User's Guide

DRAFT 11/10/04

Confidential Information 8 PN: 900-003x-000 DRAFT

GSM status values

• Registered : this is a normal operating mode. The modem has a good radio signal and is

registered.

• Reg-wk-sig : The GSM modem is registered, and the iWM will operate normally, but the

radio signal strength is marginal. This is most likely due to poor GSM coverage but could

also indicate a bad/damaged GSM antenna.

• Good signal : The modem is not registered. The iWM will not transmit or receive data. If

the signal remains strong for several minutes, but the status does not change to

“registered” then there may be a problem with the IP address. Contact @Road customer

satisfaction and report the condition.

• Weak signal : The modem is not registered and has a weak signal. This is most likely due

to being in an area of poor coverage, but may indicate a problem with the GSM antenna or

the IP address. The iWM will not transmit or receive data in this state so @Road customer

satisfaction should be contacted.

GPS Status values

The GPS status comprises a description, followed by a number (0-8) and a letter A or B in

brackets. The letter is for engineering diagnostics only, but should be reported to customer

satisfaction when reporting trouble with a unit.

• In-fix (7A) : The GPS module is performing position fixes, and is tracking 7 satellites. This

is the normal operating mode. (The actual number of satellites tracked may vary between

4 and 8 when in this mode, the greater the better).

• Tracking (3B) : The GPS module is tracking satellites, but is not performing position fixes.

In a stationary vehicle the unit may take up to 60 seconds to start to make position fixes

when it is tracking satellites. If, after 60 seconds, the unit is still not making position fixes

then this is most likely due to not tracking enough satellites (at least 4 must be tracked).

This may be due to bad placement of the GPS antenna, or may be because the vehicle is

parked in an area of bad coverage (e.g. next to a tall building or under trees. However in

this state it is certain that the GPS module is functioning correctly.

• No-track (0A) : This indicates that the GPS module is not tracking any satellites. A new

unit should start to track satellites within 60 seconds of having the power applied. If not

then likely problems are that the vehicle may be parked in a bad location, the GPS

antenna may be badly placed, with a limited view of the sky, or the GPS antenna may not

be connected fully to the iWM. It is very rare that the problem is in the iWM itself, since

this is tested at the factory.

StatWhere switch status

The switch status shows 4 digits which are either 0 (switch not activated) or 1 (switch

activated). By activating the switch while observing the display it is possible to confirm that

the iWM is correctly sensing the state of the switches.

Data2 status

This field shows which peripheral the iWM is expecting to have connected to data2. If it is

configured to be the temperature sensor then the display will also show the current

temperature of the sensor in degrees Celsius. (To perform a rough conversion from Celsius to

Fahrenheit multiply by 2 and add 32. E.g. 25 C is approximately 82 F).