1.0 Description

The Model 214 Fastwire Short Haul Modem allows for full duplex transmission up to 38.4 KBPS over a single twisted pair. Transmission over the twisted pair is made possible through on board adaptive echo cancellation that allows the units to differentiate between incoming and outgoing data.

2.0 Specifications

2.1 Interface : RS-232-CCITT V.24 : Pins 2 & 3 transmit and receive data, switch selectable. Pin 1, Frame Ground. Pin 7, Signal Ground. Pins 4 & 5 are connected together as well as pins 6, 8, and 20.

2.2 Transmission Format : Asynchronous, full duplex

2.3 Data Rate : .3 to 38.4 KBPS

2.4 Transmission Controls : CTS (Pin 5) turns ON immediately after the terminal raises RTS (Pin 4.) DSR (Pin 6) and DCD (Pin 8) turn ON immediately after the terminal raises DTR (Pin 20.)

2.5 Transmission Mode : Full Duplex, 2 wire

2.6 Transmission Line : 2 wire, unconditioned line (1 twisted pair.)

2.7 Transmit Level : 1.5mW across 120 Ohms.

2.8 Transmission Distance :

2.9 Connector
RS-232 : 214AM = DB-25M; 214AF = DB-25F
Line : Screw terminals and RJ-11 jack
Power : 3.5 mm

2.10 Power : The Model 214A is powered via a wall mounted DC power pack.

2.11 Indicators : Ready LED - indicates when there is a valid connection between the two units.

2.12 Switches DTE/DCE - allows reversing of Pins 2 and 3.
Master/Slave - One unit is set for Master while the other unit is configured as a Slave.

2.13 Size : 2" W x 3.5" L x .875"H

2.14 Environmental Ranges : 0° to 50° C, 0 to 95% RH non-condensing.

3.0 Installation

3.1 Digital Interface : The Model 214 can be ordered with either a male or female DB-25 connector. A Model 214AM comes equipped with a DB-25 male connector while the 214AF is equipped with a DB-25 female connector.

3.2 Analog Interface : The analog interface features 2 screw terminals marked + & - and a RJ-11 modular phone jack. When connecting the 2 units together the + on one unit goes to the + on the other unit and the - to the -. The cable used should be high quality twisted pair and color coded to facilitate installation and repair. The phone plug configurations are shown below.

4.0 Operation The Model 214 comes equipped with 2 switches, DTE/DCE and Master/Slave, and a LED marked "READY."

4.1 DTE/DCE : The DTE/DCE allows the user to reverse Pins 2 & 3 on the RS-232 side. When connecting to a device that uses Pin 2, Transmit Data, as an output, such as a terminal or PC, then set the Model 214 for DCE. When connecting to a device that uses Pin 3, Receive Data, as an output, a dial up modem for example, then set the Model 214 for DTE.

4.2 Master/Slave : When two Model 214's are operating on a link one unit must be switched to Master and the other switched to Slave.
4.3 Ready LED : Once the transmission line connections are made, as described in Section 3.2, the Ready LED will turn ON. This LED informs the user that the link between the 214's is established and both modems are operational.

5.0 Troubleshooting

Proper operation of both units can be determined through the Ready LED. Once the LED is illuminated, proper communication between the two units has been established and the units are ready for operation. If the LED does not come on one of the following could be at fault.

1. No power - transformer defective or not plugged in.
2. Connections at screw terminals or RJ-11 are not correct.
3. Break in connecting cable.
4. Master/Slave switch not set properly (Sec 4.2).
5. Defective unit.

6.0 Connector Pin Assignment

7.0 Power

The Model 214's operating power is derived from a small wall mounted transformer DC power pack supplying 9 VDC at 200 mA.

8.0 Help

Assistance can be obtained by visiting our Technical Support Center.
 

Warranty

Telebyte warrants the equipment to be free from defects in material and workmanship, under normal and proper use and in its unmodified condition, for 12 months, starting on the date it is delivered for use. TELEBYTE's sole obligation under this warranty shall be to furnish parts and labor for the repair or replacement of products found by TELEBYTE to be defective in material or workmanship during the warranty period. Warranty repairs will be performed at the point of manufacture. Equipment approved for return for warranty service shall be returned F.O.B. TELEBYTE factory and will be redelivered by TELEBYTE freight prepaid, except for non- continental U.S.A. locations. These deliveries will be sent COD freight and import/export charges.

THE ABOVE WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, STATUTORY OR OTHERWISE, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. TELEBYTE SHALL NOT BE LIABLE FOR ANY DAMAGES SUSTAINED BY RESELLER OR ANY OTHER PARTY ARISING FROM OR RELATING TO ANY EQUIPMENT FAILURE, INCLUDING, BUT NOT LIMITED TO CONSEQUENTIAL DAMAGES NOR SHALL TELEBYTE HAVE ANY LIABILITY FOR DELAYS IN REPLACEMENT OR REPAIR OF EQUIPMENT.

Out of warranty equipment may be returned to the Greenlawn, NY customer service facility prepaid as described above. Return shipping charges will be billed to the customer. The repaired unit will have a 90 day warranty. In those cases where "NO TROUBLE" is found, a reduced charge will be billed to cover handling, testing and packaging.

Whether in or out of warranty a Return Material Authorization number (RMA) is necessary.  Assistance can be obtained by visiting our Technical Support Center.

Document No. 0315-0090/Rev. C