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Part 1: Site Survey and Overview of DECT Systems

15

Erlang = E.
3 calls per hour, lasting 3 mins (3 calls x 3 mins)/60 min = 0.15 E
40 x 0.15 = 6 E
With 1% rejection, 6 E equals 12 channels according to the Erlang table (

A Base Station has 4 channels: 12/4 = 3 Base Stations per cell (Figure 1.4)

Troubleshooting with Base Stations

Here are some examples of situations in which problems such as lost calls, bad call
quality or not being able to go off-hook may occur.

Example 1: Several small overlap areas

If you are in an area with a lot of small
overlaps and you are moving in a given
direction, there is a risk of losing the call
because the Base Station which the
handset has as its alternative may not
necessarily be the Base Station that
you are moving towards. This can be
solved by placing a Base Station in the
middle of the area.

Figure 1.4

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Содержание DECT 500

Страница 1: ...SAMSUNG DECT 500 1500 Product Name Installation and Programming Product Name Manual ...

Страница 2: ...ant Disclaimer Samsung Telecoms is not responsible for errors or problems arising from users not installing or programming their Samsung systems as described in this manual Copyright 2004 Samsung Telecoms UK Ltd All rights reserved No part of this manual may be reproduced in any form or by any means graphic electronic or mechanical including re cording taping photocopying or information retrieval ...

Страница 3: ...998 Protection requirements with respect to electromagn compatibility 3 1 2 Article 3 1 b EN 50081 1 EN 50082 1 Other relevant harmonised standards CTR10 CTR22 The relevant declarations for the DECT 500 and DECT 1500 systems can be obtained from Samsung Telecoms UK Ltd at the address shown at the end of this guide Intended Use This DECT telephone handset is intended to communicate with a Sam sung ...

Страница 4: ...urvey Report Form 8 Example Cell Planning Results 9 Positioning Base Stations 12 Using the Demonstration Base Station 12 Hot Spots 13 Final Testing 14 Traffic Measurement 14 Troubleshooting with Base Stations 15 Using Repeaters 17 Introduction 17 Function of Repeaters 18 Repeaters in Multi Cell Systems 19 Areas with Low Traffic Intensity 21 Displacement of Traffic Capacity Using Repeaters 22 Repea...

Страница 5: ...erial Connection 30 Installing the CCFP 30 Installing RFPs Base Stations 30 Starting the DECT 1500 System 32 DECT 500 33 Hardware Configuration Overview 33 Setting Optional Password Protection 33 Installing the Base Station Control Unit CCFP 34 Starting the DECT 500 System 35 Registering Handsets 35 Installing and Configuring a Samsung Repeater WRFP 38 Appendix 1 Deployment Flowchart 41 Appendix 2...

Страница 6: ...ove existing Base Stations Repeaters 4 Register handsets Part 1 describes the site survey and provides a detailed overview of the various components of your DECT system including how Base Stations and Repeaters should be positioned to provide optimum performance Part 2 provides information on procedures to install and configure the hardware components for each system CCFP Base Stations handsets et...

Страница 7: ...the expected number of users and the required coverage area should be made In par ticular How many handsets are expected to be used now and in the future How many calls are made and how long is the average call Is it necessary to have 100 coverage Before Starting the Survey Due to the nature of radio waves wireless telecommunication to a large extent de pends on the environmental characteristics o...

Страница 8: ...erference caused by objects such as trees walls and glass Try to install in an open environment where masking by objects is minimised Refer to Table 1 for details Table 1 Radio Interference by Materials Material Approximate Loss in dB Glass 2 Glass metal reinforced grid 10 Glass metal clad sun guard 10 Wall indoor wood 2 Wall brick 10cm 3 5 Wall concrete 15cm 9 Wall concrete 20cm large windows 6 W...

Страница 9: ...onstruction materials used in walls and doors of the building s including window coating and covering if any Also note any large metal objects such as equipment doors and fluorescent lamp shades In general radio frequency RF signals are attenu ated to some degree when passing though materials Some materials such as metal at tenuate RF signals to a higher degree See Table 1 above y Define the numbe...

Страница 10: ... be clear on what floor the Base Station was positioned and that the result may be several cell contours on different floors 5 Using the following numbering conventions name the Base Stations and cells and mark them on the map y xRyy refers to the identity of the Base Station where x is the level 1 is basement 0 is ground 1 is the 1st floor etc R means this is a Base Station yy is the Base Station...

