We suspect there has been a device outage on GTTs end, as traffic is no longer flowing via Telehouse North. The 2-3 minute outage experienced can be put down to any traffic flowing via THN to GTT being cut off in a non-graceful state, as well as BGP hold-timers expiring and route reconvergence. We'll be monitoring for the next 24 hours, and will post any further updates here.