8
Dispatching center
– data collection and dispatching center intended to poll external devices, installed on
sites, and to monitor and control the system modems.
Data collection server
1
– the server where all the system data is accumulated and processed: data from ex-
ternal devices and system's service information. The modem-clients are connected to the data collection server
and transmit the required data, the external device polling software is also connected to the server and re-
quests the data received by the server from the modem.
External device
– the device mounted on a site and connected to the modem via the RS232 communica-
tions interface. Heat and energy meters, as well as any systems of telemetry and telemechanics, may operate
as external devices.
SMS command
– an SMS message sent to the modem, containing a character-based command of a certain
format.
2. Product Overview
2.1. Product Purpose and Main Functions
The iRZ ATM 3G communicator provides data transmission via TCP/IP protocol stack. The device is de-
signed for operation in telemetry systems.
The modem can operate in any of the three modes: client, server or CSD only In the
Client
mode (hereinaf-
ter
– client modem) the modem is connected to the data collection server and transmits data from an external
device. In the
Server
mode (hereinafter
– modem server), the modem, on the contrary, waits for the client in-
coming connection (for example, from a dispatcher computer) on a certain port and processes it. In the
CSD
Only
mode data is transmitted via CSD (voice channel) with no data transmission over network and the offline
mode available.
For operation in the
Client
mode you can use any SIM card, for operation in the
Server
mode it is recom-
mended to use a SIM card with an external
2
static IP address. For operation in the
CSD only
mode you can
use any CSD-enabled SIM card.
In the
Client
and
Server
modes the modem automatically connects to the network. After that the modem es-
tablishes connection to the specified server (if operating in the client mode) or opens an incoming port and
waits for incoming connections (if operating in the server mode).
1
2 Used if the modem and the external devices polling software operate as clients. If the modem operates in the server
mode, the software can be connected to it directly and read out the required data.
2
If your company rents an access point (APN) from a mobile network carrier, addresses of the sites for such network will
be internal. In this case it is recommended to use a private static address.