Echo & Echo LANLink PCM/ADPCM Compression Option
Contents
1. 1 1 10 nes 10 Timeslot 16 Assignment ss re ee er ee 11 ADPEM Parameter een ebenen 11 EXample SOU UPS nine ea eds dede Vite tr b Ev ete ee AE LO 12 AN ic te rete red vom du batis det du fuot ae E du ap af 15 ADPCM Module Installation pen aeg 15 ADPCM Interface Cabling amp Connections 15 Internal Jumper ans ei 15 SS EG ee Be ee en 15 Appendix 00000000A Wa amings dissem 16 Appendix 0000000 Approval 19 TECHNICAL 0118 931 2233 5 PCM ADPCM Compression Option 00000000Introduction This User Manual Supplement describes the Installation Operation and Use of the ECHO ADPCM module and must be read in conjunction with the ECHO Multiplexer User Manual The ECHO ADPCM module allows the ECHO multiplexer to take 30 channels of PCM G 711 voice presented on the Drop amp Insert D amp I interface and compress them down to 15 timeslots each containing two four bit samples of 32k ADPCM G 721 For normal voice conversations ADPCM Adaptive Differential Pulse Code Modulation provides voice quality that comparable to PCM digitised voice conversation Typical use of the ADPCM module is to interconnect two PABX systems Even if the full 30 channels of PCM are selected it still leaves 960Kbps of spare bandwidth free for data traffic Installation details2. BLACK BOX 7777 PCM ADPCM Compression Option MXU9081C Echo amp Echo LANLink PCM ADPCM Compression Option TECHNICAL SALES FAX ADDRESS WEB 0118 965 6000 0118 965 5100 0118 965 5001 464 Basingstoke Road Reading Berkshire RG2 0QN www blackbox co uk PCM ADPCM Compression Option How To Contact your Local Black Box Italy Black Box Italia S P A Tel 0227400280 Fax 0227400219 Web Site www blackbox it Deutschland Black Box Deutschland Tel 0811 5541 0 Fax 0811 5541 499 Web Site www blackbox deutschland com Switzerland Datacom Black Box Services AG Tel 0554517070 Fax 0554517075 Web Site www black box ch Netherlands Black Box Datacom BV Tel 03032417799 Fax 0302414746 Web Site www blackbox nl Belgium Black Box Tel 027258550 Fax 027259212 Web Site www blackbox be 2 SALES 0118 965 5100 Australia Black Box Catalog Australia PTY LTD Tel 0398797100 Fax 0398702955 Brazil Black Box Do Brasil Tel 011 5515 4000 Fax 011 5515 4002 Web Site www blackbox com br Canada Black Box Canada Corp Tel 0416 736 8000 Fax 0416 736 7348 Web Site www blackbox com Mexico Black Box De Mexico S A de C V Tel 05 420 0100 Fax 05 420 0123 Web Site www blackbox com mx Japan Black Box Catalog Tel 03 3820 5011 Fax 03 3820 5010 Web Site www blackbox co jp France Black Box Catalogue Tel 0145606700 Fax 0145606747 Web Site ww
3. for the ADPCM module are covered on page 15 6 SALES 0118 965 5100 PCM ADPCM Compression Option Functional Overview The ADPCM module is a plug in replacement for the Drop and Insert D amp I card It contains 30 bi directional ADPCM compression units operating at 64K to 32K G 721 compression Each timeslot allocated to the ADPCM module maps to two compressed PCM timeslots determined by which mapping mode is selected Two mapping modes Alternate see Example a and Sequential see Example b have been implemented to allow some flexibility when assigning timeslots Timeslots may still be assigned to transparent Drop and Insert D amp I as described in the ECHO MULTIPLEXER User Manual as the ADPCM module incorporates all the functions of the D amp I card Both A Law and u Law PCM coding is available via soft configuration The ADPCM module is soft configured using the same configuration methods used for the ECHO MULTIPLEXER This is outlined in the ECHO MULTIPLEXER manual and in the ADPCM Module Configuration section Mechanical Construction The ADPCM module is built onto a single printed circuit board which must be installed inside the ECHO MULTIPLEXER enclosure TECHNICAL 0118 931 2233 7 PCM ADPCM Compression Option Fixed Timeslot Assignment example a D amp l Timeslot a 1 3 14 E 17 18 21 22 23 24 25 26 27 2
