TANDBERG FieldView™ delivers the
most innovative solution in mobile video
collaboration.
Featuring integrated wireless LAN, high
resolution video and audio and the ability to
collaborate via instant on-screen annotation—
it’s the next best thing to having your experts
on the scene.
Its ability to access small spaces enables
productivity in areas previously inaccessible by
video, allowing organizations to address and
resolve issues instantly.
Recording capabilities enable device and PC
users to archive material for a later date or
collaborate over previously recorded material.
FieldView
Administrator
Guide
D14098.02 June 2008
Software version 3.1
The TANDBERG FieldView Device and the software
contained in and used with the TANDBERG FieldView
Device is subject to the following notices:
Patents Notice: United States Patent # 7,221,386, together
with additional patents pending in Canada, the United States
and other countries, all of which are in the name of LibreStream
Technologies Inc.
TANDBERG is a registered trademark of Tandberg ASA. All other
trademarks are the property of their respective owners.
About this document: All rights reserved. This document contains information that is proprietary
to TANDBERG. No part of this publication may be reproduced, stored in a retrieval system, or
transmitted, in any form, or by any means, electronically, mechanically, by photocopying, or
otherwise, without the prior written permission of TANDBERG. Nationally and internationally
recognized trademarks and trade names are the property of their respective holders and are hereby
acknowledged.
The system provides mobile real-time video conferencing for locations that
are usually not accessible with standard video conferencing equipment. This
includes locations such as test labs, health care facilities, factory floors, service
departments, remote suppliers, inspection areas, customer facilities, and other
remote work team locations.
This manual describes the setup and configuration of the Mobile Video
Collaboration System (FieldView). An Operator at a remote site uses the
TANDBERG FieldView Device to communicate with a FieldView Application
(TANDBERG FieldView Application) user over a network. The TANDBERG
FieldView Device allows both the Operator and the Client Application user to:
Converse just as they would on a cellular telephone.•
View and listen to streaming audio/visual output in real time. •
Capture and save snapshot images.•
Share snapshot images between the TANDBERG FieldView Application and •
TANDBERG FieldView Device.
Record and play back video.•
Adjust the controls on the TANDBERG FieldView Device (e.g., zoom, focus, •
lighting, etc.).
Draw on the video image.•
The TANDBERG FieldView Device allows technical experts and remote
operators to jointly view, consult, diagnose and resolve issues by sending
high-resolution video, sound, and still images through streaming multimedia
from the TANDBERG FieldView Device on the scene to a TANDBERG FieldView
Application on a PC workstation. The TANDBERG FieldView Device can also
stream video to a SIP-capable video conferencing system.
About This Guide
This guide describes how to setup and configure the FieldView. For information
on TANDBERG FieldView Device operation, please see the TANDBERG FieldView
Device User Manual. For information on the TANDBERG FieldView Application
software client application, see the TANDBERG FieldView Application User
Manual.
FieldView Architecture
The FieldView architecture consists of:
• The FieldView Device (TANDBERG FieldView
Device). This manual specifically refers to the
TANDBERG FieldView Device model.
The FieldView Application installed on a Microsoft •
Windows-based workstation.
Network infrastructure•
•
Wireless equipment such as access points
(AP)
•
Wired equipment (e.g. network switches)
Figure 1-1 Mobile Video Collaboration System (FieldView)
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Optional:•
•
FieldView Management Suite (FMS)
•
FieldView Enterprise Suite (FES)
•
NAT/Firewall traversal equipment
•
Session Initiation Protocol (SIP) Proxy/Registrar
Accessories, including:•
•
External power adaptor
•
External battery charger
•
Additional batteries
Overview of the TANDBERG FieldView
Device
The TANDBERG FieldView Device provides a mobile videoconferencing
platform. High quality video and audio from a remote site can instantly be
shared with a user in another location. The TANDBERG FieldView Device is
a small, handheld device that can be operated over a wireless network for
maximum mobility. The following illustrations provide an overview of the
features.
12 – S-Video
13 – USB host interface
14 – Ethernet port
15 – Stylus
16 – Viewfinder
17 – Send button
18 – End button
16
22
23
24
25
19
17
18
27
26
19 – Zoom/Manual focus controls
20 – Navigation pad
21 – Speaker
22 - Focus button
23 – Display mode button
24 – Recording On/Off
25 – Power
26 – Tripod mount
27 – Battery door
28 – Battery lock
28
20
21
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Overview of the TANDBERG FieldView
Application
The TANDBERG FieldView Application forms the communication partner
for the TANDBERG FieldView Device. Operating on a standard Microsoft
Windows workstation, the TANDBERG FieldView Application allows
users to collaborate with, monitor, and control the TANDBERG FieldView
Device.
Note: This document uses the terms PC, laptop, and workstation
interchangeably to refer to a Windows® based personal computer.
