A spokesperson for Macquarie said the outage lasted from 80-100 minutes from about midday and impacted only a small proportion of its customer base -- Sydney-based frame relay customers or those whose service operated via a Sydney link.
The spokesperson said Macquarie was now undertaking root cause analysis of the problem and would compensate customers as per their service level agreements.
The incident occurred despite the Macquarie network having full redundancy, she said.
One Macquarie customer said the incident hampered productivity, with office workers sitting around doing nothing. He said he struggled to get through to Macquarie's call centre during the outage, with calls being met with a busy signal.