FLM-2. 6/12 PORT LOCAL MULTIPLEXER Installation and Operation Manual. Notice

Transcription

1 FLM-2 6/12 PORT LOCAL MULTIPLEXER 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. No representation or warranties for fitness for any purpose other than what is specifically mentioned in this manual is made either by RAD Data Communications or its agents. For further information contact RAD Data Communications at the address below or contact your local distributor. RAD data communications Headquarters 12 Hanechoshet Street Tel Aviv Israel Tel: Fax: RAD data communications US East 900 Corporate Drive Mahwah, NJ USA Tel: (201) Fax: (201) RAD data communications US West 3631 South Harbor Boulevard Suite 250 Santa Ana, CA Tel: (714) Fax: (714) RAD Data Communications Publication No /98

2 Warranty This RAD product is warranted against defects in material and workmanship for a period of one year from date of shipment. During the warranty period, RAD will, at its option, either repair or replace products which prove to be defective. For warranty service or repair, this product must be returned to a service facility designated by RAD. Buyer shall prepay shipping charges to RAD and RAD shall pay shipping charges to return the product to Buyer. However, Buyer shall pay all shipping charges, duties and taxes for products returned to RAD from another country. Limitation of Warranty The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by Buyer, Buyer-supplied firmware or interfacing, unauthorized modification or misuse, operation outside of the environmental specifications for the product, or improper site preparation or maintenance. Exclusive Remedies The remedies provided herein are the Buyer s sole and exclusive remedies. RAD shall not be liable for any direct, indirect special, incidental, or consequential damages, whether based on contract, tort, or any legal theory. Safety Warnings The exclamation point within a triangle is intended to warn the operator or service personnel of operation and maintenance factors relating to the product and its operating environment which could pose a safety hazard. Always observe standard safety precautions during installation, operation and maintenance of this product. Only a qualified and authorized service personnel should carry out adjustment, maintenance or repairs to this instrument. No adjustment, maintenance or repairs should be performed by either the operator or the user. Telecommunication Safety The safety status of each of the ports on the FLM-2 is declared according to EN and is detailed in the table below: Ports Safety Status DTE SELV Circuit operating with Safety Extra-Low Voltage 4W TNV-1 Circuit whose normal operating voltage does not exceed the limits of SELV, but is subject to overvoltages from Telecommunications Networks.

3 Regulatory Information FCC-15 User Information This equipment has been tested and found to comply with the limits of the Class A digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to the radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense. Warning per EN This is a Class A product. In a domestic environment, this product may cause radio interference, in which case the user may be required to take adequate measures.

4 Declaration of Conformity Manufacturer s Name: Manufacturer s Address: RAD Data Communications Ltd. 12 Hanechoshet St. Tel Aviv Israel declares that the product: Product Name: FLM-2 Conforms to the following standard(s) or other normative document(s): EMC: EN (1994) Limits and methods of measurement of radio disturbance characteristics of information technology equipment. EN (1992) Electromagnetic compatibility - Generic immunity standards for residential, commercial and light industry. Safety: EN (1992/93) Safety of information technology equipment, including electrical business equipment. Supplementary Information: The product herewith complies with the requirements of the EMC Directive 89/336/EEC and the Low Voltage Directive 73/23/EEC. The product was tested in a typical configuration. Tel Aviv, October 29th, 1996 Haim Karshen VP Quality European Contact: RAD Data Communications GmbH, Lyoner Strasse 14, Frankfurt am Main, Germany

5 TABLE OF CONTENTS P a r a g r a p h C H A P T E R 1 - I N T R O D U C T I O N GENERAL 6 FUNCTIONAL DESCRIPTION 6 T E C H N I C A L S P E C I F I C A T I O N S 7 ORDERING INFORMATION 9 APPLICATIONS 1 0 C H A P T E R 2 - I N S T A L L A T I O N 2. 1 SITE PREPARATION 2. 2 S E T - U P 2. 3 E L E C T R I C A L I N S T A L L A T I O N CHAPTER 3 - OPERATION 3. 1 GENERAL CONTROLS AND INDICATORS OPERATING PROCEDURE SYSTEM TESTS FAULT ISOLATION AND TROUBLESHOOTING 2 1