For additional information on the TANDBERG FieldView Application,
please see the TANDBERG FieldView Application User Manual.
TANDBERG FieldView Application Call Window
Overview of the FMS
The FMS is an application that assists the administrator with the maintenance
of the FieldView. It permits centralized monitoring of endpoint status as well as
providing a method to deploy common configurations, contact lists and remote
software updates. For more information on the FMS, consult the FieldView
Management Suite User Manual.
Overview of the FES
The FieldView Enterprise Suite provides a cost-effective licensing model for
the deployment of a large number of TANDBERG FieldView Application clients.
It permits users within an enterprise to share from a pool of available calling
licenses. For more information on the FES, consult the FieldView Enterprise
Suite User Guide.
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2. Installation
TANDBERG FieldView Device Installation
Power
The TANDBERG FieldView Device can be powered from an internal replaceable
battery or from AC power via an external power adaptor.
Battery Specifications
Part Number: 100229
Type: Lithium-Ion
Voltage: 7.2 VDC
Capacity: 2400 mAh
CAUTION
Risk of explosion if battery is replaced with an incorrect type.
Warnings
Do not remove the battery while the TANDBERG FieldView Device is •
operational as this may damage the TANDBERG FieldView Device. The
TANDBERG FieldView Device will attempt to shut down immediately if it
detects that the battery door has been opened.
Replace battery only with the same type as recommended by the •
manufacturer.
Dispose of used batteries according to the manufacturer’s product •
documentation and local disposal requirements.
Use only TANDBERG-supplied batteries with the TANDBERG FieldView •
Device. Use of other types may increase the risk of fire or explosion or
damage to the equipment.
Do not store the battery in places where metallic objects may come in •
contact with the battery terminals (e.g. in a pocket with keys, in a drawer
with paper clips, etc.). The resulting short-circuit can cause extremely high
temperatures that may damage the battery and cause burns or fires.
Do not attempt to disassemble the battery. The battery poses a burn hazard •
if handled improperly.
Immediately dispose of a damaged or leaking battery.•
Do not store or leave the TANDBERG FieldView Device or TANDBERG •
FieldView Device battery near a heat source (e.g. radiator, stove, heater,
automobile dashboard, etc.) as the battery may explode or ignite.
Battery Disposal
The TANDBERG FieldView Device uses a Lithium-Ion battery which must be •
disposed of properly.
The battery must not be disposed with household or office waste.•
Do not dispose of the battery in a fire as the battery may explode.•
Contact your local waste disposal agency for the address of the nearest •
battery disposal location.
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External Power Adaptor
The TANDBERG FieldView Device External Power Adaptor permits long term
operation without replacing batteries and will charge the battery that is
installed in the TANDBERG FieldView Device.
The TANDBERG FieldView Device requires that a battery be installed at •
all times when operating even if external power is available. This ensures
that the TANDBERG FieldView Device can safely shut down its internal file
system in the event of an unexpected loss of external power.
Software updates require external power to be applied to prevent potential •
problems caused by discharged batteries.
TANDBERG FieldView Device Input/Output
Interfaces
The TANDBERG FieldView Device features the following external
interfaces:
Headset Connector•
External S-Video Connector•
External Audio Input Connector•
Ethernet Connector•
Wireless Local Area Network (WLAN) •
SD slot•
Universal Serial Bus (USB) Host Connector•
Cradle contacts•
More information on these connectors and interfaces is provided in the
following sections.
Headset Connector. The headset connector accepts a standard 3.5 mm
3-wire headset plug.
S-Video Connector. A standard S-Video connector to connect to the video
source. Users can select either the internal video camera or an external video
source from an TANDBERG FieldView Device configuration screen.
External Audio Input Connector. The external audio input accepts a linelevel audio signal on a standard 2.5 mm plug. It can be used to provide subject
audio that will be synchronized and then streamed and/or recorded with the
video.
The audio level from a non-amplified microphone is too low to connect directly
to the audio input. Use an external microphone pre-amplifier to increase the
level to the required nominal 1 Vrms level.
Ethernet Interface. The 10/100Base-T network interface accepts a standard
RJ-45 Ethernet plug. The interface autosenses speed and duplex. The
TANDBERG FieldView Device is a Terminal device and must be connected to a
hub or switch.
