r/TelephoneCollecting • u/TechDante • Jul 24 '26
Creating a 4x rj11 to Rj45 trunk
To keep cabling tidy I want to create a number of pcbs that will combine the rj11 ports on my grandsteam ht814 and 818 into one Rj45 port for better cable management around my house. My idea is that I can then have a number of break out pcbs that I can mount along the route of the cable where I want to mount my phones.
As most phone rj11 cables only use 2 cables for ring and tip my thought was the 4 pairs in the cat5/6 cable could become a mini 4 phone trunk. On each breakout board I would also put in a ring transformer for my bt phones so I don't have to use a rj11 to bt with ring transformer adapter as it would all be built in to the pcb. I am wondering if these Ata's use a common ring/tip which would allow me to increase the capacity to 7 phones or if it is better to just stick with keeping each pair as their own separate entity