Comprehensive Product Summary – GTS508T Ethernet to 8x Serial + 1x Parallel Port Server

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### 1. Product Overview

Product Name: GTS508T
Model: GTS508T
Series: GTS500 Series Communication Servers
Article Number: GTS508T
Manufacturer: Rayon

The GTS508T is a high-performance Ethernet-to-multiport serial and parallel communication server designed for industrial, commercial, and enterprise networking environments. It provides eight serial ports and one parallel port, enabling seamless integration of legacy serial and parallel devices into modern Ethernet-based networks. The unit is rack-mountable (19"), making it suitable for data centers, control rooms, and industrial automation systems requiring centralized device connectivity and remote management.

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### 2. Key Features

- Multiport Communication Server: Supports 8 serial ports (DB25 female) and 1 parallel port (DB25 female) for connecting multiple serial and parallel devices to an Ethernet network.
- Ethernet Connectivity: Provides Ethernet interface options (UTP/BNC/AUI) for flexible network integration across different physical media types.
- High Throughput: Each serial channel supports data throughput from 50 bps up to 57.6 kbps, ensuring reliable communication for a wide range of serial devices.
- 19" Rack-Mountable Design: Standard rack-mount form factor for easy installation in network or equipment racks.
- Windows Driver Support: Compatible with Windows NT, 2000, and XP operating systems through dedicated GTS500 series drivers.
- Remote Management: Supports Telnet-based remote console access for configuration and monitoring.
- Console Configuration Mode: Local console setup via serial port for initial configuration and IP address assignment.
- Flexible Serial Modes: Configurable RTTY (Radio Teletype) mode for serial communication compatibility with Windows drivers.
- Command-Line Interface (CLI): Built-in command interpreter accessible via console or Telnet for system configuration, diagnostics, and management.
- Firmware-Based Configuration: Persistent configuration storage with “save all” command ensuring settings are retained after power cycles.
- Industrial Reliability: Designed for continuous operation in demanding environments with robust hardware and stable firmware.

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### 3. Technical Specifications

| Parameter | Specification |
|----------------|-------------------|
| Model | GTS508T |
| Series | GTS500 Series |
| Manufacturer | Rayon |
| Ethernet Interface | UTP / BNC / AUI |
| Serial Ports | 8 × DB25 female connectors |
| Parallel Port | 1 × DB25 female connector |
| Data Throughput (Serial) | 50 bps to 57.6 kbps per channel |
| Mounting Type | 19-inch rack mountable |
| Configuration Interface | Local console (serial port 1) and remote Telnet |
| Supported Protocols | TCP/IP, Telnet, RTTY mode for serial communication |
| Default Console Settings | 9600 bps, 8 data bits, no parity, 1 stop bit |
| Power-On Indicators | Front panel LEDs (LED1–LED16) for status indication |
| Control Interface | Front panel “INT” push button or LCD control panel (for LCD versions) |
| Operating Systems Supported | Windows NT, Windows 2000, Windows XP |
| Driver Utility | gport_ap.exe (COM port mapping utility) |
| Configuration Commands | sysconfig reinit, ifconfig, save all, mode rtty all |
| Default Password | root |
| Communication Mode | RTTY mode for Windows driver compatibility |
| Firmware Update / Configuration | Via console or Telnet interface |
| Email Support Contact | rayon@ms1.hinet.net |

*(Note: Dimensions and weight are not specified in the provided content but the unit conforms to standard 19" rack-mount dimensions.)*

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### 4. Functionality

The GTS508T functions as a network communication server that bridges Ethernet networks with multiple serial and parallel devices. It allows legacy equipment—such as printers, industrial controllers, modems, and instrumentation—to communicate over TCP/IP networks without requiring direct serial connections to host computers.

Operational Workflow:
1. Ethernet Interface: The device connects to a LAN via UTP, BNC, or AUI connectors.
2. Serial/Parallel Device Connection: Up to eight serial devices and one parallel device can be connected simultaneously.
3. Data Conversion: The GTS508T converts Ethernet packets into serial or parallel data streams and vice versa, enabling transparent communication between networked systems and peripheral devices.
4. Driver Integration: Through the Windows GTS500 series driver, each serial port can be mapped to a virtual COM port on a Windows system, allowing applications to communicate with remote serial devices as if they were locally connected.
5. Configuration and Management: The device can be configured locally via a serial console or remotely via Telnet. Parameters such as IP address, port modes, and communication settings can be adjusted through command-line commands.

Use Cases and Applications:
- Industrial automation systems connecting PLCs, sensors, and controllers.
- Remote serial device management in data centers.
- Networked access to serial printers, modems, or instrumentation.
- Integration of legacy serial equipment into modern Ethernet networks.
- Multi-user environments requiring centralized serial device sharing.

Compatibility:
- Compatible with Windows NT/2000/XP systems using the provided driver.
- Supports standard serial communication protocols and RTTY mode for driver integration.
- Works with standard Ethernet infrastructure and TCP/IP networks.