Wireless Network Interface. The TANDBERG FieldView Device contains an
integrated IEEE 802.11b/g wireless network interface. The interface has the
following technical specifications:
Frequency band
B Mode: 2.400 – 2.497 GHz (Ch 1 – 14)
G Mode: 2.400 – 2.4836 GHz (Ch 1 – 13)
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Channel Spacing
B/G Mode: 5MHz
Modulation
B Mode: DSSS with DBPSK, DQPSK, and CCK
G Mode: OFDM with BPSK, QPSK, QAM, and 64 QAM, DSSS with
DBPSK, DQPSK, and CCK
Radio Power
B Mode: 13±1 dBm at 1, 2, 5.5, and 11 Mbps
G Mode: 12.5±1.5 dBm at 6, 9, 12, 18, 24, 36, 48 and 54 Mbps
Radio Sensitivity
G Mode: –82 dBm at 6 Mbps
–81 dBm at 9 Mbps
–79 dBm at 12 Mbps
–77 dBm at 18 Mbps
–74 dBm at 24 Mbps
–70 dBm at 36 Mbps
–66 dBm at 48 Mbps
–65 dBm at 54 Mbps
B Mode: –89 dBm at 1 Mbps
–86 dBm at 2 Mbps
–85 dBm at 5.5 Mbps
–82 dBm at 11 Mbps
TANDBERG FieldView Administrator Guide
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Secure Digital (SD) Slot. The SD slot holds an SD card that is used for
storing recordings, as well as performing configuration and software updates.
SD memory cards used with the TANDBERG FieldView Device must provide
sufficient performance in order to record audio/video streams. Suitable SD
cards are typically labeled as High Performance or High Speed but must meet
The SanDisk Ultra-II series of SD and SDHC cards have been tested with the •
TANDBERG FieldView Device and are recommended, although other brands
that meet the technical performance specifications should also be acceptable.
SD cards should be formatted using the TANDBERG FieldView Device. •
See the section SD Format. Cards formatted using other programs (e.g.
Windows XP format, etc.) may provide degraded performance.
Universal Serial Bus (USB) Host. A USB host interface is provided for future
growth.
Cradle Contacts. The contacts on the bottom of the TANDBERG FieldView
Device are provided for future growth to support a docking cradle.
TANDBERG FieldView Administrator Guide
Accessories
External Battery Charger. The external battery charger charges and
conditions TANDBERG FieldView Device batteries. Please refer to the
TANDBERG FieldView Device External Charger User Manual for operating
instructions and specifications.
Lens Accessories. The TANDBERG FieldView Device lens provides a standard
30.5 mm threaded connector for the addition of lens filters or other optical
accessories. Use care when adding a lens accessory to avoid stripping the
threads. Do not over tighten.
TANDBERG FieldView Application Installation
The TANDBERG FieldView Application software is meant to be installed on a
workstation (PC) with the following minimum requirements:
Operating System: Microsoft Windows Vista, Windows XP (Service Pack 2 or
later), or Windows 2000 (Service Pack 4 or later)
Processor speed: 1 GHz (1.5 GHz recommended)
Disk space: Up to 120 MB required if Microsoft DirectX, Microsoft .NET
Framework and Visual C++ runtime components are not
already installed
Network:A wired 10/100 Ethernet port is recommended. Some
wireless network adapters may not be optimized for voice
and video operation.
Video card: DirectX v9.0c compatible video graphics card
Audio support: For voice and audio support, the host computer must have
a microphone and speakers and/or headset and/or USB
speakerphone
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First Steps Before Installation
We recommend that the manufacturer’s latest audio, video, and networking drivers
be installed on the host workstation before installing the TANDBERG FieldView
Application software. Refer to the workstation documentation for information on how
to locate and install the necessary drivers.
Installing the TANDBERG FieldView Application Software
Note: Installation of the Enterprise version of the TANDBERG FieldView Application
software using the FieldView Enterprise Suite is similar to the following but utilizes a
customized network or CD-based setup program. Consult the FieldView Enterprise
Suite User Manual for more information.
To install the software:
Sign into the PC as an administrator (either administrator or as a user that is a 1.
member of the administrators group).
If you have previously installed the TANDBERG FieldView Application and it 2.
is currently running, quit the TANDBERG FieldView Application. Also, if the
TANDBERG FieldView Application icon in the Windows Notification Area (next to
the clock) is present, right-click on the icon and select Exit.
Insert the CD into the computer. The installation process should start on its own. If 3.
it does not:
Click the a. Start button on your Windows desktop, and select Run... to open
the Run dialog box.
Type b. D:\FA\setup.exe and click OK to start the installation. Use a drive
letter that matches your CD drive.
Note: always execute setup.exe rather than the .msi file or the installation
may be incomplete.
Follow the installation prompts. The installation puts icons on your desktop for the 4.
TANDBERG FieldView Application and Image Annotator applications and an option
into your Start > All Programs menu.
Depending on what has previously been installed on your computer, first time setup
may prompt you to install a number of utilities, such as the Microsoft .NET Framework
and Microsoft DirectX. Follow the prompts as they appear and re-start the computer
as required.
Coexistence with Security Software
In some cases, resident security programs (e.g. firewall and anti-spyware applications
such as antivirus and worm protection) may block operation or communication
functions of the TANDBERG FieldView Application. This usually results in either an
inability to establish a connection or a warning from the security software asking if the
specified program (the TANDBERG FieldView Application) should be allowed to access
the network or other resources.
