FEATURES

Replaces two modems in point-to-point applications.

Speeds up to 38.4 kbps.

Small and lightweight. Easy to install or replace in the field.

LEDs show DSR, CTS, and TXD for both ports.

Front-panel switches set signals and select test mode.

Operates transparently, sync or async.

IBM compatibility at two different speeds. Runs sync or async, too!

SME-4M

(ME251A-R3)

IBM®

RS-232 Cable

RS-232 Cable

S/3X or

mainframe

(ECM25C)

(ECM25C)

AS/400® host

OVERVIEW

The Synchronous Modem Eliminator (SME-4M) enables a mainframe or minicomputer to communicate locally with another mainframe, minicomputer, or remote controller.

And best of all, it saves you money because the SME-4M replaces the two modems or line drivers normally needed for such communication.

Just one versatile SME-4M enables asynchronous, synchronous, or bisynchronous communications between two DTEs over RS-232C cable.

In synchronous mode, the unit operates at data rates that top out at 38.4 kbps. Plus the SME-4M operates transparently in either synchronous or asynchronous mode. You can also configure the SME-4M to operate at some nonstandard data transmission speeds. To set the SME-4M for one of these speeds, configure the unit according to the chart on the right.

The SME-4M is small and lightweight, so it’s easy to handle. And because no special tools are needed, installation is simple.

The modem eliminator’s front panel has six LEDs and three switches. The six LEDs indicate Clear To Send (CTS), Transmitted Data (TXD), and Data Set Ready (DSR) for each port. The three switches include Ring Indicator (RI) and Control Data Set Ready (CON) signals, and (LB) selects the Digital Loopback Test Mode.

Use the SME-4M’s diagnostic loopback capability to test asynchronous applications. Simply press the switch and enter data at the host terminal or computer. That data should return to you exactly as you sent it.

The unit fits neatly on a desktop. Each SME-4M is shipped with a 115-VAC power transformer and a user’s manual.

Buyer’s Guide

Transmission Speeds

Strap Position

 

Transmission Rate (bps)

a

 

76,800

b

 

153,600

38,400

 

38,400

19,200

 

19,200

9600

 

9600

4800

 

4800

2400

 

2400

1200

 

1200

Crystal Frequency

 

2.4576 MHz

 

 

 

2/22/2007

724-746-5500

blackbox.com

#10205

 

 

2 of 3

Page 2
Image 2
Black Box SME-4M manual Features, Overview, Buyer’s Guide, Transmission Speeds

SME-4M specifications

The Black Box SME-4M is a powerful and versatile multimedia switching solution tailored for various professional environments. Designed to meet the demands of modern AV applications, the SME-4M excels in handling high-resolution video and audio signals, making it a valuable asset for businesses, education, and entertainment sectors.

One of the main features of the SME-4M is its capability to support multiple input and output configurations. With four HDMI inputs and multiple output options, users can effortlessly switch between various sources, such as computers, cameras, and media players, without compromising signal integrity. This flexibility is particularly advantageous in conference rooms, classrooms, and live event settings, where multiple devices often need to be connected simultaneously.

The SME-4M incorporates advanced video processing technologies, ensuring quality performance. It supports 4K resolutions at 60 Hz, allowing users to display high-definition content seamlessly. This capability is essential for delivering crystal-clear presentations and engaging visual experiences. Furthermore, the device supports various video formats and color spaces, accommodating a wide range of media types.

In addition to its impressive video capabilities, the SME-4M also prioritizes audio performance. With built-in audio extraction and mixing capabilities, users can transmit high-quality audio alongside video, simplifying the setup for presentations and events. The audio functionality supports diverse audio formats, ensuring that sound quality complements the visual experience.

Another key characteristic of the SME-4M is its user-friendly interface. The device offers both physical buttons and a web-based management tool for easy control. This dual interface allows users to make quick adjustments and configurations, enhancing operational efficiency. The web-based tool also provides remote access capabilities, enabling administrators to monitor and control AV systems from any location.

Reliability is a crucial factor for any AV solution, and the SME-4M delivers in this aspect with robust build quality and dependable performance. Its design incorporates thermal management features to ensure consistent operation without overheating, which is essential during extended usage.

In conclusion, the Black Box SME-4M is a comprehensive multimedia switching solution equipped with advanced features, cutting-edge technologies, and user-friendly controls. Its compatibility with 4K resolutions, combined with versatile audio capabilities and reliable performance, makes it an ideal choice for any professional AV setup. Whether used in corporate settings, educational facilities, or live events, the SME-4M stands out as a powerful tool that enhances the overall audio-visual experience.