Motorola MOTOTRBO SYSTEM PLANNER Specifications Page 143

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134 System Components and Topologies
November, 2008
Application Server interfaces with the wide area channels in the same way as it interfaces with the
local area channels. This is described in section 3.2.2.1.3 “Server Based Data Applications in
Repeater Mode”.
3.2.3.1.2 Wide and Local Area Systems with Distributed Data Application
Servers
It is possible that one of the logical wide area channels of the repeaters is configured for local
communication only. In this case, each site has its own logical channel for local communication.
This is useful in case a customer need a significant load of local communication. This configuration
offloads the local communication from the wide area channel.
The following figure shows an example of such configuration in which one of the logical channels
(say, slot 2) is used in IP Site Connect mode (wide area) and the other (slot 1) is used in digital
repeater mode (local area). The calls originating on slot 1 are not sent to other repeaters. A
customer should use slot 1 for local groups (i.e. groups whose members are expected to be
present in the coverage area of the repeater); and slot 2 for groups whose members are
distributed over the coverage area of multiple repeaters.
The data messages sent over local channel 1 are not delivered to the Application Server 1 and
therefore, if required, each geographical location should have their own Application Server with
their own Presence Notifier. When a radio manually roams (i.e. changes dial positions) between a
local area channel and a wide area channel, the radio registers with its respective Presence
Notifier. To facilitate this, the radio ID of the control stations should be configured to be the same.
If a customer requires more local capacity at a location then it is possible to add more repeaters
working in Single-Site configuration and all the local slots of all the repeaters can share the same
Application Server. In that case, the radios on the local channel will not be able to communicate
with the wide area channels’ Application Server.
Figure 3-30 Wide and Local Area System with Distributed Data Application Servers
WAC1
MOTOTRBO
Digital Repeater
RX = f
1
TX = f
2
MOTOTRBO
Contr ol Station
(digital mode )
Text Message
Server
Presence Notifier
Mu lti-Channel Device Drive r
(MCDD)
Text Message
Dispatch
Location Server
Location
Dispatch
Application Se rver
USB
Network
LC1
* WAC = Wide Area Channel
*LC = Local Channel
*TM = Text Messaging
Site 1
RX = f
2
TX = f
1
Slot = 1
WAC1
MOTOTRBO
Digital Repeater
RX = f
3
TX = f
4
MOTOTRBO
Contr ol Station
(digital mode )
Text Message
Server
Presence Notifier
Mu lti-Channel Device Driver
(MCDD)
Text Message
Dispatch
Location Server
Location
Dispatch
Application Se rver
USB
LC2
Site 2
RX = f
4
TX = f
3
Slot = 2
WAC1
MOTOTRBO
Digital Repeater
RX = f
5
TX = f
6
MOTOTRBO
Contr ol Station
(digital mode )
Text Message
Server
Presence Notifier
Mu lti-Cha nnel Device Driver
(M CDD)
Text Message
Dispatch
Location Server
Location
Dispatch
Application Se rver
USB
LC3
Site 3
RX = f
6
TX = f
5
Slot = 2
f
7
s
1
f
8
s
1
LC4
MOTOTRBO
Digital Repeater
RX = f
7
TX = f
8
d
i
g
i
t
a
l
MOTOTRBO
Contr ol Station
(digital mode )
LC5
RX = f
8
TX = f
7
Slot = 1
MOTOTRBO
Contr ol Station
(digital mode )
RX = f
8
TX = f
7
Slot = 2
f
8
s
2
f
7
s
2
d
i
g
i
t
a
l
f
5
s
2
f
6
s
2
d
i
g
i
t
a
l
f
3
s
2
f
4
s
2
d
i
g
i
t
a
l
f
1
s
1
f
2
s
1
d
i
g
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( MASTER )
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