It's interesting to note that Intrado's recent 9-1-1 service outage was due to a hard-coded limit on the total number of calls that could pass through their sys

It's interesting to note that Intrado's recent 9-1-1 service outage was due to a hard-coded limit on the total number of calls that could pass through their system. Took them many hours to get the system back online after the limit was hit and further calls rejected. Though I suppose in real safety critical systems, you often review these limits and make sure they still apply.