# Presentation: 091667

## Wireless Application & Dial - In

**Wireless Application & Dial - In**

- Objective:  To streamline the Local Are Network (LAN) by avoiding the problems inherent to physical cabling and provide remote access to information.
-  An overview of wireless LAN alternative systems discussing the pluses and  minuses of each alternative.
-  An overview of the relative economics and performance characteristics of each alternative system.
-  A discussion of real world experiences with alternative systems.
- A review of alternative dial - in systems and their characteristics and relative costs.

## Integrated LAN Worlds

- Wireless LANs

- Computer telephone integration

- Global Area Networks

**Integrated ****LAN**** Worlds**

- Wired LANs

## Moving Data over Wireless LANs

- Moving Data over Wireless LANs

- Data transactions

- Wireless Network

- Wireless input devices

- Server

## Wireless - to - Wired Couplings

**Wireless - to - Wired Couplings**

**Wired World**

**Wireless World**

## The Wireless LAN Equipment Spectrum

**The Wireless ****LAN**** Equipment Spectrum**

- Laptop computer

- Printers

- Pen computer

- Personal computers

- Servers

- Wireless transceiver

- PDA

## The Mobile Client Spectrum

**The Mobile Client Spectrum**

- Laptop computer

- PDA

- Telephone

- Portable FAX

- Pocket organizer

- Pen computer

## Wireless LAN Peripherals

- Optical storage

- Modems

- Printers

**Wireless ****LAN**** Peripherals**

- PCMCIA

- Intelligent Cards

- Disks

- Writing pads

## Performance issues

-  Minimal errors
-  Availability
-  Throughput
-  Speeds
-  Reliability
-  Transfer rates
-  Authentication
-  Costs

-  Connectivity
-  Interoperability
-  Expandability
-  Flexibility
-  Stability
-  Consistency
-  Adaptability
-  Dynamics

## WIRELESS LAN DECISIONS

-  **USAGE**
** ****LOCATIONS TO COVER**
** ****FACILITIES**
** ****CONDITION**
** ****SPACE UTILIZATION**
** ****AGE**
** ****PRIOR MODIFICATIONS**
** ****PHYSIOLOGY**
** ****SPATIAL CONFIGURATIONS**
** ****BASIC SERVICE AREAS**
** ****EXTENDED SERVICE SET**

## WIRELESS LAN ADVANTAGES

** ****FLEXIBILITY TO SUPPORT PREVIOUSLY EXCLUDED****   APPLICATIONS AND USERS**
** ****EASE OF INSTALLATION**
** ****EASE OF MODIFICATION**
** ****MOBILITY**
** ****PORTABILITY**
** ****INTERCONNECTABLE**
** ****EXPANDABLE**
** ****EASILY SEGMENTED**
** ****ECONOMICS**
** ****TRANSPARENCY**
** ****REUSABILITY**
** ****BROAD RANGE OF COVERAGE AND OPTIONS**

## WIRELESS LAN FRUSTRATIONS

-  **LACK OF RELIABILITY**
** ****ERRORS**
** ****LONG WAITS**
** ****INCOMPLETE RETURNS**
** ****CONTENTION**
** ****SLOW RESPONSE**
** ****UNPREDICTABLE TIMINGS**
** ****INSTABILITY**
** ****VARIABLE SPACE COVERAGE**

## WIRELESS LAN FLEXIBILITIES

** ****INTEROPERABILITY**
** ****FUNCTIONALITY**
** ****TRANSPARENCY**
** ****PORTABILITY**
** ****ANYWHERE - ANYTIME**
** ****PERSONAL SUPPORT**
** ****INTERACTIVITY**
** ****FLEXIBILITY**
** ****EXPANDABILITY**
** ****INTEGRATION**

**WIRELESS ****LAN**** FLEXIBILITIES**

## Wire Versus Wireless Factors

**Wireless**
-  Mobility
-  Portability
-  Field operations
-  Roaming
-  Variable
-  Dynamics
-  Emergencies
-  Changeable

**Wire Versus Wireless Factors**

**Wired**
-  Fixed operations
-  Non-changing
-  Regular work cells
-  Sit down activities
-  Telephone operations

## Wireless LAN Services

**Wireless ****LAN**** Services**

- Client

- Server

- Outputs - answers

- File Transfers

- Queries

- Transactions

## Usage Considerations

**Mobile Computing**

**Transactions**

**Data Shipments**

**Messages**

**User**

**Usage Considerations**

**Queries and References**

## Facility Evaluation Factors

- Area

- Distance

- Age

- Height

- Obstructions

- Construction

- Wireless
- LAN
- Usability
- Factors

**Facility Evaluation Factors**

## Wireless LAN Distance Comparisons

- 0

- 50 ft

- 100 ft

- 250 ft

- Local wireless LAN distances

- 0

- 1 mile

- 2 miles

- 15 miles

- Long distance wireless LANs

**Wireless** **LAN** **Distance Comparisons**

## Impact of Location Variations

**Open environment**

**Restricted environment**

**Impact of Location Variations**

## User Mobility Limits

**Obstructions**

**Signal breakers**

**User Mobility Limits**

**Coverage area**

**Walls**

## Equipment selection criteria

-  Functionality
-  Flexibility
-  Error management
-  Scalability
-  Expandability
-  Performance
-  Vendor support

-  Software facilities
-  Integration support
-  Interoperability
-  Ease of setup
-  Ease of use
-  Application interfacing
-  Management services

## The Wireless LAN Software Layers

- System Mgmt.

- Event Logging

- Database Management

- Transaction Handling Software

- Network Operating System

- Wireless Services Software

- User Application Software

**The Wireless ****LAN**** Software Layers**

## Limiting the Traffic Volume on Wireless LANs

**Limiting the Traffic Volume on Wireless ****LANs**

- News extracts

- Balanced flows

- Small packages

- Short transactions

- Burst messages

## Wireless LAN Security Concerns

**Wireless ****LAN**** Security Concerns**

- Hacker

- Message Changing

- Signal tapping

- Corruption and disruption