Installation guide

LMU Users Guide
V1.0.6 December 10 2009
Copyright ©CalAmp DataCom Inc 2009
- 75 - CalAmp Proprietary & Confidential
10.3
The Maintenance settings of the LMU are used to communicate with the PULS system.
They define what IP address and port the Maintenance data should be sent to. They also
define how often the Maintenance Message should be created. The Maintenance Message is
the LM Direct ID Report and thus does not contain any location data about the particular
LMU.
Maintenance Settings
10.3.1 Maintenance Delivery
Like the Inbound settings, the Maintenance settings consist of an IP address, Port and URL
for the LMU-2500™ and LMU-4100™ which are controlled by Parameters 2310, 2311 and
2320 respectively. The other LMU products (MTU-100™, LMU-1000™, LMU-1100™ and
LMU1200™) just support the Maintenance Port and URL Parameters. Users should not
adjust these settings unless explicitly told to do so by CalAmp support personnel. Changing
these values may limit your ability to use PULS to manage your LMUs.
10.3.2 Maintenance Configuration
The Maintenance Configuration Parameter (2312) controls if the LMU will create
Maintenance reports. Again, you should not adjust this field as it may impact your ability to
use PULS, however, if you wish to explicitly disable the Maintenance Message you would
use:
AT$APP PARAM 2312,0,15,0
To re-enable it, you would use:
AT$APP PARAM 2312,0,15,1
10.3.3 Maintenance Interval
The LMU creates Maintenance Messages at two points. The first is the initial connection to
the wireless network after a Power-Up or Wake-Up event. If you wish to set the LMU to
send an ID report to PULS with every connection to the network, you would use:
AT$APP PARAM 2312,0,15,2
The second is after the Maintenance Interval has expired. The Maintenance Interval is
controlled by Parameter 2322 and is defaulted to 24 hours. This counter is reset every time
the LMU creates a Maintenance Message. The value of this parameter is in seconds. For
instance, to raise the Maintenance Interval to once every 12 hours you would use:
AT$APP PARAM 2322,0,43200
10.4
The LM Direct Null Message was created to refresh the UDP/IP path through wireless
network firewalls so the back-end system could asynchronously contact the LMU while
attempting to keep data usage to a minimum. Null Messaging is controlled by the Null
Null Messaging