6 -5- Figures Figure l-l Typical Point-to-Point Installation 11 l-2 Typical Ring Installation 11 2-l Strapping Diagram Rear Panel Description Connecting Channel Doubler to Sub-Channels 17 3-l Front Panel Description 16 Table Tables l-l l Performance vs Modes of Operation 7 Sub-Channels Connector 16 Fault Isolation and Troubleshooting 21

7 -6- CHAPTER 1 - INTRODUCTION 1.1 GENERAL The FLM-2 is a full duplex time division synchronous/asynchronous multiplexer enabling up to 12 terminals to be multiplexed onto a single channel. A maximum number of 3 channels can be chosen to operate either synchronously or asynchronously, while the remaining 9 channels operate asynchronously. 1.2 FUNCTIONAL DESCRIPTION The multiplexer has 6 sub-channels expandable to 12 via channel doubler cables. Various configurations are possible to suit the specific needs of the user: (a) Up to six async data channels with one control signal per channel at data rates up to 19,200 bps; (b) Up to six async data channels without control signals at rates up to 38,400 bps; (c) Up to six data channels, three of which operate synchronously at rates up to 19,200 bps and remaining channels operate asynchronously at rates up to 38,400 bps; (d) Up to 12 data channels at rates up to 19,200 bps, three of which operate synchronously, and remaining channels operate asynchronously. These configurations are field selectable by the user with rate switches and straps located on the main board. Three media options for the main channel interface are offered: (a) Electrical version - 4-wire for transmission over two twisted pairs; (b) Optical version - dual fiber; (c) Optical version single fiber Selection of options is made upon ordering. Asynchronous multiplexing is implemented using an over-sampling technique. Each one of the 12 channels is sampled at 76.8 kbps rate in the electrical option while in the optical option the rate of sampling is doubled. Table l-l summarizes the performance at various options and modes of operation. Note: Whenever possible (i.e. number of channels is up to 6), it is advisable to operate the FLM in the 6-channel mode, which results in less distortion.

8 Table 1-1: Performance at Various Modes of Operation Total No. of Max No. of Sub-Channels Sub-Channels in use Async Sync Data Rate Distortion (%) Controls per (Kbps) (Async Channels)* sub-channel Async Sync Electrical Optical * REMARK: For all modes of operation, synchronous channels distortion is 0.0 %. 1.3 SPECIFICATIONS Sub-Channels Transmission Format: Asynchronous on all channels, Synchronous on channels 1-3 only Data Rate: -Up to 38.4 kbps in asynchronous mode optical version -Up to 19.2 kbps in asynchronous mode electrical version -1.2, 2.4, 4.6, 9.6 or 19.2 kbps user selectable in synchronous mode Transmit Clock Source: Internal, External or Received Interface: EIA RS-232-C/CCITT V.24 Connectors: 6 D-type 25-pin female Number of Sub-channels: Up to 12 by attaching a channel doubler to each of the connectors (see ordering). Mode of Operation: Full duplex Main Channel I ) Electrical Interface Transmission Line: Operating Range: Data Rate: Output format: Input Resistance: Connector: 4-wire unconditioned telephone lines (two twisted pairs) Maximum of 1.6 km (1 mile) on 22 AWG cable Mbps Balanced, transformer 6 Vp-p (on 100 Ohms) 100 Ohms Terminal block

9 -8- II) Optical Interface (Dual Fiber) Transmission Line: Dual fiber optical cable Transmission Mode: Full duplex Operating Range: 5 km (3.2 miles) Data Rate: Mbps Operating Wavelength: 820 nanometers Optical Output Level: -23 dbm min into 50/125 G.I. fiber -16 dbm min into 100/140 G.I. fiber Receiver Sensitivity: -40 dbm min Dynamic Range: 24 db minimum Fiber Optic Interface: Standard SMA type optical connectors III) Optical Interface (Single Fiber) Transmission Line: Transmission Mode: Operating Range: Data Rate: Operating Wavelengths: Optical Output Level: Receiver Sensitivity: Dynamic Range: Fiber Optic Interface: Single fiber optical cable Full duplex 5 km (3.2 miles) Mbps 730/865 nanometers -26 dbm min into 50/125 G.I. fiber -18 dbm min into 100/14O G.I. fiber -38 dbm min 20 db minimum Standard SMA type optical connector General Diagnostics Local digital loopback Remote digital loopback Switches/Indicators Power Indicator (Green) Test Indicator (Ye1 low) Local Sync Loss Indicator (Red) - On when unit is powered - On when local or remote unit is performing a loopback - On when synchronization is lost at local unit Remote Sync Loss Indicator (Red) - On when synchronization is lost at remote unit LLB Switch - When depressed, unit is performing local loopback RLB Switch - When depressed, unit is performing remote loopback

