Tait TB7300 Installation And Operation Manual

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Tait TB7300 Installation And Operation Manual Manual pdf 56 page image

56 Installation TB7300 Installation and Operation Manual© Tait Limited November 20175.6.6 Ethernet ConnectionThe RJ-45 socket on the reciter’s rear panel provides the 10 BASE-T or100 BASE-T Ethernet connection to the other devices in the network. Usea Cat-5 cable to connect this socket to the Tait Network via a router orswitch.The Web UI allows you to set the Ethernet port speed auto-negotiation to10/100 Mbit/s or to negotiate a maximum 10 Mbit/s. Tait recommends thatyou keep the port speed at the factory default setting of 10 Mbit/s. Thereciter hardware and software are scaled to meet the performancerequirements of processing multiple voice streams along with supervisorycontrol and management communications. 10 Mbit/s is ample for thoserequirements. The 10/100 Mbit/s setting is provided for compatibilityreasons, but it is possible under high traffic conditions at 100 Mbit/s fortraffic arriving at the reciter at the full rate within a small timing windowto overflow internal buffers and therefore suffer packet loss. If you set theport speed to 100 Mbit/s and observe QoS lost packet alarms, then reviewyour Ethernet port speed settings.With the port speed at 10 Mbit/s it is particularly important to set the voiceQoS on the reciter port of your site router or switch to a strict priority queuepolicy - which is the same policy that you should also be setting for yoursite link ports. The default QoS settings restrict the voice bandwidth to 1/25th of the port speed which is smaller than the required bandwidth fortypical systems at 10 Mbit/s.If necessary, refer to “Ethernet Connector” on page 60 for a list of Ethernetconnection pin allocations.