LG Electronics LKD-8DS, GDK-20W installation manual Fading

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GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM

BS

corridor

 

corridor

Figure 3.6.12 Maximizing Line of Sight

Fading

Fading refers to the attenuation caused when a signal is reflected and receiving antenna receives multiple instances of the signal. A direct signal is always stronger than a reflected signal.

Base station is designed with two antennas and the capacity to choose the best suited antenna for carrying the strongest signal. This design minimizes chances of fading.

Although signals can travel around corners, you should place base stations so that signals begin their paths with a clear line of sight as illustrated in Figure 3.6.12 and then bend to travel to a receiving antenna. It limits the effect of signal fading.

Shadowing of the radio signal

The following items may well cause shadowing of the radio signal:

zThickness of walls, especially cavity walls and reinforced concrete walls.

zWindows or glass in doors with steel wire reinforcement or metallic reflection film.

zSteel doors, lift shafts, partitions or walls.

zFire resistant doors

zA wall of steel cabinets, large computer equipment or machinery.

zThickness of concrete floors.

Traffic Guidelines

Each base station supports four simultaneous calls, but because all users are not simultaneously in call statistically, a base station can support a greater number of wireless terminal users in practice.

Number of Cell

Recommended Number

Number of maximum

(Base station)

of Registered Wireless

Simultaneous Wireless

Terminals

Conversation

 

1

 

4

2

20

8

3

 

12

 

 

 

[Table 3.6.3] Suitable Wireless Terminal Number according to Base Station Number

50

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Contents Digital Wireless Key Telephone System Installation Manual Revision History Table of Contents Admin Programming Purpose Regulatory InformationReplacement of Lithium Batteries Hearing AID CompatibilityPictures Interference and AttenuationAbbreviations Introduction System Capacity Isdn BRIPMU MFBIsdn STASystem Specifications 1 Dimensions & Weights Height Width Depth4 Electrical Specifications AWG Wire Flash MemorySystem Components LcobespKey Service Unit KSU Main Board Unit MBUProgram Module Unit PMU Ring Generation UnitRGUWireless Terminal Interface Board Wtib Interface Board STIB2Interface Board Stib Dvib Digitized Voice Interface Board Site Preparation General Site ConsiderationsBack-Board Installation Verify On-Site EquipmentKSU & Power Installation Mounting the KSUPower Installation 2 KSU Mounting Holes & Installation layoutKSU Grounding PCB Installation PCB Handling & General InstallationMain Board Unit MBU Installation 2 MBU Installation OFF PMU Installation RGU Installation MFB InstallationIsdn STIB2 & Stib S/T Interface Board Installation SW1CN2 SW2 SW1 CN2SW2 SW2Wtib Wireless Terminal Interface Board Installation Dvib Digitized Voice Interface Board Installation11 Connectors of the Dvib System Wiring Battery Back-Up Wiring InstallationMusic on Hold MOH Wiring General Purpose Relays WiringAlarm Detect Port Wiring Ferrite Core Installation4 Ferrite core on signal wires Overview of the Dect system Components of the Dect system1 Components of a Dect system GDK-20W Digital Wireless Key Telephone System Wtib Wireless Terminal Interface BoardBase Station GDC-200B How to make Calls Before Making Initial CallControlling a Call Terminating a CallGDK-20W Dect Base StationAntenna Diversity Subscription Low Battery Alarm 8 Single-Slot Charger 330-SSC, 340-SSC System Configuration Before InstallationSite Survey 9 Base Station Service Area Base Station Broadcast Range and LocationCRSCell-Coverage Region Survey Tool General GuidelinesDistance Fading Rssi Monitoring Possible in GDC-335H only Reporting ResultsCheck list for Survey Data Dect Survey Report Template Number KoreaExamples Example 1 Centralizing Base StationsExample 2 Base Station Coverage in Adjoining Areas Example 3 Maximizing Line of Site 15 Location of Base Station in Office EnvironmentHardware Installation Equipment CheckUnit Installation Wtib Installation18 Wall Mounting of Base Station without wedge 20 LCD Message of Unsubscribed GDC-335H GAP and GDC-340HGAP User subscription/desubscription System IDAuthentication Code ConditionsUser Subscription At the GDC-335HAC code + User Desubscription At the GDC-340H Menuup or Down Summary of Dect Installation Isdn Description StibBasic Features of Isdn Device S-Interface GDK-20W Digital Wireless KEY Telephone System Features of Isdn CO Line T-Interface Unknown / National Type / International / Subscriber System Capacities GDK-20WRemark Feature Codes Numbering PLAN*1TRANS/PGM+#4 MON+DND/FOR+7MON+DND/FOR+# TRANS/PGM+*1Features Basic Extension Remarks Basic and Extended Numbering PlansLCD Months SLT, DND SLT/WHTU*2Audible Signals Tone / Ring CadenceSLT SLT Ring CadenceFrequencies and Tones GDK-20W Digital Wireless KEY Telephone System GDK-20W Configuration GDK-20W Station Configuration with LKD 2BMaximum Number of Stations in GDK-20W 34 Ports Maximum Number of CO Lines in GDK-20W 8 PortsWireless Cell / Terminal Configuration Number of Ports Default Number DescriptionMaximum Number of Ports Station / CO in GDK-20W 38 Ports Gain Controlsystem Basemain Menu 5 SUB MenuSLT Rx Gain Country Dktu SLT DCO CISSLT DCO To Enter the Programming Mode Admin Program Start Press Flex KEY1-12General Description IntroductionHOW to Program MAIN-MENUSUB-MENU TERMINAL-MENUExample of Admin. Program ProcedureDND YESButton Definition Station AttributeAdmin Programming Admin Programming IndexFlex KEY Main Menu SUB Menu SYS PGM SYS TMRUCD Default Values SUB Menu Flex KEY Terminal Menu Range Default RemarkLoop SUB Menu Flex Terminal Menu Range Default Remark KEY PBX / COIsdn CO Colp DidrnFlex SUB Menu Terminal Range Default Remark KEY 2.3 Isdn Program Main MenuSYS / EXC DID/DISASmdr Dktu Dtmf RXTone MUSIC1YES/NO DVU SUB Flex SUB Menu Range Default Remark KEY TimerFlex KEY SUB Menu Terminal Menu Default Remark Flex KEY SUB Menu Range Default Remark Disable Override AlwaysLDT DMT2.10 Hunt GROUP/VOICE Mail Program Main Menu