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Panasonic Digital Business System - Installation Manual

March 1997

Issue 5

41

Primary Rate ISDN Interface

With the introduction of ISDN v1.2 software the DBS can support primary rate ISDN connection using the DASS II
protocol.

With the introduction of the CPC-EX v2.0 software the DBS can support primary rate connection using DASSII or
Q.931 Euro-ISDN and allow connection of upto 48 channels using two cards of the same protocol.

DASS II Important Information

Please read the following information before proceeding with the installation of the DASS II interface.

Maximum Length Of Co-axial Cables
(75 ohm)

Less than 330m between MDF and TJF

Internal Clock

20/- 50ppm

Encoding Process

64Kbps of 2048Kbps. A Law CCITT
Recommendation G.711 1988

E-ISDN Important Information

Please read the following information before proceeding with the installation of the E-ISDN interface.

Maximum Length Of RJ45 Cable
(120 ohm)

Less than m between MDF and TJF

Internal Clock

20/- 50ppm

Encoding Process

64Kbps of 2048Kbps. A Law CCITT
Recommendation G.711 1988

Major Equipment Failure

When the DBS suffers a major equipment failure the CCU must be switched off by the user at the main power
switch. This should be done as soon as the failure occurs.

Installation

The interface consists of a DASS II or E-ISDN trunk card , CPC-C card or higher , synchronisation unit and
external mounted MDF for DASSII or internally mounted MDF for E-ISDN..

The ISDN equipment is connected together as shown in Figure 27

Note:

The ISDN TRK card must be installed in the universal slot of the DBS on single cabinet systems and the universal
slot of the slave CCU on double structure systems.

If two ISDN cards are used the system must be a double CCU system and both universal slots must be used for
the ISDN cards and linked as shown in Figure 27

When the ISDN equipment is installed the number of analogue lines which can be connected to the DBS is
adjusted as a result of the internal DBS addressing. This is shown in the following tables below..

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Содержание DBS 128

Страница 1: ...Panasonic Digital Business System Installation Manual March 1997 Issue 5 1 Panasonic Digital Business System Installation Manual ...

Страница 2: ...ON OF THE MODULAR CARDS 10 LINKING TWO CCUS 12 CONNECTION OF EXCHANGE LINES AND EXTENSIONS 13 ATTACHING A DDK CONNECTOR 13 PIGGY BACK CONNECTIONS 14 EXCHANGE LINE PBX EXTENSION WIRING 14 EXTENSION CONNECTION 15 DSS CONSOLE CONNECTION 16 WALL MOUNTING THE PROPRIETARY EXTENSION TELEPHONES 17 THE VB3411 VB3411D VB3411LDS VB3611D AND VB3611DS 17 WALL MOUNTING THE VB3011 17 SLT RING GENERATOR 18 POWER ...

Страница 3: ...DSET CONNECTION 32 HOST WORKING 32 E M CARD 33 NETWORK MATCHING AND GAIN CONTROL SWITCHES 34 TYPICAL EXAMPLES 35 WIRING 36 AC15A CARD 38 TYPICAL EXAMPLES 39 WIRING 40 PRIMARY RATE ISDN INTERFACE 41 DASS II IMPORTANT INFORMATION 41 E ISDN IMPORTANT INFORMATION 41 MAJOR EQUIPMENT FAILURE 41 INSTALLATION 41 INSTALLING THE ISDN TRK CARD 43 CONNECTION OF A SECOND ISDN CARD TO DOUBLE CCU DBS SYSTEMS 43 ...

Страница 4: ...ch 1997 Issue 5 4 COMMON PROBLEMS AND THEIR SOLUTIONS 51 VOICE ANNOUNCE UNIT 52 HARDWARE 52 WALL MOUNTING THE VAU 53 WIRING AND CABLE CONNECTIONS 54 VAU DIP SWITCH SETTINGS 55 DEFAULT SWITCH SETTINGS 56 OPERATIONAL CONSIDERATIONS 57 EMI FILTER INSTALLATION 58 ...

Страница 5: ...5 This is a condition of the approval Any installation which does not comply with this condition will invalidate the approval of that particular installation This equipment requires a maintenance contract issued by a maintainer holding BSI approval This is a statutory requirement This is a class A product In a domestic environment this product may cause radio interference in which case the user ma...