Страница 11: ...areas where radio coverage is not necessary or which are to be excluded from radio coverage Also list areas where radio coverage is not feasible or requires spe cific Base Stations Keyphone System Type and location of keyphone system e g OfficeServ 500 Reporting Site Survey Results It is important to make a comprehensive survey report that records site survey results and provides useful informatio...

Страница 12: ... placed This can be marked on the survey map but additional information such as height and fixing instructions should be included where appropriate y A specification of the areas that will be covered by the Base Stations and areas that may cause problems This can be useful when testing the system The theoretical maximum number of overlapping cells is 10 if all time slots and frequencies are used I...

Страница 13: ...t may be useful 6 Connections to Base Stations list of planned Base Stations with approximate cable length and type and whether existing wiring can be used or new cabling is re quired 7 Type and location of keyphone system description location and system configuration 8 Existing cabling indicate what cabling is available and how it is distributed across the site 9 Base Station installation for eac...

Страница 14: ...Part 1 Site Survey and Overview of DECT Systems 9 Example Cell Planning Results Survey Map of the 1st Floor ...

Страница 15: ...Part 1 Site Survey and Overview of DECT Systems 10 Survey Map of the 2nd Floor ...

Страница 16: ...Part 1 Site Survey and Overview of DECT Systems 11 Survey Map of the 3rd Floor ...

Страница 17: ...ecially in buildings with a steel roof steel girders and or large air shafts in the ceiling there is a risk of gaps in the coverage area This is party due to shadows and or reflections The design of the building and especially equipment made of metal shelving racking machinery etc may effect the radio signals a great deal For example in a warehouse where goods are moving in and out constantly the ...

Страница 18: ...tation should be placed in the position position 3 in which the RSSI value is 65 and has a stable Q value of 52 from the measured survey and the demonstration Base Station in positions 1 and 2 Then the survey and demon stration Base Station can be moved to positions 4 and 5 The measuring process can be repeated and the permanent Base Station is placed in position 6 Hot Spots It is possible to have...

Страница 19: ...one by means of the test display on a handset It will be necessary to move between the coverage areas of the different Base Stations to determine whether a handset can see the different cells Traffic Measurement When the cells and radio coverage are in place the traffic must be calculated for each cell Figure 1 3 Map out where handset users are typically concentrated and calculate how many Base St...

Страница 20: ... Stations Here are some examples of situations in which problems such as lost calls bad call quality or not being able to go off hook may occur Example 1 Several small overlap areas If you are in an area with a lot of small overlaps and you are moving in a given direction there is a risk of losing the call because the Base Station which the handset has as its alternative may not necessarily be the...

Страница 21: ...e to reg ister to the other Base Station until you are out of the coverage area of the first Base Station The problem may be solved by moving one of the Base Sta tions closer to the corner point where the two passageways meet in order to cover both Example 3 No overlap In areas where the coverage between two Base Stations is separated by steel doors or gates the handset does not have time to hand ...

Страница 22: ...nd thereby extend the radio service of the traffic chan nels established with real Base Stations The normal method of establishing multi cell installations is to make pre installation site surveys to map the coverage and determine the number and location of Base Stations After the system is installed and tested gaps in the coverage may be found or different coverage may be required often in areas ...

Страница 23: ...er of traffic channels is neither increased nor reduced with the Repeater When an active handset moves from Area 1 to Area 2 Figure 1 5 the Repeater takes over the active traffic channel and the handset can move around within Area 2 within the coverage of the Repeater however as seen from the Base Station the Repeater is now the active handset When the active handset moves back to Area 1 and outsi...

Страница 24: ...tra channels Repeaters in Multi Cell Systems When a multi cell system is installed two considerations determine the number of Base Stations 1 Establishment of necessary radio coverage 2 The number of traffic channels must be available to secure good perform ance of DECT traffic To fulfil point 2 under normal circumstances one Base Station should be installed per 10 handsets In a busy office the sy...

Страница 25: ...e necessary radio coverage but problems with traffic capacity may arise The traffic capacity in the Repeater area is only 0 15E which does not mean that there can only be one active handset in the area The Repeater can handle two traffic channels and therefore two simultaneous calls and the probability that the Repeater is busy with traffic for two handsets 0 15 0 15 0 3E is more than 1 actually 3...

