Welcome to our forum, interrupted connection in a game can be a real pain, so sorry you are suffering it, we will try to help.
The connection is looking good from here, modem online, no errors, area historical data nice and stable.
Is it only Black Ops affected or other devices on the connection? Is the Black Ops device wired or wireless? We would always recommend wired for gaming stability.
Mmm another thought have you done any port forwarding Port Forwarding Guides for Call of Duty - Black Ops we have a hub guide here Setting up port forwarding and port triggering on my Virgin Media router
Please let us know how it goes.