Toshiba Strata Dk14, Dk40i, Dk424 Installation And Maintenance Manual

							Hospitality Management Information System (HMIS)
Troubleshooting
Strata DK I&M    5/9915-85
3. Click the View 
History button.
This displays:
4. Click Okay.
Important!Be sure to check the History On box before exiting 
this window.
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							Hospitality Management Information System (HMIS)
Troubleshooting
15-86Strata DK I&M    5/99 
						

							Strata DK I&M 5/9916-1
Strata AirLink Systems
Strata AirLink Systems16
This chapter describes Strata AirLink™ wireless systems. There are two available configurations:
©Strata AirLink External Wireless System – The basis for this system is the Base Station 
Interface Adapter (BSIA) system that interfaces to Strata DK systems and many non-Toshiba 
systems using the standard telephone ports.
©Strata AirLink Integrated Wireless System – The basis for the integrated version is the 
RWIU system that interfaces to Strata DK16, DK16e, DK40, DK40i, DK280, and DK424, 
using a proprietary RWIU Printed Circuit Board (PCB).
Strata AirLink operates in single building and campus environments in the 1920~1930 MHz band. 
This bandwidth is designated by the Federal Communication Commission (FCC) for unlicensed 
operation, and an FCC license is not required to install and operate the system.
System Components
The BSIA system supports up to two Base Stations and one BSIA or controller. The RWIU system 
supports up to four Base Stations and interfaces directly to the Strata DK system without using a 
controller. Both systems support up to 32 handsets.
Each Base Station (see Figure 16-1) provides 
4 or 8 simultaneous speech paths and up to 
320,000 square feet of calling coverage for 
either system. Since handsets are not in 
continuous conversation, a system can 
support more than 8 handsets, up to a 
maximum of 32. Multiple systems can be 
active simultaneously.
The Base Station has radio transmitters and 
receivers that relay calls between the BSIA or 
RWIU, handsets, other telephones and trunks. 
It has four external antennas that enable the 
best choice for receiving and transmitting the 
strongest signal.
The Base Stations can be mounted on walls or ceilings up to 2,000 feet from the system, using 
twisted-pair continuous cable. They receive power directly or locally. If powered locally, they can 
be installed up to 3,300 feet from the system. LEDs provide diagnostic information for System 
Administrators or technical personnel (see Table 16-22 on Page 16-66).
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Antennas
LEDsAntennas
Figure 16-1 Base Station 
						

							Strata AirLink Systems
Pre-installation
16-2Strata DK I&M 5/99
In typical office environments, each Base Station has a 
broadcast range (see Figure 16-2) of up to 300 feet. 
They can also be placed one meter apart in the same 
coverage area to increase traffic capacity without 
interference.
The Base Station software is easily upgraded from the 
BSIA or RWIU, simplifying system administration 
and eliminating the need to remove the Base Stations 
for system upgrades.
The handset is small, lightweight, and easy to use. Its 
Liquid Crystal Display (LCD) shows alphanumeric 
information and icons that report status. It has many 
features depending upon the interfacing telephone 
system. The handsets used with the RWIU system 
have many of the same Strata DK Digital Telephone 
(DKT) features.
Unique Electronic Serial Numbers (ESNs) are 
programmed into the handsets at the factory and are automatically configured the first time a call is 
made.
Pre-installation
This section provides common step-by-step pre-installation procedures and several sample 
configurations for both Strata AirLink Wireless systems. The configurations range from a single 
system with one or two Base Stations to multiple-overlapping systems. The anticipated coverage 
of 320,000 square feet per Base Station and a maximum number of 32 users for each system was 
used to layout the samples.
It is highly recommended that a site survey and BER test be conducted to assist in the careful 
planning of Base Station placement, ensuring the highest possible quality of coverage. The survey 
should include:
©Location of Base Stations
©Maximum broadcast range required from any Base Station
©High traffic areas and general coverage areas, such as conference rooms, cafeterias, and 
manufacturing floors
©Obstructions between Base Stations and handsets
©Office locations and number of handsets within each location
©Construction materials used in walls, including the insulation, and floors between multistory 
buildings
©Window coatings and coverings
©Large metal objects, such as equipment, doors, and fluorescent lamp shades
©Distance of Base Stations from the BSIA or RWIU
There are special installation requirements to meet Underwriters Laboratories (UL) 1459 
regulations in the United States that are explained in the “Underwriters Laboratories (UL)” on 
Page 16-91.
Base Station
Broadcast Range - 300 Feet
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Figure 16-2 Broadcast Range 
						