Страница 6: ...pment in damp or humid environments such as bathrooms and swimming pools 3 Never attempt to insert wires pins or similar objects in the vents or openings of the equipment 4 Never clean the equipment with benzene paint thinner or other solvent materials Wipe with a soft cloth to clean 5 Do not change the installation location without consulting your dealer maintainer 6 Installation of the equipment...

Страница 7: ...ccept the mounting plate Ensure the fixing method is appropriate to the type of wall 2 Fix the four mounting plates provided to the rear of the CCU using 2 screws per plate 3 Lift the CCU and use the holes in the mounting plates to hang it on the screws mounted in the wall 4 Tighten the screws to secure the CCU Figure 2 Wall Mounting The CCU Table 1 Mounting Point Dimensions A B DBS 38 335 mm 570 ...

Страница 8: ...utput or close to the equipment The wires in the mains lead correspond to the following code Wire Colour Meaning Terminal Possible Alternative Terminal Markings Blue Neutral N or coloured black Brown Live L or coloured red Green Yellow Earth E or safety earth symbol or coloured green or coloured green and yellow Table 2 Wiring Colour Codes If in doubt consult a qualified electrician Figure 3 Conne...

Страница 9: ...ng Location DBS 38 DBS 68 DBS 90 Model Number For CCU Specification VB2450A2UK DBS 38 Sealed lead acid battery 2 x BT2007 P 12v 6 5Ah VB26502UK DBS 68 90 Sealed lead acid battery 4 x BT2005 P 6v 8 5Ah Table 3 Internal Battery Specifications Note 1 The batteries can maintain system operation for approximately 30 minutes for a DBS 38 or DBS 68 or 15 minutes for DBS 90 The duration of system operatio...

Страница 10: ...CUs are linked in this way the AUX1 slot in the Master and SCC slot in the Slave are not used Each CCU has one universal slot marked EXT LINE which is capable of supporting all extension and trunk card types In a double CCU system there are two EXT LINE slots one in each CCU To install a card 1 Turn off the system power and remove the front cover 2 Hold the card to be installed with the connection...

Страница 11: ...Cable 2 2 2 2 2 2 VB3682 VB3691 Table 4 Relation Between Slots And Modular Cards Note 1 Never remove the cover of a modular card Note 2 To ease installation of multiple cards install then working from the left of the CCU to the right LINE DEC AEC SCC CPC MFR Link card Note 3 A maximum of 2 E M cards can be fitted to any CCU The DBS 38 CCU can take 1 the DBS 68 and 90 CCUs can take 2 Refer to the E...

Страница 12: ...o the system cut the jumper wire marked J3 on either of the MFR cards Failure to do this will cause the MFR cards to cancel out and DTMF dialling will not be recognised by the system 4 The first extension card of the master CCU must be a Digital extension card DEC The remaining extension cards can be any combination of Analogue extension card AEC and DEC 5 Ensure the switch SW1 on the master conne...

Страница 13: ...ctly wired to the Network Test an Termination Point NTTP via DDKs however it is recommended that an Intermediate Distribution frame IDF is installed and the exchange and extension wiring jumpered across to the wiring running to the DBS Figure 6 Recommended Connection Schematic Attaching A DDK Connector 1 Open the DDK 2 Insert the wires to connected into the four holes on the flap 3 Ensure the wire...

Страница 14: ...k recall signalling to the PBX Timed break will operate on the wiring from the PBX extensions Earth recall will require the connection of an earth wire from the PBX earth point to the PBX EARTH connection point on left hand end of the DBS MDF If an earth connection is required to the DBS this must also be carried across to the EXT LINE slot wiring using a DDK to DDK jumper wire so that any PBX ext...

Страница 15: ...extensions connect using two wires The DSS operator console is wired as a digital extension or piggy backed with the operator extension Extension ports 1 and 2 are the ports for operator extensions DSS units when installed will operate with one or other of these ports as per system programming Digital Extension Connection Digital Extensions are wired to secondary sockets pins 3 and 4 Figure 9 Digi...

Страница 16: ... extension on port 2 can be wired sharing the same socket as the extension or wired as an individual digital extension When the socket is shared use the link wire supplied with the DSS to connect the operator extension to the DSS unit then connect only the cord from the DSS unit to the socket The second DSS unit for each operator is wired as a digital extension DSS consoles can be connected to any...

