Accessing an IQ Network Remotely Using a Modem
Modems are a part of almost everyone's life. Chances are you are using one now to look at this web page. Modems can be used to control IQ Networks from any remote location with a good data connection. Here's how...
|What does a modem have to do with audio? It can be a very important part of your system if it is under IQ Network control. Modems are the way we connect computers over phone lines. The IQ Network uses a computer for setup, monitoring, control, and diagnostics. If you and your computer are not anywhere near the audio system, then modems may be the only effective way of connecting you and your system.
There are two methods that can be used to connect to an IQ Network using modems. The method you use will depend on nature of the application.
|PC to PC
|In many systems the PC remains connected to the IQ Network Interface at all times. In this case the remote PC uses its modem and third-party remote control software to call the host PC. The host PC (connected to the IQ Network) must have a modem and host modem software that can answer the incoming call from your remote PC. The remote PC is then used as a terminal to the host PC. From the remote PC you can "take over" the host PC and run the IQ software to access the IQ Network components. The benefit of this type connection is that a host PC can be connected to the IQ Network at all times. Also, connection of the host PC to the IQ Network is not limited by the modem connection to the remote PC. Another benefit is security. Modem software for remote connection often includes password security options that would restrict unauthorized users to dial in. Popular third-party remote control software packages include ReachOut, CloseUp, and PCAnywhere. The most significant restriction to this method is the requirement to have a PC always connected on site, equipped with a modem and the supporting software.
|PC to IQ Direct
|Once an IQ System is initially configured, the PC becomes optional. Often this means that a laptop PC is used for initial configuration, then is removed. System operation then relies on IQ automation and distributed intelligence for day to day use. For any number of reasons you may, from time to time, need to access the system remotely. If there is no PC on site, the alternative is to dedicate a modem and a phone line to the IQ Network for remote access. IQ for Windows software offers support for direct modem connection. On your remote PC, run the IQ software and use its remote modem feature to call the phone number of the remote modem. The benefits of this method are that you do not need to invest in a dedicated PC at the remote site or the modem software required by a PC to PC connection. Connection speed is limited to the highest interface baud which is lower than the lowest modem baud used by either modem. In most cases we recommend running at 9600 baud. Even at this reduced speed, however, the effective speed is much higher at the remote PC because the IQ software is running on the remote PC. All of the newer interfaces available today includes support for direct modem connection, however older units and other types of IQ interfaces may not support direct modem connection. If you have an existing system and wish to upgrade your interface for direct modem support contact IQ support.
|Host PC to Interface
|The standard RS-232 connections are used between the PC and the interface.
|Host PC Software
|Any IQ software compatible with the system's components may be used. The host PC must be running remote control software (described above) and must have a modem with a phone line connection.
|Any modems may be used, although the faster the modems, the better the screen display at the remote PC.
|Remote PC Software
|The remote PC does not need to have the IQ software. It must run compatible remote modem software with a modem and telephone connection.
|Remote PC Software
|The remote PC must have IQ for Windows installed.
|Modems should operate at 14,400 baud or higher and the host modem must be external to the PC and capable of auto-answer.
|Host Modem To Interface
|The host modem is connected to the IQ Network Interface by RS-232. Most external modems offer a 25-pin RS-232 port. The wiring method depends on the whether the interface has a 25-pin or 9-pin RS-232 connector. If it has a 25-pin connector, use a standard null-modem cable. If the interface has a 9-pin RS-232 connector, special wiring is required for proper operation. See the diagram below:
9-Pin Interface to Modem RS-232 Wiring Diagram
Note: Because IQ interfaces with 9-pin ports automatically detect RS-422, pins 4, 6, 7, and 8 should be physically removed from one male connector on the standard 9-pin to 9-pin RS-232 cable.