System Support Technology Business Phone Service

 MIKROTIK-HAP-AC2 - Router

This is used for Paging through the Phones, Hearing the Phones ring, i warehouses, ect

Pep Wave Wireless Back Up Unit
For Redundancy and Security

Wireless Wi-Fi to go from 1 through the next

Door Phones are common for access control. 

Moving a customer's LAN network to a new ISP WAN Network

Here are some Basic Troubleshooting Techniques Geared for these Installs

Standards and Procedures of Running Data Drops

Networks and Topology

QWN 7630 Access Point