abd8c530_Internal_Error_Codes___DocWiki__IEC_Field
[Field Definition] Indicates the network physical entity (hardware system) that generated the IEC. The value 1 is assigned to the gateway. [IEC Field] 
entity
v e r s i o n
e n t i t y
c a t e g o r y
s u b s y s t e m
e r r o r c o d e
d i a g n o s t i c c o d e
Cisco IOS Voice Troubleshooting and Monitoring -- Cisco VoIP Internal Error Codes - DocWiki