We have 2821 router in the company that moves the traffic (data/voice) between the US and Europe via two T1's. We have QoS configured that gives priority to the Voice over the data on both T1's that we have. The board Installed on the router is vwic2-2mft t1/e1. When I issue sh int sum I see a lot of packets dropped from the outgoing queue (under OQD). When I issue sh int serial x/x/x:x I see the same number of packet dropped in "Total output drops" row. My questions are: Is QoS responsable for these dropped packets or the buffer of the outgoing queue is very small and can't take all the packets sent?? Can a call(voip phone call) be dropped caused by these packets. Are these droppes problem at all?
Can these packets affect the quality of all the calls trought the T1's??
Thank you in advance!!