In general, you should configure these security applications to allow TANDBERG
FieldView Application communications.
Important: Denying access may prevent proper operation of the TANDBERG
FieldView Application.
Note that some enterprise Virtual Private Network (VPN) clients include a firewall
that may need to be configured to allow TANDBERG FieldView Application
communications.
See Firewall and Anti-Spyware Blocking for a list of specific information relating to
security software configuration.
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Removing the TANDBERG FieldView Application
Software
To remove the software:
Sign into the PC as an administrator (either administrator or as a user that 1.
is a member of the administrators group).
Quit the TANDBERG FieldView Application if it is running. Also, if the 2.
TANDBERG FieldView Application icon in the Windows Notification Area
(next to the clock) is present, right-click on the icon and select Exit.
Select 3. Start > Control Panel > Add or Remove Programs.
From the list of currently installed programs, select the TANDBERG 4.
FieldView Application item and click Change/Remove.
Follow the on screen instructions.5.
Note: The following information will be preserved:
Software license key•
Recordings•
Images•
Infrastructure Installation
Installation instructions for infrastructure equipment such as wireless access
points, network equipment, SIP proxy servers, etc. is beyond the scope of this
document. Please consult the appropriate documentation and vendor support
for the necessary information.
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3. FieldView Network Architecture
Network Overview
The FieldView supports both wired and wireless network operation. Typically,
the TANDBERG FieldView Application will be operated on a workstation that
is connected to a wired network while the TANDBERG FieldView Device will
operate wirelessly; however, any combination of wired and wireless is allowed.
This section provides networking information relevant to the FieldView. In
particular, the section Wireless Networking provides background information
that is important to optimize performance in a wireless environment.
FieldView Network Protocols and Port Usage
Table 3-1 summarizes the network protocols and ports used by the FieldView.
CategoryProtocolPort(s)NotesDetail
SIP
TCP
5
Random
Signaling
SIP
TCPRandom
Signaling
VoiceRTP6004–6200
VideoRTP6000/6001
Subject
RTP6002/6003
Audio
DataRTP
1
Device OS 2.34 (and lower) used random ports. PC Application 2.5.1 (and lower) used random ports.
2
The ports listed in the range 6000-6200 are the first choice when a call is established. If a requested port is in use on the PC,
4
6006
7
Used for calls that do
not use a SIP proxy
server
7
SIP proxy server based
calls
1
Two-way voicePC/Device sends RTP/
2
2
2,6
Status, control, data,
etc.
2,3
PC/Device sends SIP/TCP
pkts out with SRC=x and
DST=5060
PC/Device sends SIP/TCP
pkts out with SRC=x and
DST=5060
UDP pkts out with
SRC=6004-6200 and DST=x
PC/Device sends RTP/
UDP pkts out with
SRC=6000-6001 and DST=x
PC/Device sends RTP/
UDP pkts out with
SRC=6002-6003 and DST=x
PC/Device sends RTP/UDP
pkts out with SRC=6006 and
DST=x
PC/Device receives SIP/TCP
pkts with SRC=5060 and
DST=x
PC/Device receives SIP/TCP
pkts with SRC=5060 and
DST=x
PC/Device receives RTP/
UDP pkts with SRC=x and
DST=6004-6200
PC/Device receives RTP/
UDP pkts with SRC=x and
DST=6000-6001
PC/Device receives RTP/
UDP pkts with SRC=x and
DST=6002-6003
PC/Device receives RTP/
UDP pkts with SRC=x and
DST=6006
the port number will increment (to a limit of 6200) until an available port is located. The Device will not have conflicts and will
use the ports shown.
3
‘x’ is a random port determined during SIP negotiation.
4
Device OS 2.xx used UDP. PC Application 2.x.x used UDP.
5
Optionally configurable as UDP.
6
Device OS 3.76 (and lower) used port 8888. PC Application 3.1.2 (and lower) used port 8888.
7
DST port is 5060, or 5061 if TLS is enabled.
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Wireless Networking
Wireless technology allows the TANDBERG FieldView Device to be used
in places where accessibility would otherwise be difficult. The TANDBERG
FieldView Device has been optimized for reliable, high quality streaming media
within a wireless environment. This allows the TANDBERG FieldView Device to
remain connected in a streaming session while roaming between access points
over a wide coverage area.
Wireless connectivity on the TANDBERG FieldView Device is provided by an
IEEE 802.11b/g Wireless Local Area Network (WLAN) interface. The WLAN
interface is capable of up to 54 Mbps throughput when operated on an 802.11g
network and 11 Mbps when operated on an 802.11b network.
Notes:
This section assumes that the reader is familiar with wireless networking •
fundamentals.
This section provides general information about 802.11 wireless networks •
as used with the FieldView. For specific information (installation,
configuration, etc.) consult your vendor’s documentation.
