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.
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