Instrukcja obsługi American Telecom AM64/128A

Instrukcja obsługi dla urządzenia American Telecom AM64/128A

Urządzenie: American Telecom AM64/128A
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Data dodania: 2014-08-03 18:45:32
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Instrukcja obsługi American Telecom AM64/128A
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Streszczenie treści zawartej na stronie nr. 1

AM64/128A
BASE BAND MODEM
USER MANUAL
ATL Part No. 1/203/002/610
Issue 4 - September 2002.

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AM64/128A User Manual THE INFORMATION CONTAINED IN THIS DOCUMENT IS CONFIDENTIAL TO ATL TELECOM LTD. AND MAY NOT BE DISCLOSED OR REPRODUCED IN WHOLE OR IN PART WITHOUT THEIR WRITTEN CONSENT. ©ATL TELECOM LTD. 2002. 2

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Contents AM64/128A User Manual CONTENTS 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 2. Constructional Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 2.1 Base Band Modems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 2.2 Interface Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 3. System

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AM64/128A User Manual Contents 5.6 Option Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 5.6.1 X.21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 5.6.2 X.21bis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 5.6.3 G.703 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 5.6.4 Asynchronous Mode . . . . . . . . . . . . . . . .

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Introduction AM64/128A User Manual 1. INTRODUCTION This manual applies to the AM 64/128A Baseband Modem. This modem is manufactured in the U.K. by ATL Telecom Ltd. There are six variants, each with a different physical data interface circuit. The ATL Telecom Ltd. part numbers for these variants are as follows :- • AM 64/128A - X.21 : 1/203/102/100 • AM64/128A - X.21bis : 1/203/202/100 • AM64/128A - V.35 : 1/203/302/100 • AM64/128A - V.36 : 1/203/402/100 • AM64/128A - RS530 : 1/203/502/100 • AM64

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Constructional Details AM64/128A User Manual 2. CONSTRUCTIONAL DETAILS 2.1 Baseband Modems The BBM is housed in a black plastic case. On the front panel there is a menu driven LCD display with six keys and five LED's. On the back panel there is a 3- pin IEC mains inlet socket, an input voltage selector switch (230V/120V), a 6-way - 4-loaded RJ11 connector type line cord socket, and one data interface connector. The data interface connector type will be from one of the six user specified interfac

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System Overview AM64/128A User Manual 3. SYSTEM OVERVIEW The AM64/128A baseband modem uses the digital transmission system designed and developed by ATL Telecom Ltd. in Cardiff. It is intended for operation on 2-wire local telephone network circuits, such as those meeting BT EPS-9 (2-Wire). It will operate satisfactorily on unloaded lines having a wide range of characteristics; bridge taps can be tolerated, dependent upon their characteristics. Although the system requires a baseband circuit, a

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AM64/128A User Manual System Overview The interface circuit performs a number of functions : it converts between the user data from the appropriate interface and the 64kbps or 128kbps, which is transmitted down the line; it links the control circuit to the control channel; it interfaces the control circuit to the control lines of the data ports. Again, these functions are performed by a custom IC supported by a number of standard components. Looking at each function in turn, user data at 64kbps

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Installation AM64/128A User Manual 4. INSTALLATION This chapter describes the basic steps that are required to set up a system involving the Baseband Modems (BBM's). There are two basic systems that will be considered: (1) BBM connected to BBM (2) BBM connected to Line Card When considering the installation general pointers to the configuration of the BBM's are given. It should be noted that there are many BBM parameters which may be set differently and prevent the results from being as expected

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AM64/128A User Manual Installation Set the line rate (section 5.7.2) as required at both ends, and set the user data rate up on the master (section 5.5). When the line is connected the FAULT LED should go out. The interface details and synchronous or asynchronous working should now be configured at both ends. This is done using the option menu (section 5.6). Note : When the AM64/128A has the G.703 interface fitted, then the unit is only operational in Master mode and a user rate of 64kbps. In th

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Installation AM64/128A User Manual 4.2 BBM to Line Card Link Power up the BBM as described previously, and set the modem to slave mode. Set the line rate as required, and connect the line cord. Consult the line card handbook to set up the user data rate. The modem should automatically program to this rate. There will be an ‘options enable’ switch on the line card which determines whether the interface details are to be set either from the line card or modem. If the interface is to be set from th