10 -9- Physical Description I The FLM-2 is available as a compact stand alone (desk top) unit or as a rack-mount unit for a 19 rack FLM-2SA (Stand Alone Version) Height : 4.4 cm / 1.75 in (1U) Width: Depth: 33.8 cm / in 20.0 cm / 7.90 in Weight : 1.6 kg / 3.5 lb FLM-2R (19 Rack Version) Height: 4.4 cm / 1.75 in (1U) Width: 48.2 in / in Depth: 20.0 cm / 7.90 in Weight: 1.75 kg / 3.85 lb Environment Temperature: Humidity: Up to 95% non-condensing Power 115/230 VAC 10% Hz 8.5 VA Max 1. 4 ORDERING INFORMATION FLM-2SA/*/+ Stand Alone Unit FLM-2R/*+ 19 Rack Mountable Unit * Specify: 4W For Four Wires main channel interface DF For Dual Fiber Optical main channel interface SF-L For Single Fiber Optical main channel interface transmitting at 730 nm SF-H For Single Fiber Optical main channel interface transmitting at 865 nm (please note that Single Fiber link requires two different units: SF-L and SF-H) + Specify: 115 For 115 VAC Power Supply 230 For 230 VAC Power Supply CD Channel doubler cable, used to connect two data channels to a, single 25 pin connector

11 APPLICATIONS The FLM-2 primary application is for point-to-point configurations where distances of up to several kilometers are involved. A typical application is demonstrated in Figure l-l where a cluster of terminals are connected to a host computer through a single link. For installations involving clusters of terminals distributed in several locations, the FLM-2 units may be installed in a ring-type configuration as shown in Figure 1-2. At each site, the unconnected channels must be bypassed by shorting pin 2 to pin 3 of the relevant sub-channels connector. While operating synchronously, if a bypass is needed for channels 1, 2 or 3. the TC source in the bypassed unit should be placed in RX mode. (Refer to Par ). Not more than two adjacent units should operate in the RX mode. This configuration does not apply to the single-fiber version.

12 Figure l- l: Typical Point- to- Point Installation ASYNC ASYNC ASYNC S Y N C S Y N C S Y N C Figure l- 2: Typical Ring Installation

13 CHAPTER 2 - INSTALLATION 2.1 SITE PREPARATION The FLM-2 is installed within 1.5 m (5 feet) of a grounded AC outlet. Any adjustment, maintenance or repair of the opened instrument under voltage should be avoided. If necessary, these repairs should be carried out only by a skilled technician who is aware of the hazards involved. 2.2 SET-UP Any access inside the equipment is only permitted to authorized and qualified service personnel. Four set-up procedures prior to operation are needed: the number of channels available, synchronous channels data rates, TC source and the grounding: Number of Sub-Channels Refer to figure 2-1; unscrew the two upper cover screws located at the back of the unit, slide the upper cover backward and locate the strap marked - select 6 or 12 channels with an arrow. For up to 6 channels with no controls applications, place the strap between center pin, and the one marked 6 for any other applications place it between the center pin and the one marked Synchronous Data Rates Refer to figure 2-1; locate the three data-rate rotary switches marked "CH.1, CH.2, CH.3 as well as the rate table which is located on the left. If the synchronous option is not needed, set the three switches to positions 5, 6 or 7 (Asynchronous mode) according to the rate table. If any of the channels 1 to 3 are to operate synchronously. their corresponding switch must be rotated to the appropriate data-rate position according to the rate table TC Source Refer to figure 2-1; locate the strap marked TC SOURCE. - For normal synchronous operation, i.e. Transmit Clock is generated internally, place the strap below the IN marking. - If loopback timing is needed, i.e. TC is synchronized to the Received Clock, place the strap below RX marking. - If the External Clock is provided by the D.T.E. via RS-232 Pin 24, place the strap below the EX marking. Only channel 1 can accept the External Clock.