Страница 17: ...tated and reattached to provide wall a wall mounting bracket Figure 12 Removal And Reattachment Of The Built In Wall Bracket Wall Mounting The VB3011 The VB3011 has a built in wall mounting bracket which is removed and refitted by lifting the bracket and pressing the two holding clips to release the bracket Rotate the bracket and re clip it onto the three clips provided at the base of the handset ...

Страница 18: ... ringing voltage for analogue extensions It is sufficiently powerful to ring 20 analogue extensions at any one time One Ring Generator is required for every CCU When installing a double CCU system one Ring Generator must be fitted to each CCU in which analogue extensions are connected and required to ring Figure 14 Fitting The SLT Ring Generator ...

Страница 19: ...power fail mode The DBS CCUs each have the following numbers of power fail lines Table 6 Power Fail Connections Per CCU Connection of the PFUs is via DDK in the same way as analogue extensions The DDK connections are located at the left hand end of the CCU above the exchange line connection points The highest lines are on DDK 1 and they work downwards Figure 15 Power Fail Connection DBS 90 Shown S...

Страница 20: ...ermined time set by DIP switch settings in the interface box The door latch is trigger is via relays OPENER 1 and OPENER 2 These are normally open relays which close for a predetermined time set by DIP switches on the interface card The relay is used as the switch in the latch circuit It can handle 1 amp at 30v DC or 50v AC maximum Figure 16 Doorphone Interface Connections Initial Setting Table 7 ...

Страница 21: ...em programming requires setting and the DBS switched off and back on to enable the function The input impedance is 10K ohms 10 dB level maximum Important This port does not provide isolation sufficient to satisfy the requirements of BS6301 Apparatus connected to this port must be approved to BS6301 or have previously been evaluated against British Telecommunications PLC Technical Guides 2 or 26 an...

Страница 22: ... external paging is invoked the relay contacts close and the audio is fed via the transformer to the paging system In this case the relay can be used to switch the amplified input of amplifiers which support this function In the Loud Ringing Bell LRB mode the relay closes and remains closed until the call causing the ringing is answered elsewhere in the system In this mode the relay should be used...

Страница 23: ...regarding programming these settings Important This port does not provide isolation sufficient to satisfy the requirements of BS6301 Apparatus connected to this port must be approved to BS6301 or have previously been evaluated against British Telecommunications PLC Technical Guides 2 or 26 and given permission to attach Other usage will invalidate any approval given to the apparatus Figure 19 RS23...

Страница 24: ...uration hours 0 9 000 00 Call cost 000 00 999 99 dd Call duration minutes 00 59 always 000 00 unless meter pulse x Call duration 10 seconds 0 5 detection used Figure 21 v2 x Call Logging Output For versions 3 x software the call logging output was changed as shown below The changes were the addition of seconds to the call duration field and new condition codes to indicate how calls are handled Whe...

Страница 25: ...logging output is updated to show which have been held or transferred The new condition codes are shown below Condition Code Meaning H Call has been held and retrieved or recalled The time field shows when the call was retrieved and the duration will shown how long it was held for If the caller cleared when on hold the line number will be preceded by a Type of hold is not detected T Call has been ...

Страница 26: ...rivate circuit LL 01 48 Exchange Line Channel Number A Attendant Performed An Alarm Operation For Indicated Extension E Indicated Extension Performed An Alarm Operation DD MM HH NN Day Month and Time of the call h mm ss Duration Of The Call C I Incoming Analogue Line Call i Incoming ISDN Call O Outgoing Analouge Line Call o Outgoing ISDN Call Z Incoming ISDN DDI Call H Call Placed On Hold T Call T...

Страница 27: ... 47 0 00 04 o 1310253114477A 000 00 202 05 04 01 23 48 0 00 02 I 00 04 000 00 202 09 04 01 23 48 0 00 06 o 1310432144447A96332 000 00 202 05 04 01 23 48 0 00 17 H 000 00 C005 09 04 01 23 48 0 00 12 T 1310432144447A963322 000 00 C009 05 04 01 23 48 0 00 15 T 000 00 202 05 04 01 23 49 0 00 02 I 00 02 000 00 202 09 04 01 23 49 0 00 02 o 8655331A 000 00 C005 09 04 01 23 50 0 00 18 Z 00 05 000 00 C009 ...

