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32  NTU Optical Network Terminals 
 
Fig. 20—Architecture of the Device Configured for Triple Play  
Model 2 Services 
 
The difference between the models is the GEM4095 block, which is a logical terminal of the GEM port for 
broadcasting. It broadcasts traffic  downstream. Broadcast packets are  sent  from  the GEM4095 block to  WAN 
Connection Device and then are further transmitted to bri according to VLAN ID.