13.3.2  

QoS in the Router 
 
 •   QoS functions control router priorities and timing.
 •   Router queues are optimized for routing and are not suitable for QoS monitoring of voice transmission
 •   Fragmentation (if used) takes time and thereby increases the risk of packet loss
 •   Time-controlled hierarchical policies not available
 •   No feedback due to insufficient monitoring
 •   Architecture not suitable for specialized VoIP control functions