Instruction/ maintenance manual of the product RSD-20 RAD Data comm
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RSD-20 High Speed Digital Sharing Device Installation and Operation Manual Notice This manual contains information that is proprietary to RAD Data Communications. No part of this publication may be reproduced in any form whatsoever without prior written approval by RAD Data Communications.
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'HFODUDWLRQRI&RQIRUPLW Manufacturer’s Name: RAD Data Communications Ltd. Manufacturer’s Address: 12 Hanechoshet St. Tel Aviv 69710 Israel declares that the product: Product Name: RS.
TABLE OF CONTENTS 1 INTRODUCTION 1 . 1 G e n e r a l ... ........ ........ ........ ........ .... 1 . 1 1 . 2 F u n c t i o n a l D e s c r i p t i o n ........ ........ ........ ........ 1 . 1 1 . 3 S p e c i f i c a t i o n s ...... .......... .....
1 INTRODUCTION 1.1 GENERAL The RSD-20, Hi gh Speed Digital Shar ing Device, enables up to four high speed m odems, terminals or c ontrollers to shar e a master modem, a mul tiplexer or a computer por t in a multipoint envi ronment. The R SD-20 is compa tible with synchronous equi pment at data rat es of 48, 56, or 64 kbps, with V.
1.3 SPECIFICATIONS Number of S ub-channels Four Channel Configu ration Lowest priority: Sub-channel 1 Highest pri ority: Sub-channel 4 Sub-channel Select ion Strap-select able to: Control sign al RTS/DCD (V.35) or CONT/IND (X.21) ON Data transit ions Sub-channel Deselection RTS/DCD (V.
Indicators DATA: Display data br oadcast fr om main channel to sub- channels ACTIVITY: 4 LEDs indicat e which sub-cha nnel has gained access to main cha nnel DISABLE: 4 LEDs indicate if sub-channel has been disa bled automatica lly ON: RSD pow er is on Power 115/230 VAC swi tchable; 10%; 47- 63 Hz; 10 W Physical Height: 44 mm / 1.
2 INSTALLATION Access inside the equipment is only per mitted to author ized service personnel. 2.1 GENERAL This chapte r provides inf ormation on pe rforming the mechanica l and electrical i nstallation of the RSD- 20.
2.4.2 Rear P anel Six connectors ar e located on the rear panel of the RS D-20, consisting of fi ve channel connectors (four f or the sub-channels and one f or the main channel) and one 3-pin pow er connector, whi ch also includes the fuse holder. Th e five channel connectors ar e 34-pin connectors for the V.
RSD-2 0 OPER ATOR' S MANU AL INSTAL LATION 2.3.
INSTAL LATION RSD-2 0 OPERATO R'S MANU AL 2.4.
2.5 SYSTEM SYNCHRONIZATION AND CLOCK DISTRIBUTION 2.5.1 RSD-2 0/V.35 Four alternatives are available for synchronization of the system: a) Main channel modem timing signa ls. b) RSD-20 int ernal clock. c) Sub-channel 1 modem timing signal s. d) Any sub-channel modem timing signals.
2.5.1.2 Sync hronization on RS D-20 Inter nal Clock a) RSD-20 baud rat e should be strapped to the requir ed speed. b) DCEs attached to sub- channels should be strapped to external clock. c) DCE attached to main channel should be str apped to external clock.
2.5.1.3 Sync hronization on Sub-channe l 1 a) RSD-20 baud rat e should be strapped to CLK- 1. b) DCE attached to main channe l should be strapped to exter nal clock.
2.5.1.4 Ext ernal Clock for more than one Sub-c hannel This option enables connect ion of more than one sub-chann el to the line from the P.T. T. service. Generally, the P .T.T. modems supply clock to every line – i.e. the P.T.T. has to provide t he clock.
