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Polycom RS-232 manual Introduction, Initialization

Models: RS-232

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8.149. SSTEXT -- Set Text to be Displayed by Screen Saver 8.150. SWRESET -- Perform Soft Reset of System

8.151. SWVER -- Query Software Version

8.152. TONEE -- Enable or Disable Entry and Exit Tones 8.153. TONER -- Enable or Disable Ring Tones

8.154. VTXMODI -- Enable VTX Mode on Specified Inputs 8.155. VTXMODO -- Enable VTX Mode on Specified Inputs

1. Introduction

This document describes the command protocol that is used to communicate with the Vortex EF2211 via its RS-232 port.

2. RS-232 Hardware

The communication between the Vortex and a host controller is conducted via the RS-232 port on the back panel of the Vortex. The Vortex's RS-232 port operates at the following settings:

●Bit Rate (bps): 9600 (default), 19200, or 38400

●Data Format: 8 data bits, no parity, 1 stop bit (8N1)

●Flow Control: none (default) or hardware (RTS, CTS)

Note that although the flow control setting is user selectable to none or hardware, hardware flow control must be used when updating the firmware of the Vortex. This means that while a 3-wire RS- 232 cable (RX, TX, GND) is acceptable for control of the Vortex, the minimum cable for updating firmware should contain 5 wires (RX, TX, RTS, CTS, GND).

3. Programming Tips

3.1. Initialization

During power up of the Vortex device or initialization of the host program, electrical fluctuations on the RS-232 lines may cause the Vortex to receive spurious data. After initialization, the host program should send a few carriage return characters (^M, ASCII 13) to the connected Vortex to flush out any spurious characters it may have received. Failure to do this could result in the Vortex ignoring the first command received after initialization.

As part of the host program initialization, the host will want to synchronize the status of its controls with the current status of the Vortex devices that are being controlled. The host could initialize its controls to default values and then send commands to the Vortexes to set them to the same state. This approach has significant disadvantages since initializing the host program could undo settings made by other host programs or by the front panel controls of one of the linked Vortex devices. A better approach is to query the linked Vortex devices for their status and set the host program controls based on the return values.

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Polycom RS-232 manual Introduction, Initialization
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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.