HI 

I used asterisk 13’s  app_fax to send and recv fax. On the received fax/pdf,  I got a fax with header like this:
26-Ju-2019 | 06:03|  my-test | unknown | p.1

The my-test is  set by LOCALHEADERINFO before I call send_fax. What I am not clear is where does **unknown** come from?
The doc at:Asterisk 13 Application_SendFAX_app_fax – Asterisk Project – Asterisk Project Wiki said:
This application sets the following channel variables:

– LOCALSTATIONID – To identify itself to the remote end
– LOCALHEADERINFO – To generate a header line on each page
– FAXSTATUS
– SUCCESS
– FAILED

– FAXERROR – Cause of failure
– REMOTESTATIONID – The CSID of the remote side
– FAXPAGES – Number of pages sent
– FAXBITRATE – Transmission rate
– FAXRESOLUTION – Resolution of sent fax
–

I tried set LOCALSTATIONID, REMOTESTATIONID on before send_fax , but I still got unknown in the header.

So my question is where/how to replace the “unknown”?

Thanks

min