							Strata AirLink Systems
Pre-installation
Strata DK I&M 5/9916-3
Strata AirLink Systems
Step 1: Check the System Hardware and Software Requirements
Table 16-1 lists the minimum hardware and software that your PC must have to use the Strata 
AirLink Manager software.
Important!Windows 3.11/3.1 is a 16-bit application and the Manager software is 32-bit. To run 
the Manager software, a special 32-bit support expansion is required.
Step 2: Review System Component Placement
A review of component placement before installation will help to reduce or eliminate attenuation. 
Attenuation is loss of RF signal strength due to distance, antenna positioning, and/or obstructions. 
The loss is measured in decibels (dBs).
Increases or reductions of three dBs result in doubling or halving signal strength. Try to limit the 
total loss to 100 dBs (see Figure 16-3).
Figure 16-3 Loss of Signal Strength by Distance (Direct Line of Sight)
Table 16-2 shows attenuation obstruction caused by common materials in a building. 
Table 16-1 Hardware and Software Requirements
MinimumRecommended
Hardware386DX 33 MHz 486DX2 66 MHz
Hard Drive 1.5MB 3MB
Random Access Memory 
(RAM)4MB 8MB
Video VGA SVGA
Mouse Any supported by Windows Same
Floppy Drive 1.44 MB 3.5 inch Same
SoftwareMicrosoft Windows 3.11/3.1 Windows 98/95
Table 16-2 Signal Attenuation Obstruction
ObjectApproximate 
dB Loss
Concrete 20
Concrete with metal siding 30
Brick 15
Plaster 10
Walls with windows 10
Walls with metal coating 20
1 10 20 50 100 -30
40-50
60-62
72-78
88-90
100
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Power:
Loss:
Base
Station
Distance in MetersdB 
						

							Strata AirLink Systems
Pre-installation
16-4Strata DK I&M 5/99
lTo reduce or eliminate attenuation and fading
1. Begin the signal path without obstructions even 
though signals can travel through obstacles (see 
Figure 16-4).
2. If obstructions cannot be avoided, do not place 
the Base Stations:
©On or near metallic objects or on walls that 
have metallic content such as metal girders 
or foil-backed insulation. 
©Near large obstructions; for example, doors 
that could temporarily obstruct antennas 
when the doors open.
3. Place components in locations that ensure clear 
line of sight signaling between the Base Station 
and handset.
NoteIn general, for optimum coverage and reduced signal fading, it is recommended that the 
coverage by the Base Station overlap by approximately 25 percent. Base Stations are 
designed to automatically use frequencies that are not already in use, so interference 
between the Base Stations is not a problem.
4. Plan coverage for each floor separately in multi-story environments. A single Base Station can 
support multiple floors. The guidelines for ensuring proper broadcast ranges and maximum 
traffic must be followed.
5. Consider the high traffic areas and install the number of Base Stations required to meet the 
estimated traffic demand. When multiple Base Stations are needed in the same location, you 
can mount Base Stations as close as one meter apart.
Each Base Station can support eight or 
more simultaneous conversations. Figure 
16-5 shows 2 Base Stations supporting 
32 handsets in a manufacturing area.
6. Use corridors because they can act as 
natural pathways for RF signals. When 
trying to cover two types of areas, place 
a Base Station near a corridor to 
optimize coverage in both areas.
NoteHandoff does not operate between 
Base Stations connected to different 
wireless systems.
Venetian blinds
Open
Closed10
20
Soft partitioning 3 to 4 Table 16-2 Signal Attenuation Obstruction
 (continued)
ObjectApproximate 
dB Loss
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Base StationCorridor
Corridor
Figure 16-4 Maximum Line of Sight
320
Concrete
Concrete
Manufacturing Floor
(32 handset users) Base
Station 1Base
Station 2
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Figure 16-5 Increasing Traffic Capabilities 
						

							Strata AirLink Systems
Pre-installation
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Strata AirLink Systems
Step 3: Review Possible System Configurations
It is highly recommended that you follow the installation guidelines and examples in this step. The 
maximum number of Base Stations that the BSIA system supports is two, and the RWIU system, 
four.
Some configurations are:
©Single BSIA system with two Base Stations (see Figure 16-6) or single RWIU system with 
four Base Stations (see Figure 16-7). The Base Stations are placed in locations that optimize 
the requirements of the system. For example, the Base Stations could be placed in the same 
general area or on separate floors, but with overlapping coverage
Figure 16-6 BSIA System with Two Base Stations
Figure 16-7 RWIU System with Four Base Stations
Base Station 1
Base Station
Broadcast Area
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Base Station 2
BSIA
Base Station 1
Base Station
Broadcast Area
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Base Station 2
Base Station 3Base Station 4
Strata DK
RWIU 
						