Страница 28: ...0 00 2338 000000 00 2339 000000 00 2340 000000 00 2341 000000 00 2342 000000 00 2343 000000 00 Network Account data A record is produced for each of the 12 DC5 AC15A circuits NET01 000000 00 NET02 000000 00 NET03 000000 00 NET04 000000 00 NET05 000000 00 NET06 000000 00 NET07 000000 00 NET08 000000 00 NET09 000000 00 NET10 000000 00 NET11 000000 00 NET12 000000 00 DISA ID Account data A record is ...

Страница 29: ...led a remote PC with modem can gain access to the system and adjust its programming 1 Switch off the DBS and remove the front cover 2 Withdraw the SCC card and unclip its top cover 3 Plug the RAI card into connectors CN2 and CN3 Ensure that the pins are not damaged when doing this 4 Replace the SCC card cover and re install the SCC card 5 Replace the system covers and switch the DBS on Figure 24 R...

Страница 30: ...s are mounted directly onto the line cards and the 48v power supply unit hooks on below the SLT ring generator and connects to CN13 at the top left hand end of the MDF 1 Switch off the DBS and remove the front cover 2 Withdraw the LINE card and unclip its top cover 3 Plug the MPD cards into the sockets provided Ensure that the pins are not damaged when doing this 4 Replace the LINE card cover and ...

Страница 31: ...peration for approximately 3 hours on DBS 38 and 1 hour on DBS 68 and DBS 90 cabinets When using external batteries each CCU in the system will require a cabinet and battery unit The power failure operation time will depend upon prevailing traffic conditions The maintenance maximum back up time Panasonic recommend replacing the batteries every 3 years The recommended replacement is VB24973 but any...

Страница 32: ...disconnect the curly cord at the base and plug in the headset then put the extension into headset mode by entering On Off 51 On Off Clement Clarke International Ltd Airmed House Edinburgh Way Harlow Essex CM20 2ED 01279 414969 Host Working The DBS is approved to work as a host to other systems Connection is made from analogue extensions on the DBS to the exchange lines of the other system The othe...

Страница 33: ...ard cannot be installed in this slot Note 2 On DBS128 DBS 158 and DBS 180 a maximum of 2 E M Cards may be fitted in the each CCU cabinet The interface consists of 4 wires A B E M A B are used for the speech path E M are used for control signalling E Ear is used for receiving signals and M Mouth is used for transmitting signals When connecting to other equipment usually connect E to M and M to E In...

Страница 34: ...tches should normally be left in their preset positions since these have been chosen to suit the UK network The following figure and tables show the location and effect of these switches Figure 27 Location Of Matching Switches On The E M Card Switches 105 to 305 have two positions A and B to match the following A 370 620 310 uF B 300 1000 0 22 uF Switches 103 to 303 and 104 to 304 are four positio...

Страница 35: ...anasonic Digital Business System Installation Manual March 1997 Issue 5 35 Typical Examples Figure 28 E M 2 system configuration Figure 29 E M 3 system configuration Figure 30 E M 4 system configuration ...

Страница 36: ...e 4 Plug the completed DDK connector into the exchange line port designated COL on the MDF corresponding to the E M card location 5 The other end of the wires should be connected directly or via an intermediate distribution frame IDF to the private circuit interface equipment Figure 31 DDK E M Wiring 6 A Signal earth is required between the CCU and the connected signal equipment DC5 AC15 converter...

Страница 37: ...Panasonic Digital Business System Installation Manual March 1997 Issue 5 37 Figure 33 DBS To DBS E M Connection ...

Страница 38: ...h DBS system and the slots in which they can be used Table 8 AC15A Card Allowed Slots Note 1 The first LINE slot of all DBS systems is reserved for power failure operation therefore the AC15A card cannot be installed in this slot Note 2 On DBS128 DBS 158 and DBS 180 a maximum of 2 AC15A Cards may be fitted in the each CCU cabinet Up to four DBS s can be networked When building a network any connec...

Страница 39: ...sonic Digital Business System Installation Manual March 1997 Issue 5 39 Typical Examples Figure 28 AC15A 2 system configuration Figure 29 AC15A 3 system configuration Figure 30 AC15A 4 system configuration ...

