Help with configring sip trunk for lync skype for business

hi

i am trying to setup my lab to learn Lync. I tried to folllow this video.

while i do not have any sip trunk from service provider so i haven’t configured that part but followed all the video through to the end.

but i cannot dial from softphone to sip enabled lync user or vice versa. howver i can call from any softphone to any other softphone in this test lab.

i checke some debug please if someone could give me some pointers about its resolution.
.169— is the freepbx box
226-- is lync server standard edition all roles collocated on it.

localhost*CLI>
Reliably Transmitting (no NAT) to 192.168.4.226:5060:
OPTIONS sip:192.168.4.226 SIP/2.0
Via: SIP/2.0/TCP 192.168.4.169:5060;branch=z9hG4bK5efed098
Max-Forwards: 70
From: “Unknown” sip:[email protected];tag=as170c4177
To: sip:192.168.4.226
Contact: sip:[email protected]:5060;transport=TCP
Call-ID: [email protected]:5060
CSeq: 102 OPTIONS
User-Agent: FPBX-13.0.192.9(13.12.1)
Date: Tue, 27 Jun 2017 11:58:37 GMT
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces, timer
Content-Length: 0


<— SIP read from TCP:192.168.4.226:5060 —>
SIP/2.0 200 OK
FROM: "Unknown"sip:[email protected];tag=as170c4177
TO: sip:192.168.4.226;tag=d6d3fde853
CSEQ: 102 OPTIONS
CALL-ID: [email protected]:5060
VIA: SIP/2.0/TCP 192.168.4.169:5060;branch=z9hG4bK5efed098
ACCEPT: application/sdp
CONTENT-LENGTH: 0
ACCEPT-ENCODING: gzip
ACCEPT-LANGUAGE: en
ALLOW: NOTIFY
ALLOW: BENOTIFY
SERVER: RTCC/4.0.0.0 MediationServer

<------------->
— (13 headers 0 lines) —
Really destroying SIP dialog ‘[email protected]:5060’ Method: OPTIONS
localhost*CLI>

any help ?
here are my settings in asterisk which i got from this site http://www.ucprimer.com/lync---asterisk-integration-guide.html
https://www.youtube.com/watch?v=KZk6j21AjEE
https://www.youtube.com/watch?v=FxZRt-VbfWo