Specifications

i50 Manual (5.10)

Page 51

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12.0 Garmin Interface

The i50 can talk to any Garmin terminal supporting the Garmin Fleet Management Interface (FMI)

version 2. Specifically, it must support Garmin protocols A602, A603 and A604. A special data cable

(available from Garmin suppliers) is required to connect the Garmin terminal to the i50.

If any i50 port is configured to use a Grace pager system, the i50 will send special messages to the

Garmin whenever a pager signal is detected or lost, or an alarm message is received. Also, when the

i50 boots up it will send a message stating the current list of pagers in range. When a pager test

signal is received, the i50 creates a Garmin message to display the test, allowing a user to respond

directly to the pager, or else wait for an ACK from the server. If the pager receiver stops responding

for any reason, a Garmin message will be sent to warn the user that the pager system is down.

Two-way text messaging is supported using the standard Garmin messaging screens. These

messages can be sent to and from DataHost clients.

The Garmin Quick Message list is automatically populated with one or more messages when the

Garmin is connected. This list provides a way to request the current i50 status (network, GPS, and

pager states). If a Grace system is enabled, another quick message is provided to call-back all

Super-Cell pagers in range. This feature alerts each pager and displays a call-back message on

screen.

DataHost clients have the option of sending stop locations to the Garmin terminal. Drivers can then

select these stops from a list, causing the Garmin to calculate a route and guide the driver to the

desired location. The status of stops as well as the estimated-time-of-arrival (ETA) for the current

route can be sent to the server as they change (if enabled in the i50 options). Note that the ETA is

transmitted whenever it changes by more than 10%, at a maximum rate of once per minute. The ETA

is transmitted as either the actual time of arrival (e.g. 10:15 pm) or time remaining (e.g. 25 min),

depending on which is more constant. This prevents unnecessary data transmissions if a vehicle

stops and starts while en route.

An optional firmware feature is support for Garmin driver logging. This firmware monitors the Garmin

driver name and driver status fields, sending them back to DataHost clients. The Garmin driver status

list is automatically populated with a range of commonly used status strings when the unit is

connected to the i50.