chosen as the terminator to allow manually typing commands using a simple text terminal.

4.6. Examples

In the following examples, Vortex commands are enclosed in single quotes, 'like this'. Also, the terminator character is not explicitly shown, but its presence is implied.

Consider the command '***PING'. The device type and ID for this command are wildcards, thus the command will be sent to all devices. The command name in this case is 'PING', and there are no data characters (payload). Note that the 'PING' command is supported by all of the Vortex devices, thus broadcasting the command to all devices makes sense.

Consider the command 'S**GAINIA10'. The device type for this command is 'S' and the device ID is a wildcard, thus the command will be broadcast to all EF2211 devices linked together. The command name in this case is 'GAINIA' and the command data (payload) is '10'. This command sets the gain on input A of all connected EF2211's to 10 dB.

Command

Effects

***PING

Requests PONG response from all linked Vortex devices.

S**GAINIA10

Sets the gain on input A of all connected EF2211 devices to 10 dB.

5. Status Messages

The Vortex sends status messages via RS-232 and EF Bus any time one of its internal parameters changes. This means that the host program does not need to continually poll the Vortex in order to detect status changes. Status messages are in the same format as the commands used to set the corresponding parameter.

For example, suppose you send the command 'S**GAINIA10' and there are two EF2211's linked together with device IDs 3 and 7. The EF2211's will respond with 'S03GAINIA10' and 'S07GAINIA10', respectively. Now, someone uses the front panel of the EF2211 set to ID 7 to decrease input A's gain by 1 dB. When this happens, the EF2211 will respond with 'S07GAINIA9'. This example illustrates that status messages can be sent as the result of an RS-232 command or as the result of some other change in the Vortex device such as front panel adjustments, logic inputs, etc.

Status messages can be turned off via the ACKMOD command. ACKMOD refers to acknowledgement mode since the term status message and acknowledgement are synonymous for our purposes.

6. Command Types

Many of the Vortex commands have similar formats. The main formats are described here in order to provide a better understanding of the command set.

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Polycom RS-232 manual Examples, Command Effects, Requests Pong response from all linked Vortex devices
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RS-232 specifications

Polycom RS-232 is a key interface utilized in various communication and audiovisual systems, enabling effective integration between different devices. This technology employs a standard serial communication protocol that allows for robust control and communication, particularly in environments that require sophisticated audiovisual setups.

One of the main features of Polycom RS-232 is its ability to facilitate point-to-point communication over distances of up to 50 feet without the need for a repeater. This long-range connectivity is essential in large conference rooms and auditoriums where devices are often spread out over considerable distances. The serial connection is often more reliable than wireless options, which can be susceptible to interference.

Another notable characteristic is its versatile compatibility with a range of devices, including cameras, projectors, and interface panels. This allows users to control multiple devices from a single point, streamlining the operation of complex setups. The straightforward nature of RS-232 commands simplifies integration, which is a significant benefit for both installers and end-users.

Polycom RS-232 also supports various baud rates, giving users the flexibility to optimize communication speed based on their requirements. This adaptability ensures that users can achieve the desired performance, whether they are managing basic functions like power and volume control or more complex commands for switching video sources or adjusting settings.

The technology also features error-checking capabilities, which contribute to its reliability in communication. This reduces the likelihood of issues during operations, ensuring that commands are correctly received and executed. Additionally, its structured protocol aids in diagnosing and troubleshooting, making it easier to manage any issues that arise.

With its robust nature and proven reliability, Polycom RS-232 remains a pivotal technology in the realm of audiovisual communications. Its combination of long-range capabilities, compatibility, flexibility, and reliability makes it an essential tool for enhancing the efficiency of modern communication environments. As technology continues to evolve, the importance of dependable interfaces like Polycom RS-232 cannot be overstated, ensuring seamless integration and operation of sophisticated communication systems. Whether used in educational institutions, corporate environments, or event venues, Polycom RS-232 guarantees a streamlined experience in device management and control.
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