User's Manual

Table Of Contents

DRAFT 4

TB9400 Installation and Operation Manual Working with Base Stations from Your PC 59

4.4.4 Working with Configuration Files

At any time, you can save the current configuration settings as a file

(Tools > Tools > Configurations). This is stored in the base station, but you

can download it and store it on your computer as an off-site backup. The

base station identity and network identity are not saved as part of the

configuration file.

You may want to develop a master configuration and upload it to all base

stations in the network, The master configuration can contain all the

different channel configurations and can be common to all base stations. The

base station identity selects the default channel.

4.4.5 Configuring Single Base Stations

Most base stations in non-simulcast trunked networks are single. They

interface to a site controller but not to other base stations. The following

explains the special considerations when configuring single base stations.

Channel Group

Membership

Although single base stations are not actually part of a channel group, their

channel configurations (Configure > Base Station > Channels) must still

select a channel group (Configure > Channel Group > Channel Groups).

Channel Group IP

Address

The selected channel group must be configured for single base station

operation. Specify 127.0.0.1 as the channel group IP address. This stops the

base station from attempting to send voice packets to other base stations.

Preamble Although the single base station’s transmitter does not receive voice packets

from other channel group members, it still receives them from other base

stations via trunking controllers. So, while most channel group settings have

no effect, the preamble setting still applies and determines how large the

transmit buffer is.

The default setting of 40 ms is intended for internal jitter only. If the base

station is a traffic channel, you may have to increase the preamble. Voice

arriving at the base station’s trunking interface has travelled from another

base station via the trunking site controller and could have significantly more

jitter.

Marshalling

Duration

If the base station is a control channel, the channel group settings should

specify fixed marshalling and allow a duration of 40 ms. This gives the

control channel’s transmitter an appropriate buffer (control channels do not

use the preamble to regulate the transmit buffer). Marshalling duration does

not apply to traffic channels.

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 the