		<max_rate>14400</max_rate>
		<fax_method>T.38 Re-Invite</fax_method>
		<error_correction>true</error_correction>
		<fax_codec>alaw,ulaw</fax_codec>
		<dial_prefix></dial_prefix>
		<redundancy_level>3</redundancy_level>
		<jitter_buffer_delay>300</jitter_buffer_delay>
		<max_buffer>4000</max_buffer>
		<max_datagram>948</max_datagram>
		<extension_source>SIP To Header</extension_source>
		<extension_digits>Use All</extension_digits>
		<extension_length>0</extension_length>
		<channel_reservation_inbound>0</channel_reservation_inbound>
		<channel_reservation_outbound>0</channel_reservation_outbound>
	</t38>
----------------------------------- 
HTTP/1.1 200 OK 
content-type: application/xml
<?xml version=”1.0” encoding=”UTF-8”?>
<response>
	<message>Modified</message>
</response>