Wireless configuration and optimization for the workstation (e.g. a laptop •
computer) that is used to host the TANDBERG FieldView Application is
beyond the scope of this document. Consult the appropriate documentation
and support channels for the workstation.
This discussion relates to the operation of the TANDBERG FieldView Device •
in a wireless mode. Similar considerations exist for operation of a wireless
workstation that acts as host for the TANDBERG FieldView Application.
Many of the topics covered in this section are relevant for the workstation
as well as the TANDBERG FieldView Device; however the performance
and characteristics of wireless networking equipment vary widely. For best
results, the workstation should be connected to a wired network connection
whenever practical.
Although using a wired network connection with the workstation is strongly •
recommended, some wireless workstations will function adequately as long
as sufficient signal quality is available and roaming of the workstation is not
required.
Overview
It is beyond the scope of this document to completely cover all aspects of
wireless networking. However, the following sections provide an overview
of some of the key concepts that relate to the use of voice and video over a
wireless network including the following topics:
Radio Frequency (RF) channel selection•
Interference•
Coverage•
Roaming•
Site survey•
Perspective—Is all this really necessary?
The guidelines in the following sections assure the best possible performance
and quality. However, not every organization will have the means or desire to
ensure that all of the recommended steps are taken. In many cases, a less
rigorous approach may allow acceptable performance as long as the limitations
are understood.
A simple setup (such as connecting to existing infrastructure as-is) will
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often work acceptably if 100% coverage in not mandatory, roaming is not
required, and the wireless network is lightly used. Since good signal quality is
a requirement for good performance, ensuring close proximity to the access
point may overcome limitations caused by violations of the guidelines in this
document. As the demand for quality, coverage and availability increase, the
measures discussed in the following sections should be considered.
If the quality is unacceptable, consider using wired connectivity or making
improvements to the wireless infrastructure.
TANDBERG FieldView Administrator Guide
The Importance of Proper Infrastructure
When implementing a wireless network for voice and video, it is important to
understand the capabilities and limitations that are present in this technology.
The demands of video can be supported; however the infrastructure must be
carefully planned and implemented to achieve the desired performance.
Wireless networks are widely used today, and although they may provide
acceptable performance to users running business transactions or surfing
the web, they may not be adequate for streaming real time media. Voice and
video represent a continuous data stream and can exhibit noticeable visual
or audible artifacts with losses or delays in data delivery. Guaranteeing low
loss and delay is difficult given that the basis of WLAN is radio, a medium
inherently susceptible to effects such as dropout, fade, and interference. But
wireless technology has evolved to make it robust and able to support reliable
communications at rates of up to 54 Mbps, with even faster rates under
development.
To realize the full promise of this technology it must be used within the limits
it was designed for, especially if the payload is voice and video. By following
guidelines aimed at improving and optimizing the radio environment, you can
maximize range and performance, and achieve the best possible use of the
wireless infrastructure.
Special Needs for Voice and Video
Real-time media such as video and particularly voice place more stringent
requirements on the network than conventional data transactions such as
copying files, web browsing, downloading files, etc. In the case of a wireless
network, this is particularly important because improper configuration can lead
to unacceptable performance.
Data protocols are typically fault tolerant. Lost data packets can be recovered
by higher level protocols such as TCP/IP that ensure that every packet is
accounted for. Missing packets are resent. Time is not overly critical and so
recovering missing data can occur in the background without the user noticing.
For example, time to download a file may take a few seconds longer than it
would in a case where the network is not suffering from packet loss.
Conversely, voice and video require real-time delivery. For a real-time media
stream, a late packet is the same as a lost packet. Retry can be used to
recover from lost packets but if the time to do so exceeds tens of milliseconds
then the latency in the voice and video becomes unacceptable to the user.
This is especially significant on wireless networks because, unlike most
wired networks where a lost packet is an unusual event, lost packets are
expected. (Studies show that packet error rates of 5 to 15% are common.)
Minimizing error rate is crucial in order to achieve the best possible streaming
performance.
Fig. 3-1 802.11 b/g Channel Separation
(North America).
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Radio Frequency Channel Selection
The 802.11b/g wireless interface operates in the unlicensed 2.4 GHz frequency
spectrum. Up to 14 channels are allocated within this spectrum. The number
of channels varies with the region (e.g. 11 channels in North America, 13
channels in most of Europe, etc.)
Unfortunately, not all of the channels can be used at a single geographic
location because, while each channel consumes over 22 MHz of bandwidth, the
channels are only separated by 5 MHz. This channel overlap is illustrated in Fig.
3-1.
Overlapping channels cause interference resulting in degradation of quality
and throughput. As shown in the diagram, channels must be separated by a
minimum of five channels to ensure interference does not occur. This limits the
maximum number of channels that can be used in close proximity to three.
In North America, the only option for more than two non-overlapping channels
is to choose channels 1, 6, and 11. In other regions of the world, the additional
available channels allow other choices but the three channel limit still exists.
