Steen said in the process of upgrading, problems are inevitable.
"To run a network there are always things that work and things that don't work," he said.
Steen said yesterday that while reverting to the old core switch software is not an immediate setback, HASCS will eventually try to install the new version again.
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"For the time being, it's not a problem," he said. "There's no question we can't run that forever. Sooner or later we'll have to upgrade."
In the meantime, Steen said HASCS is trying to avoid further disruptions to network availability.
"We apologize for it and ask for patience," he said of yesterday's outage.