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### 5. Components & Accessories

Included Components:
- GTS508T main unit (Ethernet to 8x serial + 1x parallel port server)
- Front panel with LED indicators and “INT” push button (or LCD control panel for LCD versions)
- 8 × DB25 female serial connectors
- 1 × DB25 female parallel connector
- Ethernet interface ports (UTP/BNC/AUI)
- Power supply input (details not specified)
- Rack-mount brackets (for 19" installation)

Optional / Related Accessories:
- Serial cables (DB25 male-to-female or DB25-to-DB9 adapters)
- Ethernet cables (UTP, coaxial for BNC, or AUI transceivers)
- Windows driver package (ZIP file)
- Configuration utilities: `gport_ap.exe` and `setup.exe`
- Terminal software for console configuration (e.g., HyperTerminal, PuTTY)

Connectors:
- Serial Ports: 8 × DB25 female connectors
- Parallel Port: 1 × DB25 female connector
- Ethernet Ports: UTP (RJ45), BNC, and AUI connectors

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### 6. Installation & Setup

System Requirements:
- Windows NT, 2000, or XP operating system
- Available Ethernet network connection
- Administrative privileges for driver installation
- Terminal or Telnet client for configuration

Installation Steps:

A. Windows Driver Installation
1. Obtain the Windows driver ZIP file for the GTS500 series from the supplier.
2. Create a directory on the Windows system and extract the ZIP file.
3. Run setup.exe to install the driver.
4. After installation, locate the gport_ap.exe utility in the system.

B. Configuring GTS for Windows Driver
1. Access the GTS console (local or remote).
2. Set all serial ports to RTTY mode using the command:
```
set mode rtty all
save all
```
3. This enables compatibility with the Windows driver.

C. Mapping COM Ports in Windows
1. Run gport_ap.exe to open the COM port mapping interface.
2. Assign the GTS IP address and serial port number (1–16) for each virtual COM port.
3. Save the configuration and reboot Windows to activate the new COM ports.

D. Initial GTS Setup (Local Console Mode)
1. Connect a terminal to serial port 1 using 9600 bps, 8 data bits, no parity, 1 stop bit.
2. Power on the GTS508T. When LEDs 9–16 illuminate, press the “INT” button (or “→” key on LCD models) to enter console mode.
3. Use the “?” command to list available commands.
4. Run:
```
sysconfig reinit
ifconfig
```
to initialize and configure the IP address and Ethernet connector type.
5. Save settings with “save all” and reboot.

E. Remote Console Setup (Telnet Mode)
1. Once the IP address is known, connect via Telnet.
2. Log in with the default password root.
3. Use “?” to view commands and configure parameters.
4. Save changes with “save all”.
5. Note: INIT mode cannot be accessed remotely; it is only available via local console.

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### 7. Performance & Capabilities

- Serial Throughput: Each of the eight serial channels supports data rates from 50 bps to 57.6 kbps, suitable for most industrial and legacy communication devices.
- Parallel Port Performance: Optimized for standard parallel data transfer operations.
- Network Efficiency: Designed for stable Ethernet communication with minimal latency.
- Multiport Operation: Simultaneous operation of all serial and parallel ports without performance degradation.
- Driver Integration: Virtual COM port mapping allows transparent communication between Windows applications and remote serial devices.
- Reliability: Continuous operation with automatic session termination in Telnet mode to conserve processing resources.
- Scalability: Supports up to 16 serial ports in configuration (depending on model variants within the GTS500 series).
- Limitations: INIT mode configuration is restricted to local console access; remote users cannot perform system reinitialization.

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### 8. Standards & Compliance

- Network Standards: Compliant with standard Ethernet protocols (10Base-T, 10Base-2, AUI).
- Serial Communication Standards: RS-232 compatible via DB25 connectors.
- Parallel Communication Standards: IEEE 1284 compatible parallel port.
- Operating System Compatibility: Certified for Windows NT/2000/XP environments.
- Command Interface: ANSI terminal compatible command-line interface.
- Regulatory Compliance: Designed to meet general industrial and IT equipment standards (specific certifications not listed in provided content).

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### 9. Additional Information

Warranty:
Standard manufacturer warranty (details not specified; typically includes coverage for hardware defects under normal use conditions).

Technical Support:
For technical assistance, configuration help, or troubleshooting, users can contact Rayon support via email at rayon@ms1.hinet.net.

Maintenance:
- Periodic firmware updates recommended for optimal performance.
- Configuration backups should be maintained using the “save all” command.
- Regular inspection of Ethernet and serial connections to ensure signal integrity.

Software Updates:
Driver and firmware updates are distributed as ZIP files by the supplier. Users should verify compatibility with their operating system before installation.

Documentation & Resources:
- GTS500 Series User Manual (not included in provided content)
- Windows Driver Installation Guide
- Command Reference for GTS Console and Telnet Interface

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### Summary

The Rayon GTS508T Ethernet to 8x Serial + 1x Parallel Port Server is a robust, rack-mountable communication server engineered for integrating multiple serial and parallel devices into Ethernet networks. With flexible configuration options, reliable throughput, and comprehensive Windows driver support, it serves as a versatile solution for industrial automation, remote device management, and legacy system integration. Its combination of multiport connectivity, remote management, and stable performance makes it a dependable choice for organizations seeking to modernize serial communication infrastructure while maintaining compatibility with existing equipment.