06-10-13 Regular Meeting of La Porte City Council

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® OPT-E-MANService As noted in the above formula, all ports included in a customer’s network are utilized in calculating Network Availability. The customer is responsible for (1) notifying AT&Twithin 45 days after the end of the month when the service parameter within the calendar month falls below the committed level, and (2) requesting a service credit. Upon verification by AT&Tthat the actual service performance for that parameter was less than the committed level, the customer will beprovided a service credit equal to 10% of the monthly recurring charge for all affected ports. 3.Measurement Definitions for Grades of Service Service configurations include a choice of one of two underlying Grades of Servicewhich have SLAs associated with them: Bronze and Silver. Each Grade of Service offers a different level of service performance. The following describes the service parameters for each Grade of Service. Packet Delivery Rate(PDR) Packet Delivery Rate (PDR) is a measurement of the actual amount of useful and non- redundant information that is transmitted or processed from end-to-end across the network. It is a function of bandwidth, error performance, congestion and other factors. PDR is expressed as a percentage of Ethernet frames offered to the network that successfully traverse the network, end-to-end, within the CIR, and within a calendar month. PDR is calculated as the total number of effective Ethernet frames, per port, that successfully traverse the network divided by the total number of effective Ethernet frames, per port, offered to the network within a calendar month. Those frames that violate the maximum range will be excluded from the calculation. PDR is measured by averaging sample measurements taken during a calendar monthfrom network terminating equipment to network terminating equipment to which the customer ports are attached when the OPT-E- MAN network is available. Latency Latency is the amount of time necessary for a typical frame to traverse the network. Latency is calculated as the measurement of time taken for a customer frame to go from one end of the network (origination point) to the other end (termination point). The measurement will consist of measuring the time it takes to “ping” or travel from the origination to termination ports for the connection in question. Latency is measured by averaging sample measurements taken during a calendar monthbetween network ® terminating equipment to which the customer ports are attached when the OPT-E-MAN network is available. Jitter Jitter is the delay that occurs between 2 packets or Ethernet frames that are traversing the network. Jitter is calculated as the delay variance of the packets transported across the network or the delta of delay between two consecutive packets. It is measured between two endpoints, and will consist of measuring the time between a set of packets. Jitter is measured by averaging sample measurements taken during a calendar monthbetween All parameters of this document and network performance are subject to limitations described in section 1. © 2010AT&T Intellectual Property. All rights reserved. AT&T,the AT&T logo and AT&T product names are trademarks of AT&T Intellectual Propertyand/or its affiliates. Page 2of 5