14 Grounding Refer to Figure 2-1; locate the strap marked "GND" According to your requirements, select the signal ground to be connected to shielding (chassis) ground or to be disconnected from it. Slide upper cover back to its place, and fasten the screws. Figure 2-1: Strapping Diagram I. The safety status of the UW ports is TNV operating in the limits of SELV. If the UW network does not fulfill this requirement, the signal ground must be connected to the chassis ground.

15 ELECTRICAL INSTALLATION Refer to Figure 2-2: Rear Panel Description for the following: AC Power AC power is supplied to the FLM-2 through. a 1.5 m (5 feet) cord terminated by a grounded 3-wire plug. The AC cord is fused at the rear panel AC power receptacle of the unit A 0.1A Slow-Blow fuse is required for 230V operation and a 0.2A fuse is required for 115V operation Sub-channels 6 D-type 25-pin female connectors located on the rear panel enable the end users to be connected to the unit. Detailed information about the signals present at these connectors is given in Table 2-1. For operation with more than 6 channels, channel doublers (CD) are required. Electrical drawing of the CD is given in Figure Main Channel 4-wire version A 5-screw terminal block is located at the rear panel, marked TX-A, TX-B, CHASSIS GND, RX-A, RX-B for connecting transmit and receive wires and the cable shield (if available). TX at the local unit must be connected to RX at the opposite unit. Dual fiber version Two SMA connectors are present on the rear panel, marked TX and RX. Remove protective caps from connectors and keep them in a safe place for later use. It is recommended to apply some Freon spray to both TX and RX connectors in order to clean optical surfaces from possible dust coat due to shipment. Connect transmit fiber to SMA marked TX, receive fiber to SMA marked RX and secure fastening nuts tightly. At the remote unit, the transmit fiber must be connected to RX and the receive fiber to TX. Single fiber version One SMA connector is located at the rear panel, marked TX/RX. Remove protective cap from connector and keep it in a safe place for later use. It is recommended to apply some Freon spray to the SMA connector in order to clean optical surface from possible dust coat due to shipment. Next, connect fiber to SMA, and secure fastening nut tightly. Apply the same procedure at the remote unit.

16 a. FLM-2/DF Rear Panel b. FLM-2/SF Rear Panel C. FLM-2/4W Rear Panel Figure 2-2: Rear Panel Description

17 Table 2-l: Sub-Channels Connector Pin Assignment CCITT EIA PIN V.24 RS-232-C NO. 101 AA 1 SIGNAL NAME Protective Ground DESCRIPTION Chassis ground. May be isolated from Signal Ground (refer to para ) 102 AB 7 Signal Ground 103 BA 2 (14) Transmit Data 104 BB 3 (16) Receive Data 105 CA 4 (19) Request to Send 106 CB Clear to Send 107 cc 5 (13) 6 (21) Data Set Ready Common signal and DC power supply ground. Serial digital data from a terminal or other source into the FLM. Serial digital data output from the FLM. A positive level to the FLM when data transmission is desired. A positive level from the FLM-2 (if data transmission is possible). A positive DC voltage (+8V) from the FLM-2 indicating the unit is powered. 109 CF 8 (12) Receive Line Signal Detector (Carrier Detect) A positive level from the FLM except when either a sync loss occurs or remote i s performed volts volts These signals are reserved for data set testing and f o powering miniature modems DA 24 External Clock DB 15 Transmit Clock Available only for channel 1. Clock input from a terminal or other source to FLM for synchronous transmission. Available only for 1 to 3. Clock output from FLM for synchronous transmission. channels DD 17 Received Clock Available only for channel: 1 to 3. Clock output from FLM for synchronous reception. Note: Pin numbers in parenthesis represent secondary channel available when using channel doubler cable.

18 Channel Doubler Cable Port A To Terminal A TO FLM-2 Connector Port B To Terminal B Figure 2-3: Connecting Channel Doubler to FLM-2 Sub-Channel

19 CHAPTER 3 - OPERATION 3.1 GENERAL This chapter contains a list of controls and indicators together with their functions; an operating procedure covering power turn-on, operating instructions, and power turn-off; information on strapping; and a unit system test procedure for use by the operator and technician. Installation procedures given in Chapter 2 must be completed and checked before attempting to operate the FLM CONTROLS AND INDICATORS Figure 3-1: Front Panel Description The front panel is shown on Fig. 3.1 are described hereafter: and switches and indicators functions Switches LLB Switch When depressed (pushed in), the unit is performing Local Loopback. RLB Switch When pushed in, the unit is performing Remote Loopback. Note: Pushing in both switches simultaneously is an illegal operation disregarded by the unit, resulting in normal operation. Indicators Power Indicator Test Indicator Local Sync Loss Remote Sync Loss Green LED lights when power is present Yellow LED lights when either local or remote unit is performing a test. Red LED lights when synchronization is lost at the local unit. Red LED lights when synchronization is lost at the remote unit.

