Broadband QoS Performance For Q4 2001

1. Network availability is the measure of the degree to which the access network is operable and not in a state of failure or outage at any point of time. That is, it measures the total downtime of the network, including the ATM switches, multiplexers, routers, e-mail facilities (if provided) and connection to 1-NET and Internet backbone over a month. All scheduled downtime for the purposes of maintenance and upgrading of the network system will be excluded from the calculation. However, all access network operators must keep their users informed of such maintenance times.

Network availability = (Total operational minutes - Total minutes of service downtime) x 100%
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Total operational minutes



2. Figures are rounded up to 2 decimal places.