4. indicates that a channel is being transparently passed to the remote i e no compression 10 49 SALES 0118 965 5100 PCM ADPCM Compression Option Timeslot 16 Assignment For correct operation of the PABX signalling information timeslot 16 must be passed transparently to the remote PABX i e timeslot 16 must be assigned to D drop and insert This is not done automatically and must be set manually by the user if any voice channels are to be used ADPCM Parameters Locating the cursor alongside the entry in exactly the same manner as used on the ECHO MULTIPLEXER accesses parameters for the ADPCM module To view the valid choices for the parameter press the spacebar or keys The choices by parameter are PARAMETER CHOICES NOTES Mode NORMAL Normal run mode LOCAL LOOP D amp I Port Loopback causes D amp I to get carrier even when not connected to link REMOTE LOOP Payload loopback causes data at D amp I port to be echoed back to the PABX Framing CRC4 16 Frame Synchronisation using CRC4 pattern Allows better link diagnostics Non CRC4 2 Frame Synchronisation only TECHNICAL 0118 931 2233 11 PCM ADPCM Compression Option ADPCM Mapping Alternate Allows odd timeslots 1 31 excluding 17 to be allocated to the ADPCM module See Examples Sequential Allows timeslots 1 15 to be allocated to the ADPCM module See Examples Affects the ADPCM algorithm This must be set to the
5. 8 29 30 NZ 7 4115 Physical Codec chips 13 14 BH 22 23 24 25 26 27 28 29 30 31 MUX Port Timeslot man Fixed Timeslot Assignment example b D amp l del nn a 2 13 14 21 22 23 24 25 26 27 28 29 30 31 NZ 7 4115 Physical Codec chips p 9 10 11 12 13 14 15 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 MUX Port Timeslot map 8 SALES 0118 965 5100 PCM ADPCM Compression Option Use And Configuration This section only describes configuration of the ECHO ADPCM module Configuration of data channels is described in the USE AND CONFIGURATION section of the ECHO MULTIPLEXER User Manual The ADPCM module options can be modified using the simple terminal configuration process described in the next section similar to that for the ECHO MULTIPLEXER If you are not familiar with general configuration of the ECHO MULTIPLEXER please refer to the USE AND CONFIGURATION section of the E
6. CHO MULTIPLEXER User Manual before reading the following sections or attempting to configure the ADPCM module PABX Connection The PABX may be connected to the ADPCM module using a European 120 Ohms RJ45 or UK 75 Ohms 2 x BNC The interface type must be selected using the internal jumper link on the ADPCM module before connecting the equipment ADPCM Configuration Display If the ADPCM module has been fitted correctly the ECHO configuration screen will display D amp I Channels 1 ADPCM in the upper right area of the screen The D amp I ADPCM configuration display shown below is reached from any other page by locating the cursor alongside this option and then pressing return The same page for setting up the D amp I card is also used for setting up the ADPCM module The current interface type UK or EUR is reported next to D amp I Channel Alongside this the current status SYNCHRONISED or NO CARRIER of the D amp I carrier signal is displayed The bandwidth allocated to the ADPCM module is displayed next to Drop Bandwidth This is updated as timeslots are added removed from the main timeslot map TECHNICAL 0118 931 2233 9 PCM ADPCM Compression Option 2 MEGABIT El MULTIPLEXER v1 04 Main Link EUR SYNCHRONISED Mode NORMAL Nx64 Channels 2 Framing CRC4 D amp I Channels 1 ADPCM Idle Bandwidth 1984K Alarms None Clock Reference LOOP Statistics Main Link Configuration gt LOCAL Events Log D amp I
