User`s manual

DuraMAR 2150 – User’s Manual

DuraMAR-2150 service interface

A GPRS modem is included as part of the DuraMAR-2150 system in order to provide a diagnostics and

backup/emergency connection to the system in the event that the HSDPA link fails.

This GPRS modem has a serial interface and can be connected through a software-controlled switch either

to the

AUX interface of the CISCO 3200 ISR or to the ttyS1 interface of ECC using a software command or

an SMS command message.

The

gprs0 interface is a 2G cellular interface that is mainly targeted for maintenance activity.

This is a special interface because it can be disconnected from the ECC and connected to the

AUX port of the

CISCO 3200 ISR using a software command. While connected to the ECC, its configuration is similar to the

configuration of the

hsdpa0 interface.

While connected with the ECC the GPRS modem is accessible as

gprs0 interface and allows you to

establish a PPP connection and to access the device through the Internet.

If switched to the CISCO 3200 ISR, the GPRS modem is accessible and configurable using standard IOS®

commands as a modem device connected to the

AUX router port.

You can define the device that the GPRS modem is connected with using the command:

set gprs cisco | controller

The change is immediate; if you want this setup to be permanent, you must save the running configuration

issuing the

copy running command.

The GPRS modem is connected to a dedicated microcontroller that can force a system hardware reset. The

reset functions can be asserted in response to a specific SMS command message.

In order for the message to be accepted by the system, it must be sent from a number that is contained in

the internal SIM phonebook, messages that are received from unknown numbers are removed from the

received message buffer.