Cisco used to be the best network vendor, they dominated the enterprise market. Now they have been overtaken by a variety of cheaper and better options. it was unreliable, I can only imagine an inexperienced person trying to set it up. Try Linksys Biz, Ubiquiti, or even a cheap 3-router mesh option and you'll be better off.
MikroTik RB941-2nD RouterBoard hAP Lite: Affordable 2.4GHz Home Access Point
71 Review
Mikrotik RouterBOARD 951Ui-2HnD RB951Ui-2HnD: High-Power 2.4Ghz Wireless AP with 5x10/100 Ports and OSL4
73 Review
Wi-Fi signal amplifier (repeater) TP-LINK TL-WA860RE, white
21 Review
MikroTik RBcAPGi-5acD2nD-US: High-performance Dual-Band 802.11ac Access Point
35 Review
π StarTech.com NETRS2321P: 1-Port RS232 to Ethernet IP Converter, Serial over IP Device Server - Black
5 Review
HB-UMLS Sabrent USB 2.0 Hub with 4 Ports and LED Power Switches for Each Port
12 Review
π USR-TCP232-410s: RS232/RS485 Serial to Ethernet Adapter/IP Device Server with DHCP/DNS Support
4 Review
π uni USB C Hub with Ethernet Adapter, 4K HDMI, Gigabit Ethernet, and 3 USB 3.0 Ports for MacBook Pro, iPad Pro, XPS
11 Review