7. Channel EUR SYNCHRONISED Drop Bandwidth OFF Mode NORMAL Framing CRC4 ADPCM Mapping Alternate ADPCM Law Cursor keys to move CTRL U to save ESC to abandon Use lt SPACEBAR gt lt gt lt gt to select D amp I ADPCM Configuration Page ADPCM Timeslot Assignment Timeslots are assigned by moving the cursor down to the TIMESLOT MAP section of the D amp I Channels screen Timeslots may be assigned directly by pressing the appropriate key on the Supervisor port terminal keyboard e g Pressing 1 assigns the slot to Nx64 Channel 1 2 assigns the slot to Nx64 Channel 2 3 assigns the slot to Nx64 Channel 3 if fitted 4 assigns the slot to Nx64 Channel 4 if fitted D assigns the slot to the D amp I Channel A assigns the slot to the ADPCM module un assigns the timeslot Unlike the other assignments the ADPCM module may only be assigned to certain timeslots determined by the ADPCM Mapping An attempt to allocate an invalid slot will be ignored Timeslots assigned to the ADPCM module will also highlight which PCM timeslots are being assigned in the PCM TIMESLOT MAP above the main timeslot map each PCM channel being represented by a P Note that each ADPCM assignment will map to two PCM channels since it carries two compressed PCM samples Timeslots may also be assigned to transparent using the Drop and Insert D amp I function as described in the ECHO MULTIPLEXER User Manual A D in the PCM timeslot map
8. RMAL Framing CRC4 ADPCM Mapping Sequential ADPCM Law Cursor keys to move Nx64 Channels D amp I Channels Alarms Statistics Events Drop Bandwidth 2 1 ADPCM None Main Link Log 1024K CTRL U to save ESC to abandon Use lt SPACEBAR gt lt gt lt gt to select Set up Example 4 PCM channels 1 2 20 and 21 selected for compression Sequential ADPCM Mapping 14 SALES 0118 965 5100 PCM ADPCM Compression Option Installation WARNING Refer to Appendix A for Safety Instructions WARNING The multiplexer must be disconnected from the power supply and all peripheral connections before opening ADPCM Module Installation With power turned OFF and DISCONNECTED the screws on the left right and top of the multiplexer are removed using a No 1 Pozidrive screwdriver to gain access to the interior of the multiplexer Remove the two screws from either side of the D amp I port on the rear panel of the unit This will release the blanking plate or the D amp I card if fitted The ADPCM module plugs into connector J9 on the ECHO baseboard replacing the D amp I card if fitted The two screws should then be used to retain the module once fitted ADPCM Interface Cabling amp Connections Suitable connection may be arranged using an RJ45 connector for European installations or BNC connectors for UK installations as described in the ECHO MULTIPLEXER User Manual Internal Jumper Link The internal jumpe
9. de NORMAL Framing CRC4 ADPCM Mapping Sequential ADPCM Law AAAAAAAAAAD Cursor keys to move CTRL U to save ESC to abandon Use lt SPACEBAR gt lt gt lt gt to select Set up Example 2 All 30 PCM channels selected for compression Sequential ADPCM_ Mappin The following example displays show how to set up PCM channels 1 2 20 and 21 to be compressed using both mapping modes Note that timeslot 16 must be set to D for the PABX signalling information The free timeslots may be allocated to one or more data channels 2 MEGABIT El MULTIPLEXER Main Link EUR SYNCHRONISED Mode NORMAL Nx64 Channels 2 Framing CRC4 D amp I Channels 1 ADPCM Idle Bandwidth 960K Alarms None Clock Reference LOOP Statistics Main Link Configuration gt LOCAL Events Log D amp I Channel EUR SYNCHRONISED Drop Bandwidth 1024K Mode NORMAL Framing CRC4 ADPCM Mapping Alternate ADPCM Law Cursor keys to move CTRL U to save ESC to abandon Use lt SPACEBAR gt lt gt lt gt to select Set up Example 3 PCM channels 1 2 20 and 21 selected for compression Alternate_ ADPCM Mapping TECHNICAL 0118 931 2233 13 PCM ADPCM Compression Option 2 MEGABIT El MULTIPLEXER Main Link EUR SYNCHRONISED Mode NORMAL Framing CRC4 Idle Bandwidth 960K Clock Reference LOOP Configuration gt LOCAL D amp I Channel EUR SYNCHRONISED Mode NO
