Blair, it might be a good idea to allow for 48 v powering, since that is
802.3af POE standard. This way your device could be mounted away from
the Radio if one so chose to.
John
Blair Davis wrote:
Well, I guess there is no reasonably priced unit out there that will
do what I need and fit in the space allowed.
The comments on the list have shown me that there may be a demand for
a unit like this. I have decided to build my own. I have also
decided to make it available to others who might need it.
As part of this process, I am posting the planned specs and I am
asking for additional ideas for features.
Specs:
Hardware
10baseT ethernet port for communication.
1-4 pair of RJ-45 pass thru jacks with lines 4 and 5 switched.
Each pass thru jack pair is independently switched
Relay(s) rated for up to 48VDC at 3A
Power available monitor for switched jack(s)
Unit powered via 5-12VDC
Software
Setup and controlled via web browser or telnet
Static IP with subnet and gateway
Programmable ping monitor for each relay
Selectable 'keep alive' / 'I am here' ping
Adjustable power off delay
Adjustable power off time
Several things I am undecided about adding are:
Email notification of ping failure
Email notification of power available status change
Programmable, repeatable by time and date switching
(this requires a real time clock and/or automatic synchronization
with a time server and might increase the costs)
One thing I will not add:
Switching 110/220AC. This would add many requirements for testing and
considerable legal liability.
The price should be under $100 each.
Questions?
Comments?
Interest?
--
Blair Davis
West Michigan Wireless ISP
269-686-8648
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