RS-232 Multiplexer, Statistical Multiplexers from Data Comm for Business, Inc.

The SR series statistical multiplexers concentrate 1,4, 8, 16, 24 or 32 asynchronous channels over a synchronous or asynchronous composite. "One Touch Dial" mode is included for satellite modems or dial-up modem links. With "One Touch", the SR uses a dial-up modem. At the touch of a single key (space bar or enter key), any terminal connected to the SR multiplexer initiates a call. The SR is on line in just a few seconds. If the link is idle for a user settable time ranging from 1 minute to 99 minutes, the SR automatically disconnects the connection, saving costs where charges are time metered.

All port parameters are set with an asynchronous terminal (or PC) connected to the network management port or port 1. Set-up procedures are menu driven and fully explained on screen. All configuration parameters are maintained through power outages.

The asynchronous ports can be individually set for speeds to 38.4 Kbps (57.6 Kbps on the SR-01 and SR-04). Hardware (CTS/Busy high or low) or software (Xon/Xoff even, odd, mark, space or transparent) flow control is also set on a port by port basis. Flow control is transmitted across the link.

The SR multiplexer composite is synchronous or asynchronous full duplex lines either analog or digital. The composite can be run at speeds up to 128 Kbps sync, 115.2 Kbps async.

The network management port includes local and remote configuration commands. The Show Configuration Commands allow the system manager to view the configuration settings of both the local and remote SR Multiplexers. Network management features include port and composite loopbacks, capture of a remote or local port, send a test message to an individual local or remote port, set multiplexer ID for node identification and a built-in "data line monitor" which allows the monitoring of the transmit or receive lines at the local multiplexer. A unique feature of the SR multiplexers is the Copy Command. This command allows a trainer at the host site to "copy" any local or remote port to view exactly what the user is entering. This feature can save thousands of training dollars by eliminating travel expenses.

The SR multiplexer has a side panel access for firmware cartridge installation. This feature simplifies installation of upgrades for new features and functions.

The SR multiplexers are compatible with all async protocols for machine-to-machine or host computer-to-remote links. It transfers all binary characters transparently. In addition, with features like the loopback, test message, ID, monitor and copy commands, you can take charge of your network like never before.

The single port SR multiplexer is quite useful for multi-drop and multi-point applications such as point-of-sale terminals, SCADA, and other machine control applications or where it is desireable to transfer RS-232 control leads across a data connection that doesn't transport transport them natively.
The internal modem is available in a V.90 version. With the internal modem, multiplexer management commands provide direct access to the modem, and provide a command string to be sent to the modem after every power on. These units can also be configured for the "one-touch" operation, whereby a link is dialed up by simply touching the space bar on ANY terminal connected to the multiplexer. The modem initialization command insures reliable modem operation. Using the internal modem removes many of the dial-up problems cause by unknown bargin-store quality modems.

SR-04	4 Port Host or Remote Multiplexer	$ 775
SR-01	1 Port Asynchronous Multiplexer	$ 500
SR-01/DSU	1 Port Asynchronous Multiplexer with built-in 56Kbps DSU	$ 825
SR-08	8 Port Host or Remote Multiplexer	$ 1,350
SR-16	16 Port Host or Remote Multiplexer	$ 2,100
SR-24	24 Port Host or Remote Multiplexer	$ 3,000
SR-32	32 Port Host or Remote Multiplexer	$ 3,800
SR-V92	V.92 Internal Modem	$ 325
SR-08-EC	8 Port expansion kit	$ 1,300
SR-FR	Frame Relay firmware (Free when ordered with unit)	$ 500
SR-DSU04	Integral 56/64Kbps DSU/CSU for SR-04	$ 325
RK-8/16	Rack mount for 8/16 port unit	$ 60
RK-24/32	Rack mount for 24/32 port unit	$ 75



Data Comm for Business Inc. 2949 County Road 1000 E Dewey, Il 61840	Voice: 217-897-6600 Toll Free: 800-4-DCB-NET Toll Free: 800-432-2638	Email: Contact Page Web: www.dcbnet.com Fax: 217-897-8023
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SR Statistical Multiplexer

Statistical Multiplexer, 1 to 32 channel for Leased, Radio, Satellite, and Dial-up Lines

DESCRIPTION

SPECIFICATIONS

General

Port Specifications

Network Specifications

Operating Modes

Indicators (front panel)

Network Management Port

Network Management Port Commands

Physical/Electrical

Options

APPLICATION

How to Order

HOST or REMOTE:


8/16/24/32 Port Model SR-08, SR-16, SR-24, SR-32	4 Port Model SR-04