FAQ
TL;DR: Wondering how to split one RJ45 into two devices? âYou need to buy a switch.â Pick 1 Gbps if internet >100 Mbps. [Elektroda, Andrzej Ch., #18642772]
Why it matters: For UPC cable users wiring multiple rooms, this avoids bottlenecks and speed loss from passive splitters.
Quick Facts
- If your internet plan is >100 Mbps, choose a 1 Gbps switch to avoid bottlenecks. [Elektroda, Andrzej Ch., #18642772]
- Match switch speed to service: 100 or 1000 Mbps are typical options. [Elektroda, Andrzej Ch., #18642824]
- Router-to-switch cable can go into any LAN port; no uplink required. [Elektroda, Andrzej Ch., #18642802]
- Use Ethernet twisted-pair; modern switches auto-detect crossover vs straight (AutoâMDI/MDIâX). [Elektroda, Andrzej Ch., #18642786]
- Metal housing dissipates heat better, reducing cooling issues in tight spaces. [Elektroda, Andrzej Ch., #18642824]
How do I connect two devices in another room when only one RJ45 is available?
Use an unmanaged Ethernet switch. It acts transparently, so no setup. Follow these steps:
- Power the switch.
- Run a twistedâpair Ethernet cable from the routerâs LAN to the switch.
- Plug each device into the switchâs LAN ports and test connectivity.
Modern switches auto-detect cable type. That single room feed now serves multiple devices. [Elektroda, Andrzej Ch., #18642786]
Do I need to configure the switch?
No. Use a nonâconfigurable (unmanaged) switch. It is transparent to your network. âBuy a non-configurable switch, then it is âtransparentâ in the network.â Just plug it in and connect devices. The router will continue assigning addresses as before. [Elektroda, Andrzej Ch., #18642786]
Which port on my switch should the router cable use?
Use any LAN port. For a TPâLink TLâSG105, plug it into any slot. Devices on other ports will connect through the switch automatically. [Elektroda, Andrzej Ch., #18642802]
Can I split the Ethernet cable into two RJ45 jacks without a switch?
Avoid passive pair-splitting. It limits speed. Use a small switch instead to preserve throughput. That avoids the slowdown you noted. A switch gives each device a proper Ethernet link. [Elektroda, radassz, post #18642766]
Fast Ethernet vs Gigabit: which should I buy for an internet plan over 100 Mbps?
Match your switch to your plan: 100 or 1000 Mbps. For plans over 100 Mbps, pick Gigabit. For 100 Mbps plans, Fast Ethernet suffices. Keep switch speed aligned with your service to avoid bottlenecks. [Elektroda, Andrzej Ch., #18642824]
How many devices can I connect to a switch?
As many as it has ports. Four, eight, and more are common. Every occupied port serves one device. Choose a size that fits your current and future devices. Extra ports give room to grow. [Elektroda, Kozakowski, post #18642774]
What cable should I run between the router and the switch?
Use Ethernet twistedâpair cable. Keep power cables separate. This is the required medium for RJ45 networking. [Elektroda, Kozakowski, post #18642789]
Do I need crossover cables, or will the switch handle it?
You do not need crossover cables. Modern switches autoâdetect crossover versus straightâthrough. The feature is often called AutoâMDI/MDIâX. Use regular patch cords from your router to the switch. The switch will adapt automatically. [Elektroda, Andrzej Ch., #18642786]
Which brand or model do forum users recommend for this use?
Netgear GSâ105 or GSâ108 are recommended alternatives. They include a lifetime warranty. Many users choose them for reliability. That warranty adds peace of mind for alwaysâon networking. [Elektroda, sebap, post #18643822]
From FS105v3, GS105v5, FS305, or FS205, which should I pick?
Pick the GS105v5. âThis one without thinking - has 1Gb ports.â It supports Gigabit for higherâspeed plans. [Elektroda, KOCUREK1970, post #18646517]
Do I need a dedicated uplink port on the switch?
No. A dedicated uplink is not required on these small unmanaged switches. If there is no marked uplink, any port works for the router feed. Link LEDs will confirm connectivity. [Elektroda, Kozakowski, post #18642800]
Is a metalâhousing switch worth it for heat management?
Yes. A metal housing dissipates heat better. That reduces issues from poor cooling. Choose metal if the switch will sit in a warm or enclosed spot. It improves longâterm reliability. [Elektroda, Andrzej Ch., #18642824]
Is DâLink a good choice too?
Yes. DâLink unmanaged switches are a good home choice. Ensure the model meets your speed needs. Select Gigabit if your plan is above 100 Mbps. That prevents a speed bottleneck. [Elektroda, Andrzej Ch., #18642772]
Which has better service, Netgear or TPâLink?
Forum feedback favors Netgear service. âService matters in Netgear are a pleasure, in TPLink the road through agony.â Consider that if support experience matters to you. [Elektroda, KOCUREK1970, post #18644889]
