User's Manual

Chapter 5: Base Station Configuration
Narrow Band Radio Parameters
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Teklogix 9150 Wireless Gateway User Manual
Table 5.1 Number Of Poll Windows – Cellular Protocol
Size of Poll Windows
The value assigned to this parameter determines the largest message that can be
passed between the 9150 and the terminal in a normal poll window. The window
size can be adjusted to accommodate anywhere from 4 to 32 characters.
Larger windows increase the polling period and can increase the response time.
Smaller windows increase the number of message and long message polls, and can
also increase the response time.
Important: In “Cellular” mode, the minimum value for this parameter is 8.
Maximum Message Segment Size
This parameter determines the largest single message that can be passed to a
terminal in message mode or from a terminal in long message mode. In a 9150 base
station, the value entered in this parameter must be greater than or equal to the value
entered in the network controller or 9150 mini-controller. The range of this parame-
ter is between 32 and 116 characters. (Longer messages are broken into several
packets.) The default value is 100.
Number of Retries
This parameter determines how many times the 9150 attempts to resend a message
if an acknowledgement is not received from the terminal. (These retries do not
necessarily occur in consecutive polls because incomplete messages are returned to
the bottom of the message queue.) After all retries have been exhausted, the terminal
is declared “offline”. The 9150 does not transmit any messages to the terminal until
the terminal declares itself “online”. The allowable values range from 1 to 7.
Number of Terminals Minimum # of Windows
1-16 2
17-81 3
82-256 4