Installation guide

LMU Users Guide

V1.0.6 December 10 2009

- 56 - CalAmp Proprietary & Confidential

AT$APP PARAM 1025,0,1,1

The corresponding disable commands would be:

TAIP Interface:

AT$APP PARAM 1025,0,8,0

Inbound Messaging:

AT$APP PARAM 1025,0,4,0

Event Reporting:

AT$APP PARAM 1025,0,2,0

PEG Processing:

AT$APP PARAM 1025,0,1,0

8.2

When the LMU receives a UDP packet

Access IP Address List

it compares the source IP address with those

contained in its Access IP Address list. If the LMU finds a match, then the LMU will

process and, if needed, respond to the incoming packet. If the LMU does not find a match it

will ignore the message. By using this list is it therefore possible to control which servers the

LMU will and will not respond to.

Up to four IP addresses can be assigned to this list. If an octet is set to 255, that octet is

treated as a wild card to allow filtering on a subnet level. For instance, the default value in

the Access IP Address list is 255.255.255.255. This IP will allow the LMU to respond to any

IP address.

It is very important to have at least one value on this list. If all four IP addresses are cleared

(i.e. set to 0.0.0.0), the LMU will not respond to any messages from any server or

application. You will need to visit the LMU in person and alter the settings via a serial cable.

It is also important to keep one of the addresses set to the PULS IP address

(207.71.209.248). If you choose to leave the PULS IP address off this list, then you will not

be able to take advantage of any of PULS’ features.

The Access IP Address list is controlled by Parameter 1281 and contains 4 Indexes (0 – 3).

Each Index defines a new IP address.

For example say we wish to limit the LMU to three IP addresses, the IP of PULS, the IP

address range used by your office and the IP address range used by your data hosting

facility

This could be an LM Direct message or a TAIP sentence

This sort of setup would have access to PULS, a development LM Direct server hosted in your office and

a production LM Direct server hosted in your data center.