Polycom SpectraLink 8030 - Manual (Page 105)

Diagnostic Tools
PN: 1725-36038-001_E.doc 105
the server does not send the error code message, then xxx is
defaulted to 000, i.e., EAP error code would be 5000. Refer [1])
http://www.ietf.org/rfc/rfc2759.txt section 6, [2]
http://ietfreport.isoc.org/all-ids/draft-zhou-emu-fast-gtc-02.txt
section 2
E A P E r r C n t x x x x x
L a s t E A P E r C o d e x x x x x