NEC Univerge SV8500 Operation And Maintenance Manual page 587

About System Message "33-S" Outputted From Internal PHI
(1) FNC=05H, INF=04H, FLT=02H (Command re-send error) is outputted.
Fault reason
• Communication is not available.
<<This System Message will be output when control packet send timer timeout has occurred eight times
continuously or when any communication fault was detected while sending the control packet.>>Fall out
of the Ether cable or faulty cable between circuit card and HUB may be the reason.
Hardware failure or network interference may be the reason
(a) Confirm the operation of MG (Media Gateway).
(b) Confirm each network equipment, connection and configuration when this fault occurs frequently.
CHAPTER 4
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Fault Repair Procedures