Internet Communication Module 7845i-GSM Installation and Setup Guide
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If the Internet AND GPRS (part of the GSM cellular network) are both unavailable, the
7845i-GSM will attempt to send the transmission via SMS (Short Message Service), also
known as a text message. If all three methods fail, the message will not be sent via this
device.
About AlarmNet-I Internet Application
AlarmNet-I is a fully encrypted, secure method of delivering alarm messages from a
protected premise to an AlarmNet equipped central station. An Internet Communicator
Module transmits status, supervisory, and alarm messages to the AlarmNet Control Center
using a broadband Internet connection.
The AlarmNet Control Center identifies, validates, and forwards the messages to the
appropriate AlarmNet central station. AlarmNet-I has an unlimited account capacity.
Encryption
The 7845i-GSM supports private key encryption. Private key encryption means that both the
sender and the receiver know the KEY used to encrypt the data. Each device produced by
Honeywell is loaded with a globally unique identifier called a MAC number, and a large
random number or KEY. This KEY and MAC number are also stored in the AlarmNet
servers. When a device contacts AlarmNet, it sends the MAC number in the clear followed by
the message that is encrypted using the KEY data. The server looks up its copy of the KEY
based on the MAC number and uses that KEY to decrypt the message.
The 7845i-GSM uses 256 bit AES (Rijndael) encryption (which is required for certain
government installations). The AlarmNet-I AES Encryption Software Module Version 1.0
contained in the Honeywell products has NIST approval. Listings for this approval can be
found at
http://csrc.nist.gov/cryptval/aes/aesval.html
Certification number 127.
System Features
Basic features of the 7845i-GSM include:
•
Easy CAT-5 10 BaseT connection to a hub or router
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Installs behind firewalls without compromising network security
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Supports dynamic or static IP addressing
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Quick connection to compatible Honeywell series control panels
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Simple programming using a 7720P programming tool
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Reports fire, burg, and status messages via the Internet
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Reports messages via AlarmNet-G as backup to Internet reporting
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Allows uploading and downloading of control panel data over the Internet.
Modes of Operation
The 7845i-GSM provides four modes of operation so it can be used with various types of
control panels, as summarized below:
ECP Mode
•
This mode is for use with Honeywell controls that support LRR-ECP communication
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The module connects to the control’s keypad terminals and provides 2-way communication
with the control using ECP messaging
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The control treats the module as a Long Range Radio (LRR) device, so program the control
accordingly, including setting the module’s proper LRR device address