Страница 26: ...n only be used to a limited extent as a substitute for a real Base Sta tion since the Repeater does not increase the traffic capacity Therefore the correct procedure to installing a DECT system is to establish coverage of the primary areas with real Base Stations and use Repeaters in areas where the radio coverage is wanted but where the traffic intensity is low Areas with Low Traffic Intensity Th...

Страница 27: ...all number of Base Stations compared to the area of the building Displacement of Traffic Capacity Using Repeaters In multi cell installations it may be necessary to establish high traffic areas depending on working cond itions and movement patterns An example would be a meeting room or canteen The task can be achieved by installing more Base Stations covering the same area and increasing the chann...

Страница 28: ... may depend on humidity or building material Therefore a DECT system must be installed with a security overlap between coverage areas which can cause a rise in overall installation costs Repeaters are excellent tools for adjusting multi cell installations they are easy to install and move as they need no cabling Installation of Repeaters with External Directional Antenna The Repeater can be instal...

Страница 29: ...ntenna on the first Repeater There are only two traffic channels in the Repeater covered area as there must be space for any handovers This configuration can be used to expand the coverage area of a Repeater installa tion but only in areas with very low traffic demand as the total area will have to share two traffic channels Figure 1 15 External antenna Repeater jump traffic 0 15E Distance approx ...

Страница 30: ...mprises a Central Control Fixed Part CCFP up to 16 Radio Fixed Parts RFP or Base Stations and Portable Parts PP handsets It may also include up to three Repeaters WRFP per Base Station i e up to 48 per system A PC is also con nected to the CCFP via the RS 232 serial port for configuring the system using the administration program Figure 2 1 DECT 1500 System Up to 64 Handsets RFP Base Station WRFP ...

Страница 31: ...ndsets Eight IWUs are therefore required for 64 handsets The main board handles eight RFPs The expansion board is required if more than eight RFPs are needed The number of RFPs depends on the traffic den sity and the coverage area One RFP can handle four simultaneous handsets calls The Link card is used to connect two 1500 systems together It installs in slot 10 of the extra slots A combined syste...

Страница 32: ...nsion board If the CCFP has an older software version it is necessary to upgrade the sys tem Upgrade software is not included in expansion kit PN 13816 1 Disconnect the CCFP from its power supply 2 Remove the top cover 3 Remove the blind cover plates 4 Mount the expansion board on the CCFP by inserting the two plastic pins Figures 2 2 and 2 3 5 Insert the IWUs starting at slot no 0 Figure 2 2 5 Mo...

Страница 33: ...se Conn 1 1 WHITE BLUE 0A 8A 14 BLUE WHITE 0B 8B 2 WHITE ORANGE 1A 9A 15 ORANGE WHITE 1B 9B 3 WHITE GREEN 2A 10A 16 GREEN WHITE 2B 10B 4 WHITE BROWN 3A 11A 17 BROWN WHITE 3B 11B 5 WHITE SLATE 4A 12A 18 SLATE WHITE 4B 12B 6 RED BLUE 5A 13A 19 BLUE RED 5B 13B 7 RED ORANGE 6A 14A 20 ORANGE RED 6B 14B 8 RED GREEN 7A 15A 21 GREEN RED 7B 15B 9 RED BROWN NC NC 22 BROWN RED NC NC 10 RED SLATE NC NC 23 SLA...

Страница 34: ...1B 2 RED SLATE 0 EARTH 16 BLACK ORANGE 1 EARTH 17 WHITE GREEN 2A 4 GREEN WHITE 2B 18 WHITE BROWN 3A 6 BROWM WHITE 3B 5 SLATE RED 2 EARTH 19 ORANGE BLACK 3 EARTH 20 WHITE SLATE 4A 7 SLATE WHITE 4B 21 RED BLUE 5A 9 BLUE RED 5B 8 BLACK BLUE 4 EARTH 22 RED BROWN 5 EARTH 23 RED ORANGE 6A 10 ORANGE RED 6B 24 RED GREEN 7A 12 GREEN RED 7B 11 BLUE BLACK 6 EARTH 25 BROWN RED 7 EARTH Power Connection Figure ...

Страница 35: ...d supports an tenna diversity The RFP can also carry out a handover between the RF channels under the same RFP and handles four DECT speech channels simultaneously The RFP is able to frame synchronise with other RFPs under the same CCFP Transmission length is up to 2 km on 0 5mm twisted pair e g cat 4 between the RFP and CCFP The RFP is also supplied with power from this connection maxi mum supply...

