PowerDsine OEMs a huge majority of the units that are out there anyway (Axis for one).
I know Altronix has some new offerings that came out recently that I saw at ISC West that look pretty good, from a reputable manufacturer
Typically I use the Axis/PowerDsine 30 or 60W midspans located in a cabinet on the pole or nearby. You usually need a fiber media converter or a switch for pole mont cameras that aren't close to the building so you will need a cabinet and power anyways.
Axis also now offers premade cabinets with the PoE injectors.
L-Com also has some similar options.
Here in Central Florida, we also need the cabinet to put surge suppressors in. Lightning capital of the US...
IPVMU Certified | 06/10/13 09:29am
Why not use rugged PoE LAN switches? Smaller version has 4 ports (10/100/1000) PoE and some even have 2 SFP ports, all of which working temperature can accomodate the extremes? It cost a bit more than single PoE injector midspan like PowerDsine, but working temperature is pretty flexible.
Some Taiwanese brands (Lantech, Planet, Oring) with 4 ports are still acceptable in terms of price but it's within the rugged ratings. Even KBC networks nowadays are made in Nanjing, China.
I explored these brands in the upper limit only as we have to watch out for the high heat here in the tropics, most of them claiming can work up to 75 degrees Celcius. For the lower limit they claim -40 degree Celcius.
We have used the Ubiquiti ToughSwitch Pro inside a L-Com enclosure for our past installs. Works great for our needs. The switch has up to 150W total power, but a max of 18W per port. We haven't yet needed more power than that.