10. e SELV safety classification 16 SALES 0118 965 5100 PCM ADPCM Compression Option Warnung Dieses Ger t Mu an einem Anschlu mit Schutzleiter betrieben werden Zum sicheren Betrieb ist der Anschlu des Ger tes an Spannungsversorgungen mit Schutzleiter notwendig Nur so kann ein optimaler Schutz f r Bedienpersonal und bertragungseinrichtungen gew hrleistet werden Unter keinen Umst nden darf dieses Ger t ohne Schutzleiter betrieben werden da ansonsten die Zulassung f r den Anschlu an Netzen erlischt Warnung Installation des Ger tes Die Installation des Ger tes darf nur von entsprechend ausgebildetem und autorisiertem Personal durchgef hrt werden Warnung Anschlu von anderen Ger ten Angeschlossen werden d rfen nur Systeme mit entsprechenden zugelassenen und geeigneten Schnittstellen siehe auch nachfolgende Tabelle SELV Ports i Supervisor port ii MAIN port iii D amp I port iv CH1 and CH2 Channel ports v EXT CLOCK vi ALARM port Die oben aufgef hrten Ports sind klassifiziert als SELV Safety Extra Low Voltage in bereinstimmung mit Absatz 2 3 der Verordnung EN60950 BS7002 IEC950 soweit anwendbar und d rfen nur zusammen mit Ger ten verwendet werden die dieser Bestimmung entsprechen TECHNICAL 0118 931 2233 17 PCM ADPCM Compression Option Mise en garde Mise en garde Mise en garde Cet quipement doit tre reli a la terre Cet quipement doit poss der une pris
11. e de terre de mani re 2 ce que le r seau t l com et ses utilisateurs soient quitablement prot g s Tout manquement cette obligation entrainerait l annulation de l autorisation de connexion a un r seau Installation de l quipment L installation doit tre assur e uniquement par des personnels convenablement form s ce type de mat riel Connexion d autres quipements Des quipement compl mentaires pourrant tre connect s aux ports de cet quipement la seule condition que ceux ci soient agr es Les conditions optimales de s curit pour toute connexion sont d finies ci dessous Ports SELV 1 port Supervisor ii port MAIN iii port D amp I iv ports pour les canaux CH1 CH2 v port EXT CLOCK vi port ALARM Les ports cit s ci dessous sont class s dans la cat gorie SELV Safety Extra Low Voltage conform ment la classe 2 3 de EN60950 BS7002 IEC950 applicable et doivent tre connect s des quipements r pondant la norme de s curit SELV 18 49 SALES 0118 965 5100 PCM ADPCM Compression Option Appendix B0000000 Approval Requirements The Echo MULTIPLEXER carrying the BABT CE168 assessment symbols and approval number is approved for connection to the networks identified in this Appendix as follows G 703 In the UK to PD7024 75 Ohm Un balanced via 2 x BNC connectors The internal link must be set to the UK position as detailed in the installation instructions Thr
12. oughout Europe Pan European to CTR12 based on NET12 via RJ45 Connector 120 Ohms Balanced The internal link must be set to the EUR position as detailed in the installation instructions TECHNICAL 0118 931 2233 19