2.5.2.4 Main c hannel is DCE and sub-c hannels are mixed (DTE and DCE) In this mode one of the modem s attached t o the sub-channel s (configured as DTE ) should be attached t o sub-channel 1, and t he RSD baud rate should be st rapped to CLK-1.
3 OPERATION 3.1 GENERAL This chapte r details th e RSD-20 controls and indicators, their function s, and oper ating procedures. The installation procedure s given in Chapter 2 must be complet ed and checked before operation of the RSD-20 is attempte d.
Table 3. 1 Control Fun ctions Control Location Function Power switch (with lamp ) ON/OFF Rear Panel Turns AC power ON or OFF 110/220 VAC Selecto r Rear Panel Selects main powe r source: 115 or 230 VAC Four manual DISABLE push-button switches Front Panel Manually deacti vates sub-channels connected to defective termi nals or modems.
3.4 OPERATIONAL FIELD STRAPPING CHANGES Access inside the equipment is only per mitted to author ized service personnel. If it becomes necessary to reconf igure the RSD- 20 for a different type of operati on, the internal straps must be ch anged to correspond to the new oper ating mode.
4 THEORY OF OPERATION AND APPLICATIONS 4.1 INTRODUCTION This chapter contains a simplified functional d escription of the RS D-20, and cover s the flow of data, contr ols and clocks in all RSD- 20 operating modes. 4.2 CONTENTION RTS/DC D contention in V.
4.4 CONTROL SIGNALS Sub-channel control s ignals are c ombined to p rovide a com posite signal to the main channel. Control s ignals from th e main channel are passed t o all sub-channel s in parallel. The following are det ails of control signals: 4.
4.4.2.2 RS D-20/X. 21 CONTROL/INDICATION If the “ C/I to Sub-channel ” jumper is in t he “ MAIN CHANNEL ” state, the C /I to sub-channel follows the main C/ I (unless the sub-channel is disabled, t hen the C/I is OFF).
THEORY OF OPERATION AND APP LICATIONS RSD-20 OPERATOR'S MANUA L 4.3.
Figure 4. 1 Main Chan nel DTE with Sub-ch annel DCE Figure 4. 2 Main Channel DCE with Sub-channel DTE RSD-20 OPERATOR'S MA NUAL THEORY OF OPERATIO N AND APPLICATIONS 4.
Figure 4.4 Main channel DCE w ith Sub-channel DCE Figure 4.3 Main channel DTE wi th Sub-channel DTE THEORY OF OPERATION AND APP LICATIONS RSD-20 OPERATOR'S MANUA L 4.
4.5 APPLICATIONS The RSD-20 operat es in one of six modes: modem sharing, port shari ng, remote port shar ing, local port sharing, mix mo dem sharing and mix port sharing. S ystem configurati ons incorporating the RSD- 20 in each operating mode are describ ed in Figure 4.
APPENDIX A Table A.1 X21 Interface Si gnal Descripti on X.21 SIGNAL NAME PIN SHIELD 1 G GROUND 8 T TRANSMIT 2 9 R RECEIVE 4 11 CC O N T R O L 3 10 I INDICATION 5 12 S SIGNAL TIMIN G 6 13 - EXTERNAL CL.
APPENDIX B Table B.1 V.35 I nterface Signa l Descripti on V.35 Signal Function 34-pin Stand-Alone Pin Circu it Protective Ground A Frame 101 Signal Ground B Signal GND 102 Transmit ted Data S TD(B ) 1.
An important point after buying a device RAD Data comm RSD-20 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought RAD Data comm RSD-20 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data RAD Data comm RSD-20 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, RAD Data comm RSD-20 you will learn all the available features of the product, as well as information on its operation. The information that you get RAD Data comm RSD-20 will certainly help you make a decision on the purchase.
If you already are a holder of RAD Data comm RSD-20, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime RAD Data comm RSD-20.
However, one of the most important roles played by the user manual is to help in solving problems with RAD Data comm RSD-20. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device RAD Data comm RSD-20 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