							Strata AirLink Systems
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©Multiple BSIA systems as a single system (see Figure 16-8)
Figure 16-8 Multiple BSIAs in One System
This configuration creates a system with greater coverage area. The handsets must be 
programmed with both system IDs. Users can place and receive calls, although handoff does 
not automatically operate between Base Stations connected to different BSIAs. Manually 
invoke handoff by using 
)/6+ to hold the call while moving between Base Station 4 and 2, 
for example.
System Identification numbers (SIDs) for both BSIAs must be programmed in the handset for 
this operation.
©Multiple overlapping systems (see Figure 
16-9).
Multiple overlapping configurations create 
a system with greater user capacity. This 
configuration works for the BSIA or RWIU 
systems.
Use Table 16-3 to determine how many 
Base Stations are needed to accommodate 
the numbers of users at different traffic 
levels.
NoteIt is assumed that users have access to 
all Base Stations in a high-traffic 
environment where only one call is 
blocked out of 100 attempts.
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Base
Station 1 Base Station Broadcast Area
Base
Station 2
BSIA 1
Base
Station 3Base
Station 4
BSIA 2 Double punch down
to BSIAs 1 and 2
Analog lines (32) 
from the office
telephone system
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Base Station
Broadcast Area
Base Station 1
Base Station 3
Base Station 2
Base Station 4
Strata DK
RWIU
Strata DK
RWIU
Figure 16-9 Multiple Overlapping Systems 
						

							Strata AirLink Systems
Pre-installation
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Strata AirLink Systems
©Factory with adjoining offices 
(see Figure 16-10).
Both Base Stations are placed in 
the factory area to accommodate 
the greater number of users in 
that area.
Place Base Station 2 closer to 
the offices, maximizing line of 
sight signal through the 
doorway. 
This is especially important if 
the wall between the offices and 
factory is concrete.
The Base Stations are also 
mounted on the ceilings and 
away from any potential 
obstructions to the antennas.
If a second area was available to the left of the factory, moving Base Station 1 to that location 
would broaden the coverage to users in that area also.
Table 16-3 Base Station Traffic Requirements
Erlangs1 
Per User
1. Typical usage assumes .1, .15, and .2 Erlangs (6 minutes, 9 minutes, and 12 minutes, respectively, where 1   
Erlang equals 60 minutes of usage) per line during the busiest hour of the day.
Number
of UsersTo t a l  
ErlangsEquivalent 
CCS2
2. CCS stands for centi-call seconds, or 100 seconds of telephone conversation.
Required 
ChannelsBase Stations 
Required
.110 1 36 5 1
20 2 72 6 1
30 3 108 8 1
32 3.2 115.20 8 1
.1510 1.5 54 6 1
20 3 108 8 1
32
3
3. Assumes Base Stations are co-located.4.8 172 11 2
.210 2 72 6 1
16 3.2 115.20 8 1
32
36.4 230.4 13 2
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320
168Concrete
Concrete
Factory Floor
(32 handset users)
Base Station 2
(wall mounted) Base Station 1
(ceiling mounted)
200
140
Offices
Front
Door
Figure 16-10 System with a Factory and Adjoining Offices 
						

							Strata AirLink Systems
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©Manufacturing plant (see Figure 16-11).
The entrance from the manufacturing area 
into the cafeteria is a high-traffic area.
Placing a Base Station in the entry area of 
the cafeteria blocks the line of sight to the 
other areas in the cafeteria.
Locate Base Station 2 centrally in the 
cafeteria and Base Station 1 in the 
manufacturing area. Align Base Station 2 
with the entrance of the cafeteria to 
provide coverage into that area.
©Cubicles, walled offices, and 
conference rooms (see Figure 16-12).
Although the number of Base Stations 
in this environment would depend on 
the number of handsets, the Base 
Stations are aligned with corridors to 
maximize the line of sight.
Instead of placing both Base Stations 
close to each other, place Base Station 
1 near the conference rooms and 
entrance area to accommodate greater 
potential traffic in these areas.
Step 4: Unpack the Shipment
1. Inspect all packages carefully and note any visible damage when the system first arrives. If 
any damage is found, do not open the packages. Contact the delivery carrier immediately and 
make the proper claims.
2. Unpack all of the packages.
3. Be sure to retain the original packaging materials for re-use when storing or transporting the 
system components.
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Cafeteria
Offices
Concrete
Manufacturing Area
Base Station 1
Base Station 2
Figure 16-11 System in a Manufacturing Area
2978Main
Entrance
Cubicle
Area Cubicle
AreaConferenceRooms Conference
Rooms
Walled Offices
Walled Offices
Base Station 1
Base Station 2
Figure 16-12 Office Area with Cubicles and Walls