This explains much.

[serinde]

From: Covad's NOC Address
To: Us
Subject: RESTORATION - DSL Outage, TT# Blah

Outage Description:
DSLAM failure at the NYCMNY56-SL3 Central Office, in New York, NY has been resolved.

Reason for Outage:
DSLAM Utilization

Or, "It broke because we used it."