asterisk users - Apr 2020 - Free Persian Asterisk Book and COVID-19 Pandemic

In the context of the COVID-19 pandemic, Nasim Telecom decided to publish
the first six-captures of Persian Asterisk book that was written by me and
Mr Najafi, published in 2017.
Also it was introduced by Mr. David Duffett in AstriCon 2017 on Florida.
It would be useful for all people which understand Persian language, Also
all other people could use it by going code commands on it and examples.

For downloading it go the following link:

https://www.nasimtelecom.com/en/persian-asterisk-book/

So, be careful and safety at first, Stay at home and read your favourite
books.
With Best Regards.
  --Mojtaba Esfandiari.S
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