Tait International Limited TBCK4A Benutzerhandbuch
68
Working with Base Stations from Your PC
TB9400 Installation and Operation Manual
© Tait Limited March 2015
The default setting of 40ms 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.
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
Although marshalling duration applies only to control channels, and has no
effect on traffic channels, we recommend that you configure the
marshalling duration for each base station as described below. This will
allow any base station to operate as a control channel when required.
effect on traffic channels, we recommend that you configure the
marshalling duration for each base station as described below. This will
allow any base station to operate as a control channel when required.
Configure the channel group settings to specify fixed marshalling and
allow a duration of 40ms. This gives the control channel’s transmitter an
appropriate buffer (control channels do not use the preamble to regulate the
transmit buffer).
allow a duration of 40ms. This gives the control channel’s transmitter an
appropriate buffer (control channels do not use the preamble to regulate the
transmit 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 the
master base station in a trunked channel group. Select Configure >
Network Interfaces > Trunking to configure this.
single base station interfaces to the site controller in the same way as the
master base station in a trunked channel group. Select Configure >
Network Interfaces > Trunking to configure this.
4.4.6
Configuring Base Stations in a Channel Group
You can configure the way the base station behaves in its channel group.
Also, qualified network engineers can change DSCP assignments, so that
routers and switches provide a different quality of service to different types
of IP packets. For more information on designing and configuring
simulcast channel groups, refer to TN-1514 (P25 Phase 1) or TN-2341
(P25 Phase 2).
Also, qualified network engineers can change DSCP assignments, so that
routers and switches provide a different quality of service to different types
of IP packets. For more information on designing and configuring
simulcast channel groups, refer to TN-1514 (P25 Phase 1) or TN-2341
(P25 Phase 2).
In trunked networks, many base stations are single and not actually part of
a channel group. However, they still must be assigned to a channel group
configuration and some of its parameters must be set correctly.
a channel group. However, they still must be assigned to a channel group
configuration and some of its parameters must be set correctly.
4.4.7
Setting Up Custom Alarms
Each of the base station’s 12 digital inputs can be used to raise a custom
alarm when the input goes high or low. The Custom Alarms form
(Configure > Alarms > Custom Alarms) allows you to assign a name to
each custom alarm, and to configure whether the alarm is triggered when
the digital input goes high or low. Custom alarms are reported via the web
interface and SNMP traps.
alarm when the input goes high or low. The Custom Alarms form
(Configure > Alarms > Custom Alarms) allows you to assign a name to
each custom alarm, and to configure whether the alarm is triggered when
the digital input goes high or low. Custom alarms are reported via the web
interface and SNMP traps.
Custom alarms are used to provide an alarm when an external event
activates a digital input. You can rename any of the available alarms to
provide a more meaningful name, such as “Door open”.
activates a digital input. You can rename any of the available alarms to
provide a more meaningful name, such as “Door open”.