Typical Site

The NexSens 2100-iSIC Landline Modem supports telephone communication between a remote monitoring site and a computer base station. It incorporates a NexSens iSIC that controls the landline modem and monitoring instruments on the communication network.

Shown below is an example site:

iSIC Typical Site

Figure 1: Typical 2100-iSIC Site


The above system consists of the following components:

  1. Analog Telephone Line Connection
  2. PC running iChart Software
  3. 2100-iSIC Landline Modem with Data logger
  4. Analog Telephone Line Connection
  5. A22 20-Watt Solar Panel
  6. Environmental Monitoring Instruments

A computer running iChart software will have a configuration file, called an ICR on it. This file is created in iChart and holds information such as which data loggers are used, and which sensors are connected to that data logger. With this ICR file data can be uploaded and processed from the data logger.


Before your PC can begin to receive real-time data from the 2100-iSIC Landline Modem, a telephone wire must be connected into the modem.

Important: Always remove power from all NexSens communications devices when wiring or connecting antennas and accessing the internal connectors.

Wiring telephone line

Figure 2: Connecting telephone wire into modem


Strip one end of a telephone cable so that the inner wires are exposed.  Strip the tip and ring wires of the telephone cable.  As shown above, one wire is connected to Ring on the analog connector and the other is connected to Tip.  It does not matter which wire goes to Ring and which goes to Tip but they must be the tip and ring wires of the telephone cable.  Plug the other end of the telephone wire into a phone jack.

The tip and ring of the standard RJ11 telephone jack are colored red and green. The other two colors used in RJ11 connectors are yellow and black and do not need to be used. These are the standard coloring of telephone cables commercially available for households. For larger telephone jacks or connections a different wiring may be used.

If the phone line is not already surge protected or located outside near an area that may receive lightning strikes, it is recommended that an A76 Telephone Surge & Lightning protection device be used. This is to prevent damage caused by voltage surges and lightning strikes, which may occur through the telephone wires.



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