http://www.rmalekghasemi.ir/file/Tenor.zip

https://www.elastix.org/community/threads/forward-all-incoming-calls-to-a-specific-ip-extension.133081

https://www.elastix.org/community/threads/configure-quintum-fxo-with-elastix.45921

https://www.elastix.org/community/threads/how-to-forward-all-calls-to-a-remote-elastix.80123

http://forum.persiannetworks.com/f63/t10238.html

https://www.voipiran.io/forums/9575-rj45-send-recive

http://www.rmalekghasemi.ir/file/Config-Cisco-CME-In-Elastix.pdf

https://community.freepbx.org/t/basic-setup-from-freepbx-to-cisco-28xx-as-voicegateway-with-pri/12846

https://voip.tosinso.com/questions/48755/%D8%B1%D8%A7%D9%87-%D8%A7%D9%86%D8%AF%D8%A7%D8%B2%DB%8C-%D8%AA%D8%B1%D8%A7%D9%86%DA%A9-%D8%A8%DB%8C%D9%86-%D8%B1%D9%88%D8%AA%D8%B1-2911-%D9%88-%D8%B3%D8%B1%D9%88%D8%B1-%D8%A7%D9%84%D8%B3%D8%AA%DB%8C%DA%A9%D8%B3

http://forum.ciscoinpersian.com/showthread.php?t=8605

http://linux-zone.org/forums/voip/elastix/25207-%D8%A2%D9%85%D9%88%D8%B2%D8%B4-%D8%AA%D8%B1%D8%A7%D9%86%DA%A9-sip-%D8%A8%DB%8C%D9%86-%D8%A7%D9%84%D8%B3%D8%AA%DB%8C%DA%A9%D8%B3-%D8%A7%DB%8C%D8%B2%D8%A7%D8%A8%D9%84-%D8%A8%D8%A7-%D8%B1%D9%88%D8%AA%D8%B1-%D8%B3%DB%8C%D8%B3%DA%A9%D9%88-cme

https://community.freepbx.org/t/asterisk-with-sip-trunk-to-cisco-2800-router-resolved/30641

https://ciscohome.ir/%D8%A8%D8%B1%D9%82%D8%B1%D8%A7%D8%B1%DB%8C-%D8%A7%D8%B1%D8%AA%D8%A8%D8%A7%D8%B7-%D8%A8%DB%8C%D9%86-%D8%A7%D9%84%D8%B3%D8%AA%DB%8C%DA%A9%D8%B3-%D9%88-%D8%B3%DB%8C%D8%B3%DA%A9%D9%88/

https://www.voip-info.org/asterisk-connect-2-servers

https://www.voip-info.org/asterisk-dual-servers

https://www.hylafax.org/archive/2000-12/msg00065.php

Try this:
192.168.*


 var/spool/fax/etc/hosts.hfaxd

In config File

/etc/chan_dahdi.conf

Set to Zero

callgroup=0
pickupgroup=0

http://www.rmalekghasemi.ir/file/SipElastix.txt

http://the-asterisk-book.com/1.6/der-context.html

http://linux-zone.org/forums/thread4037.html

http://www.rmalekghasemi.ir/file/pr-new.rar