206072
IMA inverse multiplexing functionality requires some overhead ( ICP or IMA Control Protocol cells , typically one ICP cell in every IMA frame — commonly 128 cells in length — and in CTC or Common Transmit Clock mode , an ICP stuff cell must be inserted after every 2048 cells ) , and an IMA sublayer on the physical layer .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None