Hi
Is there any special poe requirements for this specific IP phones : Avaya E129
Because lately we're facing a problem that only this kind of IP phones is going down .
It doesn't matter to which kind of EX device it is connected , we've tried EX2200-48p and 24p and doesn't matter to which version.
Also we've tried to upgrade the poe controller but doesn't help : request system firmware upgrade poe fpc-slot 0
Also we tried to configure : set poe interface<> maximum-power 4 .. after some calculations :
http://rapidtables.com/calc/electric/watt-volt-amp-calculator.htm
as the vendor requirements : https://www.avaya.com/en/documents/e129-sip-deskphone---sme7492.pdf
it says class 1 poe ..
as cisco explinations , it is up to 4 watts : http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/book/power_over_ethernet.pdf << page 16-2
Any advise would be appreciated !