Страница 40: ...g order TX1 wire into hole 1 TX2 wire into hole 2 RX1 wire into hole 3 RX2 wire into hole 4 3 Press the cover of the DDK connector down to the base until it locks firmly into place 4 Plug the completed DDK connector into the exchange line port designated COL on the MDF corresponding to the AC15A card location 5 The other end of the wires should be connected directly or via an intermediate distribu...

Страница 41: ... 120 ohm Less than m between MDF and TJF Internal Clock 2048Kbps 50ppm Encoding Process 64Kbps of 2048Kbps A Law CCITT Recommendation G 711 1988 Major Equipment Failure When the DBS suffers a major equipment failure the CCU must be switched off by the user at the main power switch This should be done as soon as the failure occurs Installation The interface consists of a DASS II or E ISDN trunk car...

Страница 42: ... flexible cords of nominal cross sectional area being 1mm2 to 1 5mm2 To comply with EMC Directive 89 336 EEC and it amendments 92 31 EEC and 93 68 EEC EMI filters supplied must be installed as per the figure over the page The cable must be looped once through the filter and a filter fitted at each end of the cable between the CPC and DASS TRK cards and the DASS TRK card and the DASS MDF Figure 27a...

Страница 43: ...he Master must be a E ISDN or revised DASSII unit with an extension socket for the Sync Unit connection The slave card must use the same protocol E ISDN or DASSII but can be an original DASSII card with no output socket for Sync connection if the card in the Master CCU is also DASSII All E ISDN cards are fitted with the additional socket The Sync Unit is then connected from the CPC EX v1 5 or late...

Страница 44: ... flexible cords of nominal cross sectional area being 1mm2 to 1 5mm2 Connect the Tip T and Ring R wires from the DASS II NTTP provided by the network carrier to the T and R terminals on the DASS II MDF using BNC BNC cables not supplied Connect the cable from the DASS II MDF to CN3 on the DASS II TRK card Installing The E ISDN MDF The E ISDN MDF is mounted on the CCU frame above the SLT ring genera...

Страница 45: ... 12 12 21 21 12 12 12 21 21 12 12 12 13 20 20 13 20 20 13 13 20 20 13 13 14 19 19 14 19 19 14 14 19 19 14 14 15 18 18 15 18 18 15 15 18 18 15 15 16 17 17 16 17 17 16 16 17 17 16 16 17 16 16 17 16 16 16 17 17 16 16 16 17 17 18 15 15 18 15 15 15 18 18 15 15 15 18 18 19 14 14 19 14 14 14 19 14 14 14 19 20 13 13 20 13 13 13 20 13 13 13 20 21 12 12 21 12 12 12 21 12 12 12 21 22 11 11 22 11 11 11 22 11 ...

Страница 46: ...6 26 23 23 23 23 24 25 25 25 25 24 24 24 24 25 25 25 25 24 24 24 24 25 24 24 24 24 24 25 25 25 24 24 24 24 24 25 25 25 26 23 23 23 23 23 26 26 26 23 23 23 23 23 26 26 26 27 22 22 22 22 22 27 27 27 22 22 22 22 22 27 27 27 28 21 21 21 21 21 28 28 28 21 21 21 21 21 28 28 28 29 20 20 20 20 20 29 29 29 20 20 20 20 20 29 29 29 30 19 19 19 19 19 30 30 30 19 19 19 19 19 30 30 30 31 18 18 18 18 18 31 31 18...

Страница 47: ... 27 27 27 22 22 22 22 22 23 26 26 26 26 23 23 23 23 23 24 25 25 25 25 24 24 24 24 24 25 24 24 24 24 24 25 25 25 25 26 23 23 23 23 23 26 26 26 26 27 22 22 22 22 22 27 27 27 27 28 21 21 21 21 21 28 28 28 28 29 20 20 20 20 20 29 29 29 29 30 19 19 19 19 19 30 30 30 30 31 18 18 18 18 18 31 31 31 32 17 17 17 17 17 32 32 32 33 16 16 16 16 16 16 33 33 33 34 15 15 15 15 15 15 34 34 34 35 14 14 14 14 14 14 ...

Страница 48: ...7 22 22 22 22 23 26 26 26 26 23 23 23 23 26 26 26 26 23 23 23 23 24 25 25 25 25 24 24 24 24 25 25 25 25 24 24 24 24 25 24 24 24 24 24 25 25 25 24 24 24 24 24 25 25 25 26 23 23 23 23 23 26 26 26 23 23 23 23 23 26 26 26 27 22 22 22 22 22 27 27 27 22 22 22 22 22 27 27 27 28 21 21 21 21 21 28 28 28 21 21 21 21 21 28 28 28 29 20 20 20 20 20 29 29 29 20 20 20 20 20 29 29 29 30 19 19 19 19 19 30 30 30 19...