Notes:
Further complicating channel selection is the possibility that a neighboring •
site may use one or more channels that conflict with the channels in use at
a given location.
Existing infrastructure at some sites violate channel overlap rules without •
realizing it. The network may appear to work fine with data but won’t be
sufficient for real-time media. Network monitoring may show:
•
Degraded signal quality resulting in lower transmission rates.
•
Packet errors resulting in frequent 802.11 retries.
•
Data operations tend to occur in bursts which lower the likelihood for
collisions when compared to voice and video which require a continuous
and regular packet stream.
Robust high level protocols such as TCP/IP mask overlap problems •
because lost packets are automatically recovered. Although performance
degradation occurs, it may not be readily apparent for file transfers,
downloads, etc. because the operations will eventually succeed.
Interference
As discussed above, interference from adjacent channels can cause problems
with wireless performance. Unfortunately, there are other sources of
interference within the unlicensed 2.4 GHz RF band utilized for 802.11b/g
WLAN operation. Interference sources include:
Microwave ovens•
2.4 GHz cordless phones•
Bluetooth devices•
802.11 Frequency Hopping devices•
Other 802.11b/g equipment (APs, client devices) on overlapping or •
improperly separated channels
A variety of other 2.4 GHz equipment•
Where possible, interference sources should be minimized. If that is not
possible, other strategies such as channel remapping or relocation may
be considered. A site survey (as discussed in Site Survey) is useful in
understanding and resolving interference issues.
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Wireless Coverage
Range achievable over the 802.11b/g WLAN interface can vary from hundreds
of meters under near ideal conditions down to much shorter distances under
challenging conditions. Coverage area can vary dramatically depending on a
variety of factors, including:
Topography•
•
Walls, dividers, windows, ceilings, floors, etc.
•
Radio-reflective materials (may cause attenuation and/or multi-path
reflections)
Interference and noise•
Access point and antenna mounting location•
Antenna type and orientation•
TANDBERG FieldView Device orientation•
Network traffic•
Number of connected devices•
Effect of Topography on Coverage
Fig. 3-2 shows an aerial view of a simple floor plan with a single access point
(denoted as AP). The dark blue shaded area indicates the coverage pattern
that the access point provides for this site. The building’s walls and dividers act
as attenuators for the signal, shaping the coverage pattern as shown.
Fig. 3-2 Wireless Coverage Map (Aerial
View).
Signal to Noise Ratio
Achievable range is directly related to the quality of the signal received by
the TANDBERG FieldView Device. The quality is a factor of the radio signal
strength, which is affected by attenuators such as the topographic features
listed above and the air itself, and the interference and noise level.
As the noise level approaches the level of the desired received signal, the
quality will suffer. To increase usable range, noise must be kept to a minimum
and signal strength must be used to overcome the remaining noise level (there
is always some level of background noise). The usual measure of signal quality
is Signal-to–Noise Ratio (SNR) which is illustrated in Fig. 3-3 with a simplified
signal.
The TANDBERG FieldView Device provides received signal strength and
SNR information that can be used to assist with range determination and
troubleshoot problems. A more rigorous method of ensuring proper coverage
across a facility is done using a site survey, as discussed in the section Site
Survey.
Other Factors Affecting Coverage
Range further depends on the configuration of the video and audio settings. In
general, higher bit rate settings will lower the range achieved before noticeable
artifacts occur.
In practice, range will vary widely with the factors discussed. The TANDBERG
FieldView Device has been tested and found to work satisfactorily at a distance
of over 200 meters with a 1 Mbps video stream under near-ideal conditions
(outdoors, line of sight, no obstructions, access point mounted at 8 feet, no
nearby 2.4 GHz interference sources). At the other extreme, combinations of
interference and topographic factors can limit range to a fraction of the ideal.
Coverage problems can usually be resolved by assuring proper access point
placement and/or adding additional access points.
Fig. 3-3 Signal to Noise Ratio (SNR).
Fig. 3-4 Wireless Cell Layout.
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Chapter 3
TANDBERG FieldView Administrator Guide
Wireless Coverage of Large Areas
Coverage of large areas requires multiple access points to ensure that all areas
receive an adequate signal. Taking into account the channel selection process
outlined earlier, the access points should be mapped to not interfere with each
other. An illustration of an ideal case of this is shown in Fig. 3-4.
Each cell represents the idealized coverage area of an individual access point.
Signal strength is highest near the center of the cell and fades near the edges.
As mentioned, obstructions and other factors will cause the actual shape
of the cells to vary widely. The key to proper cell layout is to ensure that
adjacent cells use channels that don’t interfere and that enough cell separation
is maintained between cells on the same channels so that interference is
minimized.
Cell radius is measured in signal strength or signal quality rather than distance.
