Help: ICE_PACKETS

As network interfaces play an increasing role in data distribution, software 
and hardware must be extended to process data packets.  Three forms of packets 
are currently handled by the ICE hardware/software: 

1) ICE Packet format 	- 64by header, fixed or variable length data
2) SDDS Packet format 	- 56by header, fixed 1024by data
3) VRT Packet format 	- 32by header, fixed 1440by data
4) RMIF Packet protocol	- 8by header, variable data

Normally, the packet headers precede the packet data they describe.  They may
also be placed in separate streams.  The packet header formats are as follows:

  ICE - ICE Packet Header (Little/Big Endian):
  VRT - VITA-49 Radio Transport Packet Header (Big Endian)
  SDDS - SDDS Packet Header Modified (Big Endian):
  RMIF - RMIF Packet Header (Endian independent):
  NETWORK - Network interface notes