I'm looking for the out-of-band console server which I can dial-in when the network is down. What kind of OOB console server are you guys using? I heard of CDI (Communication Devices Inc). Is this good?
Sometimes changing the port to software mode seems to work - I had similar issues with opengear and 2960X switches still I came across this - not sure if WTI have the same.
The most famous were always Shiva and Nortel/Bay Networks. The world is full of those. They are everywhere, still running. Even though both of those manufacturers are gone.
3Com, IBM, Perle also had some.
WTI seems to still be in business. Incredible.
I mostly see their PDU products around, I suspect they originally did that RAS (remote access server) product to support their serial connected PDUs.
Lots of WTI's PDUs have Ethernet right on them. But you can get a lot of density in 1U with a big multiport RAS.
WTI makes a variety of out-of-band console servers, including some with both ethernet and a built-in modem for dial-up. Also has FIPS module if you're in to that. There is a reason why WTI is still in business.
I think it all depends on what you need.
do you need 1 device to be able to be remotely controlled ?
then a us robotics modem I believe is the "standard" out of band device to speak of.
if you need many devices then you can choose an old router that you add alot of serial interfaces to.
a computer with usb serial ports there are many different models of usb- serial converters 1-16 ports
and you can have several of the converters.
a network device, ethernet - Serial converters.
Digi does loads of them.
and well OOB is OOB so there are some nice GSM modem solutions if you realy need OOB.
maestro heritage is one of the many that are at your disposal.
but beware of the security issiues when designing a OOB solution.