Installation guide

LMU Users Guide

V1.0.6 December 10 2009

- 120 - CalAmp Proprietary & Confidential

14.3.4.3 Configuring the Aux Port

The setup of our Aux Port takes a similar series of steps as the Host Port since the Point of

Sale Terminal is a serial device. The only main different is that we will be focusing on S-

Registers 160 through 169

Our starting point is again the mode of the Aux Port. The Aux Port doesn’t support long

message mode, but it does support NMEA output. The Point of Sale Terminal only handles

data based on credit card processing so we will want to make sure NMEA mode is turned

off:

ATS160=0

The User Message ID has already been chosen by the Host Port setup, so we can move onto

the message disposition. Given this is a credit card transaction; we will want to send the

message as soon as possible but not lose it. This means we will again use a Send/Log option.

ATS167=2

The serial settings for the Point of Sale Terminal are the same as the Net955, that is, 9600

BAUD, 8 Data Bits, No Parity and 1 Stop Bit.

ATS161=5

ATS162=3

The Point of Sale Terminal’s message is always encrypted and thus we cannot rely on a

single Termination Character, so we should turn that feature off.

ATS163=0

ATS164=0

The Point of Sale Terminal’s message does however, have a standard length, namely 120

bytes. We will use this as the Message Termination Length.

ATS165=30

We can turn off the Message Termination Time limit and the Message Count Filter.:

ATS168=0

ATS169=0

Lastly we need to select a User Message ID for the credit card messages. It’s generally a

good idea to make this a different value than what’s used for the Host Port messages,

though it’s not strictly necessary. We are going to use a value of 2.

ATS166=2