Страница 49: ...28 28 21 21 21 21 21 22 27 27 27 27 22 22 22 22 22 23 26 26 26 26 23 23 23 23 23 24 25 25 25 25 24 24 24 24 24 25 24 24 24 24 24 25 25 25 25 26 23 23 23 23 23 26 26 26 26 27 22 22 22 22 22 27 27 27 27 28 21 21 21 21 21 28 28 28 28 29 20 20 20 20 20 29 29 29 29 30 19 19 19 19 19 30 30 30 30 31 18 18 18 18 18 18 31 31 31 32 17 17 17 17 17 17 32 32 32 33 16 16 16 16 16 16 33 33 33 34 15 15 15 15 15 1...

Страница 50: ...Remove the CPC card PCB from the casing by releasing the four clips 2 Remove the CPC PCB 3 Fit the three PCB spacer posts from the underside to support the sync unit 4 Remove the jumpers from CN2 of the PCB 5 Refit the PCB into the casing 6 Fit the jumper on the sync unit CN4 to connect pins 2 and 3 7 Fit the sync unit to the CPC PCB taking care to align CN2 CN3 and the spacer posts Following the ...

Страница 51: ...ection is made the DBS and network synchronise timing and then the transmit channels are initialised followed by the receive channels then all channels are sequentially cleared ready for call traffic 9 If the DBS cannot make a call check that the network services have been activated and request that they be reset Following the reset wait for 3 5 minutes for the DBS and network to synchronise and t...

Страница 52: ...ge If the VAU is used to back up an operator or group of people a delay to answer can be inserted this allows the original persons time to answer the call if they are available The delay to answer time is determined by dip switches within a range from 0 to 32 seconds Recall ringing will override the delay to answer timer and the call will be answered immediately In the event that a caller is using...

Страница 53: ...between C and D back and forth several times to remove it 3 Remove the small plate between C and D and put the wire here Then replace the plate as before 4 Place one of the three provided screws in the wall at E leaving a 8 mm space between the wall and the screw 5 Hang the unit on the wall and tighten the screw 6 Using the remaining two screws attach the unit to the wall at areas marked F and G 7...

Страница 54: ...s 3 Connect the line cord to a secondary socket wired as per the diagram below The pair on 3 4 are for VAU port 1 and 2 5 are for VAU port 2 The power supply for this unit is via port 1 therefore if only one port is connected to the VAU use port 1 Do not connect port 2 only 4 Connect the modular plug to the VAU and replace the VAU s top cover Figure 31 Secondary Socket Wiring ...

Страница 55: ...iving extension regardless of its status The call will revert to the VAU after the time set in the system programming when the second message will be played 2 CCU Type Switch DBS default S DBS SW1 2 OFF ON 3 Message Sending Time Switch 32 secs One message 16 secs default Two messages SW1 3 OFF ON When 1 message of 32 seconds is selected the VAU will repeat the message when it would otherwise play ...

Страница 56: ...he call If there is no DTMF received the VAU will pass the call to the operator extension or its alternative as entered in the VAU set up parameter 990 See VAU section of the Operating Instructions 8 Extension Digit Switch 1 digit 2 digit 3 digit default 4 digit SW2 7 OFF OFF ON ON SW2 8 OFF ON OFF ON The number of digits in the extension number Must be set for 2 when installed on SDBS Default Swi...

Страница 57: ...ons Clear the following function setting on VAU port extensions 1 Absence Message 2 DND 3 Call Forward 4 Station Lockout 1 3 can be cleared from the operator by entering the following On Off CONF VAU extn no Lock out can only be cleared by plugging in a keyset and dialling On Off 74 Lock Code On Off ...

Страница 58: ...ividually Loop each collection of wires through an EMI filter and snap it shut Then pass the cables through a second filter at the exit of the system and snap it shut Repeat for each set of wires from each card 2 If the DASSII interface is being used fit EMI filters as described in the DASS II Interface installation section of this manual 3 If the doorphone interface or external paging adapter are...

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