20 OPERATING PROCEDURE WARNING BEFORE SWITCHING ON THIS INSTRUMENT, the protective ground (earth) terminals of this instrument must be connected to the profebtive ground conductor of the (mains) power cord. The mains plug shall only be inserted in a socket outlet provided with a protective ground (earth) contact. The protective action must not be negated by use of an extension cord (power cable) without a protective ground conductor Make sure that only fuses with the required rated current and of the specified type (normal blow; time delay; etc) are used for replacement. The use of repaired fuses and the short-circuiting of fuse holders is forbidden. An extra fuse is normally supplied with the instrument. Whenever it is likely that the protection offered, by fuses has been impaired, the instrument must be made inoperative and be secured against any unintended operation. Power Turn-On Apply AC power by connecting the AC power cord to an acceptable AC source. Lighting up of the Power LED indicates that the FLM-2 is powered. If the local and remote FLM-2 units are in operation and properly connected via the main channel, no other LED should be ON. If another condition exists, please refer to para Operation The FLM-2 operates entirely unattended except when performing system tests. Power Turn-Off To turn off FLM-2, simply remove the AC power cord from the AC source. Operational field strapping changes Any access inside the equipment is only permitted to authorized and qualified service personnel. If it becomes necessary to reconfigure the FLM-2 for 12 channel mode, 6 channel mode or change synchronous/asynchronous configurations, simply follow the appropriate set-up procedure given in para. 2.2.

21 / SYSTEM TESTS Two system tests are available in the FLM-2, local loopback and remote loopback Local Loopback When performing local loopback, the data from the local transmitter is looped back to the local receiver at the digital level, thus checking all local digital circuitry for proper operation. This test is achieved by depressing the LLB push-button switch located on the front panel. If local unit is operating properly, yellow Test LED should be lit, leaving all other LEDs turned off. Furthermore, if local and remote units are properly connected via the main channel, the yellow Test LED on remote unit should be lit too, thus checking local transmitter analog interface and-both analog and. digital remote receiver s sections Remote Loopback Remote loopback loops back data from remote receiver to remote transmitter, thus checking all local digital circuitry as well as both local and remote analog interfaces, main channel link and remote digital receiver section. This test is performed by depressing the RLB push-button switch located on the front panel. If both local and remote units operate properly, yellow Test LEDs should be lit with all other LEDs turned off at both units. Note: When either local or remote loopback test is performed, the - following signals at the remote unit sub-channels are set to OFF (negative voltage) condition: Received Data (Circuit 104) Clear to Send (Circuit 106) Receive Line Signal Detector (Circuit 109)

22 FAULT ISOLATION AND TROUBLESHOOTING The symptoms and corresponding procedures listed in Table 3-1 below enable the user to identify, isolate and correct faults in accordance with the knowledgeable tools and replacement parts available. I. WARNING These service instructions are for use by qualified service personnel only. To avoid shock, do not perform any servicing other than that contained in the operating instructions unless you are qualified to do so. Table 3-1: Fault Isolation and Troubleshooting SYMPTOM ACTION All front pannel a. Check that power is supplied to the unit; indicators, are OFF b. Check the fuse inside the AC receptacle on the rear panel and replace it with a new one, if necessary; c. Replace unit. The fault is probably in the unit s power supply circuits. Red LOCAL SYNC LOSS a. Perform LLB. yellow TEST LED should be ON is ON while LOCAL SYNC LOSS should go OFF; If not - replace the local unit, otherwise proceed as follows: b. Perform RLB, yellow TEST LED should be ON and LOCAL SYNC LOSS should go OFF. In that case replace remote unit. Otherwise proceed as follows: c. Perform steps (a) and (b) at the remote site. If the fault is still not located, replace both units - one at a time. If the problem remains - the main channel link between the units is probably defective and should be checked. Red REMOTE SYNC LOSS is ON a. Perform all the tests as in the case of LOCAL SYNC LOSS starting at the remote site