ZyWAN User Manual
Configuring the ZyWAN
© 2008 Arcom Issue D
78
Field/Option
Explanation
Unit ID:
Enter the unit ID which identifies the GPS data from this
ZyWAN when reported to a host computer. This allows the
host computer to have unique identifiers for data coming
from multiple remote units.
When using the Actsoft format, this
Unit ID
must be a unique
10-character serial number to identify this device in the
Actsoft system.
For
ZyWAN-GPRS
: The
Unit ID
is a unique 10-character
serial number, with format to be specified by ActSoft.
For
ZyWAN-IDEN
: The
Unit ID
is the 10-character modem
serial number.
For
ZyWAN-GPRS
: The
Unit ID
is a unique 10-character
serial number, with format to be specified by ActSoft.
It is essential to observe that this modem serial
number is entered correctly. If not, and if duplicate
ID’s are reporting from any other device, both
customers may suffer loss of data and an
interruption of service.
Enable Cache?
Select
Yes
to enable caching of GPS data. When caching is
enabled, the ZyWAN stores 100 positions in non-volatile
memory. After this cache is filled, the oldest positions are
discarded. Once the network connection is re-established,
positions in the cache shall transmitted in a first-in, first-out
order.
When
Enable Cache
is set to
Yes
, a UDP acknowledgement
is required from the host computer, which allows the ZyWAN
to verify the data has been received. If the UDP
acknowledgement is not received, the data points begin to
be cached.
The
Enable Cache
option requires that the ZyWAN
network address must be accessible to host
computer, since the host must initiate a one-way
UDP acknowledgement message to the ZyWAN. If
the acknowledgement is not received (due to
network problems, etc.), the ZyWAN caches the
GPS points based on the
Request Interval
and
Send Threshold
parameters (above), and continues
to try sending the next point every 10 seconds.
When
Enable Cache
is set to
No
, a UDP acknowledgement
is not required. The ZyWAN simply sends out the GPS
points and discard them locally. If the host computer does
not receive the position message, those positions are lost.
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