For high quality audio and video streaming, a cell radius of –67 dBm to
–70 dBm is recommended. Same channel cell separation should be 18 to 20 dB.
Ensuring these guidelines are met will allow the TANDBERG FieldView Device
to maintain an audio/video connection while roaming from cell to cell within a
facility.
Notes:
Keep in mind that cells may be organized in three dimensional space due to •
access points on floors above or below.
Consider that access points may be in use in adjacent facilities.•
A site survey (as discussed in the section • Site Survey) is necessary to
ensure optimal cell mapping.
Capacity
Capacity (number of simultaneous calls) depends on many factors, including
infrastructure type, other traffic, stream settings, error rate, etc. Consult your
infrastructure partner for assistance in determining available capacity.
Improving Performance
In addition to the guidelines covered elsewhere, the following items may
improve overall performance and capacity:
A mixed 802.11b/g network requires that a portion of every packet will be •
sent at a slow rate to maintain compatibility with older 802.11b devices.
By switching the network to 802.11g only, overall bandwidth utilization will
become more efficient but at the cost of not allowing 802.11b devices to
share the network.
Many enterprise quality access points provide quality of service features •
that give priority to real time packets such as voice and video. These
features should be enabled when available.
Consider using directional access point antennas for focused coverage of •
long narrow areas.
Performance for simultaneous use of many wireless devices in a small •
area can be optimized by reducing the cell size. This is usually done by
increasing the number of access points in an area while reducing the output
power of each to minimize overlap.
Configure radio equipment to use short preambles since most equipment •
supports its use. Unless very old legacy equipment must be supported,
short preambles can be used to improve bandwidth efficiency.
Roaming performance can be improved on the TANDBERG FieldView Device •
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Chapter 3
by enabling only the RF channels that are in use at the site in the RF
channels configuration screen. The TANDBERG FieldView Device determines
which access points are available for roaming by sampling each channel.
This process takes time and requires the TANDBERG FieldView Device to
stop sending and receiving the media stream. The time lost during this
process can be reduced by scanning only the channels in use at the site.
See the section Network>Radio for information on how to configure this
feature.
TANDBERG FieldView Administrator Guide
Site Survey
Regardless of whether the wireless network at the site is new or existing,
the best assurance that it will be suitable for high-quality voice and video
streaming is to perform a site survey. This involves evaluating the coverage
area of factors such as:
Examining existing WLAN usage•
Signal quality•
Interference and noise•
Channel assignment•
Device location•
Site topography•
The goal is to ensure mobile operation without significant loss of quality over
the desired coverage area mainly by providing:
Adequate bandwidth•
Data transmission reliability•
Low latency/delay time•
It is best to use an experienced WLAN site survey contractor for complex
installations. This is usually available as a service from enterprise WLAN
infrastructure suppliers.
Wireless Security
Wireless networks should be operated with appropriate security measures.
Consult your site administrator for requirements and necessary access key.
See the section Wireless Network Properties for information on configuring the
TANDBERG FieldView Device to support specific security modes.
Wireless Troubleshooting
Please refer to chapter 9. Troubleshooting and your site’s WLAN infrastructure
troubleshooting guide for troubleshooting assistance.
Firewalls and Network Address Translation
Firewalls and Network Address Translation (NAT) can conflict with successful
operation of the FieldView. While in some cases it may be possible to open the
firewall or NAT to directly allow FieldView traffic, this may be cumbersome and
is not recommended due to the security risks.
Instead, use a secure SIP firewall traversal system. Consult TANDBERG for
assistance and recommendations with firewall and Network Address Translation
(NAT) traversal issues.
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Chapter 4
TANDBERG FieldView Administrator Guide
4. TANDBERG FieldView Device
Configuration
Manual Focus
Quick Setup for Basic Wireless Operation
This section provides a quick description of how to initially configure the
TANDBERG FieldView Device for a wireless network. Configuring for wired
Ethernet operation is similar.
Preparation
In preparation, ensure the wireless infrastructure (access points) is operating
and available. Identify the configured channel, SSID, and security parameters.
Follow the instructions in the TANDBERG FieldView Device Quick Start Guide to
install and charge the battery. This may take up to eight hours if fully depleted.
Configuration
To start and login to the TANDBERG FieldView Device:
Press the 1. Power button to turn on the TANDBERG FieldView Device. When
the power is on, the Power indicator LED is green.
Login using the default account (User Name: 2. admin, Password: admin)
or select Skip if Anonymous Login is configured for this device (This is the
default).
Note: This quick setup assumes that the initial default admin user and
password has not been altered. If unable to successfully login to the device,
consult your site administrator for the appropriate login information.
Display Mode
Record
Power
Fig. 4-1 TANDBERG FieldView Device control
buttons.
Power
Fig. 4-2 TANDBERG FieldView Device
indicators.
