Big family. All our respective homes are inside the same compound; my own family, my siblings (with their own respective families) and our retired parents. We all share internet access and a single landline.
The IP phones serves as an intercom as well as a way to share the outside line by first dialing "9". It's easier to use an IP phone as everyone is already connected to my network (albeit, on different VLANs), rather than running a traditional PBX in which I would have to use dedicated analog lines for each phone to each house!
Prior to this, many years ago, I used Motorola DECT cordless phones. The system allowed me to integrate multiple cordless phones and have them work like a PBX. It was ok... when it worked. The problem I had was bad reception as you're only allowed to setup a single base unit as the Master. All cordless phones talks to the Master base only. Not ideal, so that's when I thought of running an IP phone system.
Got 7 IP phones with 6 currently active:
2 x Cisco SPA525G (WiFi)
5 x Cisco SPA504G (wired LAN)
The back end is a Cisco 2621XM Multiservice Router running Cisco CallManager Express. It's essentially the PBX and that's all it does.
As it's quite obvious by now, I'm the designated IT guy maintaining our home servers (Plex media server, DHCP/DNS), network (UTM, wired and wireless), voice (IP phones, PBX), and everything in between (UPS, cabling, IoT, smart home devices, etc.) We typically share on some of the investments and I try to buy pre-owned items as much as I can to reduce cost.
If you want to see more of what I do, check out this thread: Anyone into home automation/smart homes with integration to Alexa, Google Home, Siri, etc.?




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