Mike A.
Known around here
- May 6, 2017
- 4,199
- 7,066
Naaaa... Back in the old days maybe. Now everything works with normal cable.
Ethernet, POE, Gigabit Switch, Which One Do I Need?
- Thread starter savatreatabvr
- Start date
Naaaa... Back in the old days maybe. Now everything works with normal cable.
+1^^ to @Mike A. words above.
Back before Auto MDI/MDI-X ports on switches and PC LAN ports became common, you did need a cross-over cable for certain situations, like PC to IP camera or PC to PC, now that's no longer a requirement with modern networking devices. That being said, you could use a cross-over cable PC to PC and if both are Auto MDI/MDI-X ports then it would work anyway (but it's not necessary).
Ha! I thought they were still required also... just googled to see when that might have changed:
Automatic crossover
Introduced in 1998, this made the distinction between uplink and normal ports and manual selector switches on older hubs and switches obsolete. If one or both of two connected devices has the automatic MDI/MDI-X configuration feature, there is no need for crossover cables.
Guess I haven't kept up with new networking technology
Well see, this is exactly why this forum rocks. Not so technical people like myself can get technical questions answered by honest members. I was a Special Systems tech (commercial, security, fire, access control, CCTV & life safety systems installation) for ATT Integrated Technologies, Honeywell and sub contracted at Intel for Orion Security Specialist but 20 years later a simple ethernet cable question stumped me. Hold on, to save myself from being persecuted by simple common industry standards, like I said it was 20 years ago when I was a SST, lol. Back when crossover cables were commonly used.
And null modem cables for RS-232.
And null modem cables for RS-232.
2 to 3, 3 to 2, 5 straight through, and a software handshake!
Yep on a DB-9 with 5 as ground; on a DB-25, IIRC, pin 7 was ground. If I'm wrong, gimme a break...probably was 1990 the last time I used those.
You know... I googled before I wrote that to make sure ground was pin 7... was a bit surprised it was pin 5... did not realize I was looking at a pinout for the DB-9 connector... I had always worked with the DB-25 and you are right 1990 was probably when they went out of style... along with the last of the DEC VT-100's
Flintstone61
Known around here
Don't forget to check for conflicting IRQ's when you add that DB-9 Serial device!
Flintstone61
Known around here
Even TX & RX were swapped between the DB-9 and the DB-25 but it didn't matter because it was 2 to 3 and 3 to 2 on BOTH 9's and 25's for a null modem cable.
Even TX & RX were swapped between the DB-9 and the DB-25 but it didn't matter because it was 2 to 3 and 3 to 2 on BOTH 9's and 25's for a null modem cable.
So, when I hooked them up using DB-9s not knowing that, I got away with it!
Yeah, never knew why someone did that, maybe got DCE mixed up with DTE or came up with it on a Monday!
I plugged the ethernet cable into port 8 of the POE switch, link below, and the other end of the cable into the router, still no video. What am I missing here?
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Now you have to go into the NVR and manually enter each camera - the NVR will only "auto populate" the cameras connected to the NVR POE ports.
Any cameras coming into the NVR via the WAN/LAN port need to be manually entered.
Any cameras coming into the NVR via the WAN/LAN port need to be manually entered.
I still use DB9 serial cables - null and regular. A lot of equipment is hooked into automation systems via a serial plug. Obviously it is becoming less common now because everything is communicating over IP, but I still have probably a half dozen devices that use serial connections for communication. Once it is set up, it is extremely stable.
Both of my cheap cable testers told me the cable running to the router from the POE switch was open or the cable length was to long but the continuity test on both testers said the cable was good. The specs on the cheap testers say they accurately read up to 360' but the cable run isn't more that 200' so yeah you can say I have no hair left. But come to find out, the rj45 connectors I was using, links below, are basically junk so I found some other connectors that are easier the use and fit in the sockets better, last link.
Now all 16 cameras are up and working perfectly! I guess the moral of this story is if you want good results from the very beginning, simply buy expensive test equipment and materials and toss your cheap stuff in the trash. Don't bother giving them away, they'll just cause headaches for the people you give them too so toss them out! Thank you to the members who helped me by sharing their knowledge and time. Wait, I'm not done asking question yet, stay tuned, lol! Thanks again.
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versitron
n3wb
To help you make an informed decision for your 16-channel NVR system, let's break down the differences between Ethernet, PoE, and Gigabit switches and understand which one fits your requirements.
Your specific requirements:
Recommended Setup:
This setup will simplify your installation process while meeting both your power and data needs effectively.
- Ethernet Switch: An Ethernet switch is a basic network switch that allows multiple devices to connect and communicate within a local area network (LAN). It does not provide power over Ethernet (PoE) or support high-speed data transfer like a Gigabit switch.
- Gigabit Switch: A Gigabit switch supports data transfer speeds of up to 1,000 Mbps (1 Gbps), which is significantly faster than standard Ethernet switches (usually 100 Mbps). Gigabit switch handles high data throughput, which is beneficial for a large number of devices or high-bandwidth applications. It ensures smoother video streaming and faster data transfer.
- PoE (Power over Ethernet) Switch: A PoE switch not only allows for data transfer but also supplies power to devices through the same Ethernet cable. This is particularly useful for devices like IP cameras, which require both data connectivity and power. PoE switch reduces the need for separate power supplies for each device. It simplifies installation, especially for IP cameras and access points.
Your specific requirements:
- You need to connect 8 cameras, but the conduit can only accommodate fewer cables.
- You want to minimize the number of cables without compromising data and power needs.
- PoE Gigabit Switch: Use a 4-port PoE Gigabit switch. This will allow you to connect 4 cameras to the switch, and then you can run a single uplink cable from the switch to your NVR. The PoE switch will supply both data and power to your cameras.
- Running Cables: With a PoE switch, you'll only need to run 5 cables through the conduit (4 camera cables + 1 uplink cable to the NVR).
Recommended Setup:
- PoE Gigabit Switch: This combines the benefits of high-speed data transfer and PoE, ensuring your cameras get both power and data through a single cable. Example: A 4-port PoE Gigabit switch like the TP-Link TL-SG1005P or similar.
- Camera Connections: Connect 4 cameras to the PoE switch.
- Uplink Cable: Run one Ethernet cable from the PoE switch to the NVR.
- Use a PoE Gigabit Switch: This will reduce the number of cables (4 camera cables + 1 uplink cable) and provide power to your cameras.
- Ensure High-Speed Data Transfer: The Gigabit capability ensures smooth video streaming and data handling for your NVR system.
This setup will simplify your installation process while meeting both your power and data needs effectively.
From that drawing since you already have power on the other side for the gigabit switch, all you need is a single direct burial ethernet cable in the pipe to connect the switch to the NVR on the other side of the driveway. You could have even just tied all cameras 1-8 to the switch but if they are already run then obviously just leave them.
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