C.Nord GSM Operation Manual Download

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25 mA limitation of the current consumed by the product from the automatically disconnected battery;

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stability to both the break and short circuit in the battery circuit is unlimited in time, while the product will
be powered from the main source;

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protection against “reverse polarity” in case of wrong connection to the battery terminals or external UPS;

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automatic periodic testing of the battery and evaluation of its state by several parameters with subsequent
sending of the corresponding notices to the panel program. The option can be disabled while configuring the
product;

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automatic “training” of the battery by periodic short-term sampling of the current pulse into the low-resistance
load built into the product. This procedure implements the charge algorithm with an asymmetric current
with alternating signs current that favorably affects both the completeness of the charge and the lifetime of
the battery operated in the buffer mode. The option can be disabled while configuring the product.

If an external UPS is used as a backup power source, the product continues to periodically monitor the fact of its
connection, but does not monitor the following:

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charge of an external source;

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its periodic testing with an evaluation of the current charge level and value of internal resistance.

1.3

Notification Channels

The product notifications can be sent by the following independent communication channels:

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via GSM 900/1800 cellular networks of two different carriers through the built-in GSM-modem;

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via Ethernet network using the optional “Ethernet Adapter” module, which is installed in the product and
connected to the dedicated socket of the product main board;

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via the radio channel in the midband, VHF, UHF bands with the help of an optional radio transmitter
connected to the interface connector “TR-100 OUT” of the product (for the product in a metal case).

The product in a plastic case is equipped with a small GSM stub antenna without a feeder with an angular connector
of SMA-male type, connected to the connector type of SMA-female type. For products in a plastic case, it is possible
to connect a remote dipole antenna (with a connector of the same type) to improve the communication quality with
the base station of the carrier. The product in a metal case is equipped exclusively with a remote dipole antenna.

To transmit events to the monitoring panel, the device can use the following communication channels:

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GPRS;

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CSD (for devices of hardware version 5.1, 5.2, 5.7);

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VOICE (voice channel with DTMF-encoding);

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SMS.

In the mode of packet transmission of notifications (GPRS), the content is encrypted.

The device has a two-tier SIM-card holder, in which it is possible to install two SIMs of different carriers. The
active SIM is selected automatically, in accordance with the established algorithm of the cellular communication
module. In addition, there is an unconditional transfer to another SIM when the user presses a button installed
next to the SIM holder.

The device can estimate the signal level in the carrier networks at the device installation site separately for each of
the two SIMs and display the received result in the configurator interface.

1.4

Functionality

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configuration of up to 16 alarm wired zones intended for receiving notifications from analogue manual and
automatic security and fire detectors, security and fire alarm system units through the outputs of the central
security panel relays;