How to organize a network for a workshop?

Question

Network administration

Good afternoon!
Interested in solutions to this problem.
I would be grateful for tips and a sober look at things.
There is an enterprise 27 km from the head office.
Previously, this building was rented out, at the moment the company is expanding and moving new production there.
From the previous "owners" there were wires and so on.
The current picture is as follows.
Internet comes into the building via Ubiquiti Carrier POE Adapter
With output and conversion to Lan
1) Next comes the unmanaged switch DES-1005A
Port 1 - lan ------ 1 port asus GigaX 1005
Port 2 - lan input with POE adapter
Port 3 - lan ------ 1 port Hanlong Unicorn (1)
Port 4 - lan ------ 1 port Hanlong Unicorn (2)
Port 5 - empty
2)Next Switch asus GigaX 1005
Port 1 - lan ------ 1 port DES-1005A
Port 2 - empty
Port 3 - lan ------ Computer 1 (connected)
Port 4 - lan - ----- computer 2 (not connected)
Port 5 - empty
3) Next Hanlong Unicorn VoIP telephony adapter (1)
Port 1 - lan ------ 3 port DES-1005A
Port 2 - empty
Port 3 - RJ-11 ------- telephone (works only through speakerphone)
Port 4
4) Further Hanlong Unicorn VoIP telephony adapter (2)
Port 1 - lan ------ 4 port DES-1005A
Port 2 - empty
Port 3 - RJ-11 ------- phone is not connected
Port 4
Everything is also shown in this figure.

Either photo
It is necessary to conduct a network and set up 6 jobs

. In the future, it is planned to connect ip-video surveillance.
At the moment, the idea is only one

Mikrotik rb951g-2hnd + switch for 6 computers + voip gateway for 3-4 phones.
I would be happy to hear suggestions on this.
Thank you.

Answer 1

voip gateway is needed only for regular phones + fax machine,
it is better to take a switch for 24 ports at least, phones are also in the switch, there will be ip
phones already very good
mikrotik yes.