58 System Feature Overview
April 2011 68007024085
In conventional mode, when ARS is sent on the Home channel, the table below can be used as a
guideline to choose the delay values based on voice call loading and the number of subscribers in
the system.
2.4.3.6 Data Revert Channel
A Capacity Plus system extends the “GPS Revert Channel” feature to the “Data Revert Channel”
feature. This feature is available only in Capacity Plus mode as a configurable option. The Data
Revert Channel feature allows system operators to offload all data messages from radios to a
Server (e.g. registration messages, location responses, text messages to the Server, and their
over-the-air acknowledgements, etc.) onto programmed digital channels (called Data Revert
Channels). Data messages (including their over-the-air acknowledgements) from radio-to-radio
and from the Application Server to radios are always sent over the Trunked Channels.
The Data Revert Channel feature is optional. In the absence of this feature, data messages are
sent over the Trunked Channels. This feature should be used when there is a need to reduce data
traffic from the Trunked Channels. Data Revert Channels will free up the Trunked Channels and
the Trunked Channels can accommodate increased voice loads. This also enhances the user
experience by reducing the number of busy channels during voice calls.
9
90 33 66 99 132 165 198 231 264
75 81 162 243 324 405 486 567 648
60 132 264 396 528 660 792 924 1056
45 183 366 549 732 915 1098 1281 1464
10
90 30 60 90 120 150 180 210 240
75 75 150 225 300 375 450 525 600
60 120 240 360 480 600 720 840 960
45 165 330 495 660 825 990 1155 1320
Number of Radios Sending ARS Based on ARS Initial Delay Value
30
mins
60
mins
90
mins
120
mins
150
mins
180
mins
210
mins
240
mins
No Voice 300 600 900 1200 1500 1800 2100 2400
Low Voice ** 51 102 153 204 255 306 357 408
High Voice ** 24 48 72 96 120 144 168 192
** Refer to Section 4.4.2 “Voice and Data Traffic Profile” for the definitions of “High Voice”, and “Low Voice”.
Total Number of Radios Sending ARS based on ARS Initial Delay Value
Window
Size
Periodic
Loading
(%)
30
mins
60
mins
90
mins
120
mins
150
mins
180
mins
210
mins
240
mins
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