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Menu Operation AM64/128A User Manual 5. MENU OPERATION 5.1 Front Panel Features The Baseband Modem has an uncluttered and easy to understand front panel. It has a liquid crystal display (LCD), 5 LED’s, and 6 non-locking keys. With the 16 character alphanumeric, dot-matrix liquid crystal display it is possible to describe most of the functions in plain English, thus avoiding having to use complicated mnemonics and the need to constantly refer to a hand book. The 6 front panel keys are as follows:

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AM64/128A User Manual Front Panel Operation 5.2 Front Panel Operation The LCD will display one of five menus at any one time, these menus are: 1. STATUS (Prompt is S>) 2. TEST (Prompt is T>) 3. RATE (Prompt is R>) 4. OPTION (Prompt is O>) 5. CONFIG (Prompt is C>) In normal circumstances, the front panel LCD will display a Status message relating to the overall state of the data link e.g. READY. Additional status information may be displayed by scrolling down through the menu. The Status menu is

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Status Menu AM64/128A User Manual 5.3 Status Menu The status menu is read only, which means the select button has no effect. It provides the following data: (1) Overall status (2) Alarm messages (3) User data rate (4) Line rate (5) Interface status (6) Operating mode 5.3.1 Over all Status The possible messages for this item in priority order, and the conditions which set them are as follows: S > Loop Active S > LTU Not Ready S > LTU Ready S > Data Transfer S > Send Data S > Receive Data (a) If a

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AM64/128A User Manual Alarm Status 5.3.2 Alarm Status The possible messages for this item are: S > No Alarm S > No Signal S > Receiving AIS S > No Alignment The S > No Signal display indicates that the transmission system cannot find a signal to lock on to. Possible causes are: (a) Broken or defective line (b) Both ends master, or both ends slave (c) Incorrect line rate (d) Line attenuation / noise level too high The S > Receiving AIS display indicates that an AIS (Alarm Indication Signal) patte

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Status Menu AM64/128A User Manual 5.3.3 User Rate This item displays the user rate in current use. A complete list is given in section 5.5 - Rate Menu. For example: S > 48K 10 5.3.4 Line Rate This has to be set locally to the BBM via the front panel and cannot be downloaded from the Master unit. This displays the line rate in use: If the high line rate (71.1kbps) is selected then the display is: S > 64K Rate Note : This is the only rate available with G.703 Interface. If double line rate (142.2k

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AM64/128A User Manual Menu Operation - Status Menu 5.3.6 Operating Mode The BBM is capable of operating in two basic modes: S > Link Mode S > Network Mode For a BBM to BBM link this display should read Link Mode. If however a Line Card is used instead of a master BBM, then the display should read Network Mode. The essential differences of Network mode are that the line card can download the Options (105 Set On, 106 Delay, 107=108, 108/1 Set On, can be set from the line card and control from the

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Menu Operation - Test Menu AM64/128A User Manual 5.4 Test Menu 1. Local loop 2. Loop back 3. Remote loop 4. Binary pattern 5. Data error test 6. In service error test 7. Lamp test 8. Self Test 9. Comms channel loop 5.4.1 Local loop This is a loop applied within the local BBM. It loops data back to the DTE from a point as close to the interface connector as possible. This loop can be applied in two ways (1) From the Menu. (2) Direct from the DTE - see section 5.4.1.2. 5.4.1.1 Local loop from menu

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AM64/128A User Manual Test Menu With a G.703 Interface fitted, the application of a local loop will cause G.703 data to be looped back to the G.703 network at the G.703 interface (known as a Loop B / LCB loop on the G.703 linecard and standalone units) as shown in figure 5.4.1.2 below. 5.4.1.2 Local loop from DTE To apply a local loop in this fashion refer to your DTE equipment handbook for details on how to send the pattern. The BBM can be in any menu when this loop is applied, it does not have

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Test Menu AM64/128A User Manual With a G.703 interface fitted, the application of a loopback will apply a loopback to line at the remote slave unit (known as an LTU loop on the G.703 linecard and standalone units). Note : It is not possible to “Hardwire” a G.703 loop at the G.703 interface connector. 5.4.3. Remote Loop Remote loop involves turning on a BBM loopback, but from the other end of the link (see figure 5.4.3). This can only be menu activated from a BBM with a X.21bis interface. It is a


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