Страница 36: ...your installation This deployment tool consists of an RFP which has no need for a CCFP It can easily be moved around in the building and one to eight handsets can be connected 1 Pull the a b wire from your installation through the wall holder and then mount the wall holder on the wall 2 Connect the a b wire to the plug on the back of the RFP Use pins 3 and 4 on the RJ 11 connector 3 Ensure the RFP...

Страница 37: ...ctions are made to PABX lines 3 Connect a serial cable RS 232 between the CCFP and the PC installed with the administration software 4 Connect the power cable to the CCFP Ensure that there is an earth connec tion in the power supply plug 5 Power up the CCFP 6 Use the administration program to Configure the system Make a cable measurement to all installed RFPs Adjust IWU parameters as required Regi...

Страница 38: ...ional Password Protection An optional password protection feature can be enabled which requires a password to be entered before the administration program can be accessed The feature is dis abled by default by a plastic jumper mounted on the ALT connector on the CCFP main board Figure 2 8 To enable password protection remove the jumper from the connector and set a password using the administration...

Страница 39: ... 9V dc 2 Aux Input 2 Aux Output Line 0 line 1 line 2 line 3 line 4 line 5 line 6 line 7 Tip ring tip ring tip ring tip ring tip ring tip ring tip ring tip ring DCD RXD TXD DTR DSR RTS CTS GND RX RX TX TX GND NC NC 9V NC NC GND AUXIN1 GND1 AUXIN2 GND1 AUXOUT1 GND1 AUXOUT2 GND1 Future optional interfaces Hole 1 Hole 2 Hole 3 2 Aux 2 Aux RS422 9V DC RS 232 Output Input 16 a b For Future Use Figure 2 ...

Страница 40: ... subscription is allowed Slow flashing red means it is in operation with the maximum active connections busy Slow flashing green means it is in operation with active connections Steady green means it is in operation and ready for use with no active connec tions Registering Handsets Registering a Master Handset When switched on the DECT 500 system will automatically go into registration mode for a ...

Страница 41: ...andset 1 Press the MENU key and go to EXT SERVICE 2 Press the OK key and go to READ WRITE USERDATA 3 Press the OK key The serial number of the Master handset shows in the display 4 Press the OK key The handset asks for an extension number 5 Enter the extension number This can be the existing extension number for the corded phone being paired with the handset or any number available in the PABX if ...

Страница 42: ...ble in the PABX if the handset is being used as the only phone 7 Press the OK key The new handset is now registered in the system To register more handsets press the key to return to the registration menu and follow the same procedure Deleting a Registered Handset To delete the Master handset use the CCFP administration program To delete an additional handset either use the administration program ...

Страница 43: ...he Repeater Hand set Programming Tool PN 13821 and a PC use the instructions in part B A You will need the Repeater Handset Programming Tool running on a PC connected to the DECT system and documentation on how to connect the cables 1 Pull the wire from the power supply through the wall holder and then mount the wall holder on the wall 2 Connect the wire to the plug on the back of the Repeater and...

Страница 44: ...ht after pressing the Hook key or INT key a few times the Repeater is probably synchronised with another Base Station if this is the case the sub scription procedure should be repeated from step 2 5 Select the Radio Part Number RPN Hook off and press a number on the handset in the range 2 7 When the number is accepted by the Repeater this is acknowledged by the LED flashing the number of times cor...

Страница 45: ...n inspection tone is enabled The Repeater will then when relaying connections insert a short tone every two seconds in the audio path to handsets This feature can be used for inspection and verification of the Repeater placement When the operation has been verified the inspection tone should be disabled Performing step 2 only of the subscription procedure will disable the inspection tone When the ...

Страница 46: ...41 Appendix 1 Deployment Flowchart ...

Страница 47: ...er of DECT RFP Number of DECT channels Traffic in E with 1 busy rejection Number of PP handsets 0 15E 1 4 1 7 2 8 3 20 3 12 6 40 4 16 9 60 5 20 12 6 84 6 24 16 107 7 28 19 127 8 32 22 147 9 36 26 173 10 40 30 200 11 44 33 7 225 12 48 37 247 13 52 41 273 14 56 44 7 298 15 60 48 320 16 64 52 347 ...

Страница 48: ...Samsung Telecoms U K Limited Brookside Business Park Greengate Middleton Manchester M24 1GS ...

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