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*BLACK B } City of San Marcos Project: Conversion to IP telephones and single CS1000E the type and need of on -site support. Without the remote connection, support is limited to the availability of technical resources to be dispatched to site. Other tasks as specified in the installation schedule agreed to by both parties. Reuse of Customer Infrastructure The reuse of existing cable holds risk and every attempt will be made to reuse existing cable, any issues resulting from the existing cable will cause altered costs and time frames. This quote assumes that all station cables existing and /or installed by third parties meets (Category 3 for Analog /Digital Phones and Category 5E for IP Phones) EIA/TIA or higher standards and that all cables are labeled correctly as to identify them on the station and MDF ends, with cable records that detail that information by building and floor. End -User Training End user training is not included. Network The installation of Telco facilities always holds risk. Black Box Network Services will make every effort to insure a quick and accurate installation of these circuits. Neither the City of San Marcos nor Black Box Network Services have control over those companies supplying the circuits. Delays will cause altered costs and time frames. Customers who purchase IP Telephony products need to ensure that the LAN and WAN configurations are adequate to support IP Telephony communications throughout the network infrastructure. It is the customer's sole responsibility to make sure that the LAN and WAN infrastructure will meet and support IP Telephony specifications that provide acceptable VolP quality. Network reconfiguration and /or upgrades of the data network (including LAN/WAN hardware /software) are the responsibility of the customer. To successfully implement IP Telephony, the customer's data network must be able to support the demands of voice traffic concurrent with the data demands. Thus, a high performance network must be in place prior to IP Telephony equipment implementation in the customer's network. Without a successful high performance network infrastructure, an IP Telephony product may have undesirable performance. Customer network requirements include: • Separate VLAN for Voice over IP traffic • Dedicated Category 5 cabling and Layer 2 switch port per IP device (station) • Ethernet network 100MB minimum, no Token Ring • Adequate bandwidth to support your voice, data and video traffic volume demands over the network. Each VoIP call consumes approximately 80 Kbps of bandwidth using a G.711 CODEC. • Low Delay (Latency) to ensure a good quality voice conversation (less than 125 ms recommended) • Minimal Packet Loss (long term average less than or equal to 1% and short term not to exceed 5% in any 10- second interval are recommended) to ensure parts of a conversation are not distorted or lost especially during bursty data traffic flows. Page 16 of 18