There is plenty of information on call files used by Asterisk to make calls, create small conferences etc.
Although information is not very well documented.
I was looking for a way to make calls from the phonebook, not only from local extensions but to be able to connect any two phones in US or International.
Here is a my phonebook interface:


Phone call can be initiated by clicking on a view icon and details layer shown with ability to initiate a phone call:



Phonebook program will create one of a call file, depending weather "Call From" number is local extension or outside number.

Call file for local extension 449 "Call From" number to 1-212-555-1212:


Call file for outside phone 1-917-555-1212 "Call From" number to 1-212-555-1212:


Using Local instead of SIP/Trunk_name make call go through pre-set dial plans accordingly for Domestic and International calls and firing-up call recordings and CDR properly.

Call file created on LAN machine other than FreePBX box and then scp and ssh used to copy them to Asterisk "ougoing" folder and "chown" file.
I'e. copy file:

Chown file appropriately for Asterisk:

Call initiated almost immediately after file chown-ed.

For "scp" and "ssh" to work without a password - passwordless login has to be setup between two machines:
https://www.codemacs.com/coding/applescript/ftp-like-commands-and-remote-osascript-on-macs.5918921.htm

If you see anything that could be improved - your comments would be greatly appreciated.There's no place like ~

There are two issues with original post:
1. It's best to move (mv) call file from local file on Asterisk box
2. Call files above would always call twice the numbers in them and if call recording is enabled - two recordings will be recorded for one call (one for each party).

Here is the solutions for the issues above
Copy files from your machine to the temp directory on Asterisk box, chown file there and then move file:

This will ensure proper call file handling by Asterisk.

Call files need to be created differently (at least as understood with current knowledge I have) for the calls to/from different destinations:
Call from local extension 635 to outside number 1-212-555-1212:


Call from local extension 635 to local extension 636:


Call from outside number 1-570-555-1212 to outside number 1-212-555-1212


Perl script actually creates call files based on data provided by the form input and checking against phonebook data and length of the phone number.There's no place like ~