Hello, I noticed that the wiki is not correct when it comes to fax_ident and fax_header: http://wiki.freeswitch.org/wiki/Mod_spandsp#By_mod_spandsp_fax.c - fax_ident - fax identity (numeric only) shown on remote machine during communication. Also may be printed on each page. - fax_header - fax identity (alpha-numeric) show on remote machine during communication. Also may be printed on each page. Fax_ident is the Caller's Station ID (CSID) that can be alpha numeric as well. Fax_header would be used to add a header on top of each page on send. I would be more than happy to fix the wiki page, but not sure what the protocol is. I did try to register to be able to edit the page but never got a password. I found the proper explanation on the mailing list from Steve Underwood:
fax_ident should be set to the telephone number to be used within the fax exchange. This will typically appear on an LCD display at the far end. In theory it should be limited to digits, spaces, + and one or two other characters appropriate to telephone numbers. In practice FAX machines are usually happy with any text, up to 20 characters. This string may also play a part in page headers.
If fax_header is set to a non-null string, a header line will be inserted at the start of each page, just like a typical FAX machine does. The fax_ident, fax_header and the page number will be used to form the text of this line. If you are forwarding FAXes, you probably don't want to add a header line, as there will already be one that was inserted by the original source. If you are sending a locally generated FAX, you probably do want to add header lines to each page.
Regards, Ali Pey