13. r link on the ADPCM module must be set to the required interface type Fit to LK3 for European installations LK4 for UK installations Testing Replace the cover and screws before powering up the unit Correct installation of the ADPCM module may be confirmed by D amp I Channels 1 ADPCM being displayed in the upper right area of all ECHO configuration screens TECHNICAL 0118 931 2233 15 PCM ADPCM Compression Option Appendix 00000000A Warnings0 WARNING THIS EQUIPMENT MUST EARTHED _ GROUNDED This equipment relies on the EARTH GROUND connection to ensure safe operation such that the user and TELECOM Network are adequately protected It must not under any circumstances be operated without an earth connection which could nullify its approval for connection to a network WARNING INSTALLATION OF EQUIPMENT Installation of this equipment must only be performed by suitably trained service personnel WARNING CONNECTION OF OTHER EQUIPMENT This equipment allows connection only of suitably approved equipment to its ports the safety status of which are defined below SELV Ports i Supervisor port ii MAIN port iii D amp I port iv CH1 and CH2 Channel ports v EXT CLOCK vi ALARM port The above named ports are classified as SELV Safety Extra Low Voltage in accordance with in Clause 2 3 of EN60950 BS7002 IEC950 as applicable and must only be connected to equipment which similarly complies with th
14. same as the PABX for the ADPCM to be encoded decoded correctly ADPCM Law The LOCAL and REMOTE set up pages are accessed as usual to configure either location Example Set ups The following example displays show how to set up all 30 PCM channels to be compressed using both mapping modes Note that timeslot 16 must be set to D for the PABX signalling information The free timeslots may be allocated to one or more data channels 2 MEGABIT El MULTIPLEXER Main Mode 5 Nx64 Channels 2 Framing D amp I Channels 1 ADPCM Idle Bandwidth Alarms None Clock Reference Statistics Main Link Configuration Events Log D amp I Channel EUR SYNCHRONISED Drop Bandwidth 1024K Mode NORMAL Framing CRC4 ADPCM Mapping Alternate ADPCM Law Acs A AS A A A A Cursor keys to move CTRL U to save ESC to Use lt SPACEBAR gt lt gt lt gt to select Set up Example 1 All 30 PCM channels selected for compression Alternate ADPCM_ Mappin 12 SALES 0118 965 5100 PCM ADPCM Compression Option 2 MEGABIT El MULTIPLEXER Main Link EUR SYNCHRONISED Mode NORMAL Nx64 Channels 2 Framing CRC4 D amp I Channels 1 ADPCM Idle Bandwidth 960K Alarms None Clock Reference LOOP Statistics Main Link Configuration gt LOCAL Events Log D amp I Channel EUR SYNCHRONISED Drop Bandwidth 1024K Mo
15. w blackbox fr Spain Black Box Comunicaciones S A Tel 3491 663 0200 Fax 34 91 661 84 35 Web Site www blackbox es PCM ADPCM Compression Option U S A Black Box Corporation Tel 724 746 5500 Fax 724 746 0746 Web Site www blackbox com Chile Black Box Chile Tel 00 562 223 8811 Fax 00 562 225 1002 Web Site www blackbox cl TECHNICAL 0118 931 2233 3 PCM ADPCM Compression Option Echo ADPCM Module User Manual Supplement WARNING BEFORE L nox PLEASE REFER TO SAFETY INSTRUCTIONS IN APPENDIX A Certified Compliant in the EC when fitted in accordance with the installation instructions against the following directives standards Low Voltage Directive 73 23 EEC and amendment 93 68 EEC EN60950 1992 Safety Electromagnetic Compatibility directive 89 336 EEC and subsequent amendments to date 55022 1994 Emissions EN50082 1 1992 Immunity Telecommunications Terminal Equipment directive 91 263 EEC and amendment 93 68 EEC where indicated in approvals requirements section Contents GOnlents esse AA 4 00000000 00 6 4 SALES 0118 965 5100 PCM ADPCM Compression Option Functional Overview see 7 Mechanical ConSstr cion issues ai ae 7 Use AndC nnguralian seen eos 9 PABX CON ai 9 ADPCM Configuration Display ee an 9 ADPCM Timeslot
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