Tait TB9400 Installation And Operation Manual

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Tait TB9400 Installation And Operation Manual Manual pdf 97 page image

TB9400 Installation and Operation Manual Working with Base Stations from Your PC 97© Tait Limited March 20175.4.4 Configuring Single Base StationsMost base stations in non-simulcast trunked networks are single. Theyinterface to a site controller but not to other base stations. The followingexplains the special considerations when configuring single base stations.Channel GroupMembership Although single base stations are not actually part of a channel group, theirchannel configurations (Configure > Base Station > Channels) must stillselect a channel group (Configure > Channel Group > Channel Groups).Once a channel group has been selected, the following parameters need tobe configured.Channel Group IPAddress The selected channel group must be configured for single base stationoperation. Specify 127.0.0.1 as the channel group IP address. This is thebase station’s localhost address and stops it from attempting to send voicepackets to other base stations.Preamble Although the single base station’s transmitter does not receive voicepackets from other channel group members, it still receives them fromother base stations via trunking controllers. So, while most channel groupsettings have no effect, the preamble setting still applies and determineshow large the transmit buffer is.The default setting of 40ms is intended for internal jitter only. If the basestation is a traffic channel, you may have to increase the preamble. Voicearriving at the base station’s trunking interface has travelled from anotherbase station via the trunking site controller and could have significantlymore jitter.MarshallingDuration Although marshalling duration applies only to control channels, and has noeffect on traffic channels, we recommend that you configure themarshalling duration for each base station as described below. This willallow any base station to operate as a control channel when required.Configure the channel group settings to specify fixed marshalling andallow a duration of 40ms. This gives the control channel’s transmitter anappropriate buffer (control channels do not use the preamble to regulate thetransmit buffer).Trunking Interface Single base stations need a control connection to their site controller.A single base station interfaces to the site controller in the same way as themaster base station in a trunked channel group. Select Configure >Network Interfaces > Trunking to configure this.