Installation and Operation Manual

Table Of Contents

66 Installation TB7300 Installation and Operation Manual

5.7.6 Ethernet Connection

The RJ-45 socket on the reciter’s rear panel provides the 10 BASE-T or

100 BASE-T Ethernet connection to the other devices in the network. Use

a Cat-5 cable to connect this socket to the Tait Network via a router or

switch.

The Web UI allows you to set the Ethernet port speed auto-negotiation to

10/100 Mbit/s or to negotiate a maximum 10 Mbit/s. Tait recommends that

you keep the port speed at the factory default setting of 10 Mbit/s. The

reciter hardware and software are scaled to meet the performance

requirements of processing multiple voice streams along with supervisory

control and management communications. 10 Mbit/s is ample for those

requirements. The 10/100 Mbit/s setting is provided for compatibility

reasons, but it is possible under high traffic conditions at 100 Mbit/s for

traffic arriving at the reciter at the full rate within a small timing window

to overflow internal buffers and therefore suffer packet loss. If you set the

port speed to 100 Mbit/s and observe QoS lost packet alarms, then review

your Ethernet port speed settings.

With the port speed at 10 Mbit/s it is particularly important to set the voice

QoS on the reciter port of your site router or switch to a strict priority queue

policy - which is the same policy that you should also be setting for your

site link ports. The default QoS settings restrict the voice bandwidth to 1/

25th of the port speed which is smaller than the required bandwidth for

typical systems at 10 Mbit/s.

If necessary, refer to “Ethernet Connector” on page 71 for a list of Ethernet

connection pin allocations.