What good is a 10/100/1000 port on the POE switch if the camera is 10/100?
What good is a 10/100/1000 port on the camera if the stream is < 90Mbps?
IPVM | IPVMU Certified | 06/02/16 04:05pm
The switch may be used in other applications e.g. connecting access points, or other devices with gig NICs.
The Axis P1428-E does, see excerpt of data sheet:
There certainly may be others. I've never done a thorough search for this as generally Gig is not needed for IP cameras (e.g., even the Avigilon 7K / 30MP camera uses 100Mb/s only).
Related, there is such a thing called Industrial GigE cameras, different space than video surveillance.
well the most i have ever had one camera was 120Mbs
but then again the camera was also functioning as a multi view web server as well with 4 other cameras streams mounted to the camera
but it was also a $1500 camera with special firmware
guess if you had money to throw at a custom job the cameras hardware would be able to handle it?
"What good is a 10/100/1000 port on the POE switch if the camera is 10/100?"
POE switches aren't just built for cameras. one would benefit from using a POE powered Gig Port when Connecting to a POE powered AP.
Gigabit sometimes brings unneeded complexity when dealing with PoE, as PoE via Injection, or Mode B uses the unused pairs. Gig uses all pairs, so there are no unused pairs. If you had a gig switch and a standard injector, it wouldn't work.
Now there are gigabit and 802.3at compatible injectors, but be aware for older equipment.
I was recently looking for an industrial PoE switch with gig copper uplinks and 10/100 PoE ports. Very hard to find. Most had gig on all, or were 10/100 on all.
I thought the answer was obvious on this but it has not been mentioned so maybe I am wrong:
A single 2-5MP camera might only need 2-10Mbps but let's say you have 20 cameras that each needs 6Mbps so the system needs 120Mbps. So the port from the switch to the NVR/VMS has to be gigabit and hence you will need a full gigabit switch (since not many switches have only 1 gigabit port and the rest are only ethernet).
Or am I missing something?
Most all IP cameras will never come close to 100 Mbps so a gigabit port isn't needed for the port that the camera is plugged into. The max we set our cameras to is 4 Mbps.
However, IMO, the switch should always have atleast 2 Gigabit uplink ports. One that is connected to the NVR and the other that is connected to the router. The reason those should be gigabit rated is because it takes all the combined traffic from all IP cameras and sends them through one port, and in this case, all the combined traffic could be more than 100 Mbps.
For small 4 channel systems, and probably even an 8 channel system, gigabit uplink ports probably arent needed, but its good to have them anyways.
However, IMO, the switch should always have atleast 2 Gigabit uplink ports. One that is connected to the NVR and the other that is connected to the router.
Why one connected to the router? Assuming a POE NVR, isn't it just as fast and twice as safe to connect the router to the LAN side of the NVR?
Okay, one thing nobody's mentioned yet is that all-gigabit switches tend to have a much stronger backplane (aka "fabric", aka switching capacity) than their 10/100 cousins.
- Cisco SF300-24P (24 10/100 802.11af ports, four GbE ports, two mini-GBIC slots) lists at 12.8Gbps switching capacity.
- Cisco SG300-28P (24 GbE 802.11af ports, four non-powered GbE ports, two mini-GBIC slots) lists 56Gbps.
If you're stacking a lot of high-traffic cameras and maybe running your NVR to iSCSI storage, you're going to come a lot closer to the maximum of what the FE switch can handle. Might never hit it, but personally, I'd rather have all that headroom.
From our usual local retailer, it's about a 50% premium for the SG model ($780, vs $530 for the SF version).