RRD Graphs, Packet loss, loss of connectivity

[argint]

Dear All,

After 6 months of a nice quality leased line (6/6Mb) all of a sudden today we see the periodic serious packet loss resulting in loss of internet connectivity for all users. A couple of minutes later, it reconnects.

Ive attached the RRD graph that I captured. Were using 1.2.2 on a soekris board. Does anyone recognise this pattern?
Im relatively new to pfsense, but the lan seems fine while it happens, there is no other great indicators of why it would happen.

However, I do know that certain employees have been streaming internet radio all day whilst this happens.

Could that be in anyway related, or maybe its just the ISP?

Any thoughts welcome.

Many thanks for the great product.

UPDATE: Apologies, I didnt see this post already. Let me check the details and I will get back.
http://forum.pfsense.org/index.php/topic,8555.msg57621.html#msg57621

We have no servers tho, so i would doubt the connection. (All hosted services)

Could it be the streaming radio?