Network available
Charging
To open the Configuration window:
Repeatedly press the 1. Display Mode button until the Main Menu appears
(see Fig.s 4-1 and 4-3).
If the Status Menu appears (Fig. 4-4) instead of the Main Menu, tap the 2. Back to Main Menu option.
On the Main Menu, tap the 3. Configuration option. The Configuration
window appears.
To configure the radio:
In the Configuration window, use the navigation pane on the left-hand side 1.
of the window to select the Network>Radio page.
Fig. 4-5 Radio Configuration page
Fig. 4-3 Main menu.
Fig. 4-4 Status menu.
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Chapter 4
TANDBERG FieldView Administrator Guide
Verify that the radio is enabled (2. Enable Radio checkbox is selected).
3. Tap Apply.
To configure wireless connectivity:
In the Configuration window, use the navigation pane on the left-hand side 1.
of the window to select the Network>Wireless page (Fig. 4-6). Note that
any changes to this page require a device restart before they take effect.
Note: The IP address shown in Fig. 4-6 is grayed out and is only available to
edit when the Static IP Address option is checked. This does not mean that
the TANDBERG FieldView Device is presently using the IP address shown.
Tap 2. Advanced… in the Wireless configuration area. The CF8385PN1
window appears.
Tap the 3. Wireless Information tab (see Fig. 4-7). After a few seconds the
TANDBERG FieldView Device will display a list of SSIDs for nearby wireless
networks. In this example, the list contains a single network that has an
SSID of 101.
Note: Only access points configured to broadcast their SSID will be displayed.
Connection to networks that do not broadcast their SSID requires a new entry
to be created as described in the section Wireless Network Properties.
Fig. 4-6 Network Configuration tab.
Tap the desired network to highlight it and then tap the 4. Connect button.
If this network has not been configured before, the Wireless Network
Properties window appears (see Fig. 4-8). If the keyboard is in the way,
you can move it by touching the top of the keyboard with the stylus and
dragging it.
Note: If the SSID has (preferred) beside it, it has already been configured.
If the network properties need to be changed, tap the SSID twice (similar
to double-clicking a mouse button) to open the Wireless Network Properties
window.
Enter the wireless network properties to match the settings of your access 5.
point. For more information, see the section Call Control.
Select 6. OK to accept the properties and return back to the CF8385PN1
window. The settings are saved to flash and kept permanently.
In the CF8385PN1 window (Fig. 4-7) watch the status displayed below 7.
the network list. Wait a few seconds for the connection to establish.
If successful, the Network LED (middle LED on top of the TANDBERG
FieldView Device) will be green and the status will display:
Status: Connected
Signal Strength: Good, Very Good, or Excellent
Fig. 4-7 Wireless Information.
Fig. 4-8 Wireless Network Properties.
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Chapter 4
To view the TANDBERG FieldView Device’s IP information:
• Select the IP Information tab (see Fig. 4-9) in the CF8385PN1 window.
Note: You can also view the TANDBERG FieldView Device IP address from the
Status Menu > Network Status.
If your network uses Dynamic Host Configuration Protocol (DHCP), your
TANDBERG FieldView Device will have acquired an IP address from your DHCP
server. Otherwise you can set a static IP address as explained in the following
procedure.
If the TANDBERG FieldView Device did not acquire an IP address, then review
the instructions in this section.
To configure a static IP address:
In the Configuration Window, select the Network page (Fig. 4-6).1.
In the Wireless configuration area, check 2. Static IP Address.
The Static IP Address fields become active. Note that changes to this page
require a device restart before they take effect.
Complete the 3. IP Address, Subnet Mask, Default Gateway, and DNS
Server fields.
Continue to configure the wireless connectivity as explained in the previous 4.
procedure.
Power cycle the device to have your changes take effect.5.
TANDBERG FieldView Administrator Guide
Fig. 4-9 IP Information.
Navigation Pane
Configuration Page
Configuration Options
Configure the TANDBERG FieldView Device using the menus displayed in the
viewfinder. You can configure and monitor parameters such as:
Video settings•
Video source•
Standby timeout•
Viewfinder brightness•
Stylus (touch screen) calibration•
Audio gain/volume, ring tones, audio source•
Radio/Ethernet: DHCP/static, SSID, security, channels•
Time and date•
Version information•
Software updates•
Security options•
SIP configuration: URI, registrar•
The TANDBERG FieldView Device Configuration screens are explained on the
following pages.
Accessing the Configuration Window
To open the Configuration Window:
Repeatedly press the 1. Display Mode button (see Fig. 4-1) until the Main
Menu appears.
If the Status Menu appears (Fig. 4-4) instead of the Main Menu, tap the 2. Back to Main Menu option.
Tap the 3. Configuration option on the Main Menu to display the
Configuration window.
The configuration items are organized into multiple pages. A navigation pane
on the left-hand side of the window can be used to select the desired page.
Fig. 4-10 Navigation pane.
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