Automatic Gain Control. A way to
normalize the volume level regardless of speaker's position relative
to microphone.");
echo CF_TRow2($row++, "ANS", "Automatic Noise Suppression. Reduces
background noise from audio signal.");
echo CF_TRow2($row++, "Analog", "Analog refers to information represented
by a continuously varying value.");
echo CF_TRow2($row++, "Application Contact, Video", "A person that is either a room contact or a scheduling contact for video site.");
echo CF_TRow2($row++, "Bandwidth", "A measure of the information-carrying
capacity of a communications channel; the speed at which data can be
transferred. Normally measured in bits per second or bytes per
second.");
echo CF_TRow2($row++, "Baud", "Symbols per second. If the symbols
carry one bit of information each, this value is then also the speed
of transmission in bits per second (bps). Informally, this term is
often used interchangably with bits per second.");
echo CF_TRow2($row++, "Billing Contact", "A person that is responsible for the
contractual and financial aspects of a site. See also the role
information.");
echo CF_TRow2($row++, "Binary", "A numbering system having only two digits,
typically, 0 and 1.");
echo CF_TRow2($row++, "Bonding", "Method for making several
communication lines look like one, higher-rate line.");
echo CF_TRow2($row++, "bps", "Bits per second. "kbps" is a
unit representing one thousand bits per second. "Mbps" is a
unit representing one millsion bits per second. "Gbps" is a
unit representing one billion bits per second.");
echo CF_TRow2($row++, "BRI", "ISDN Basic-Rate Interface consisting
of 2B+D channels. Nominal speed of the entire line is 144 kbps.");
echo CF_TRow2($row++, "BRI Network", "ISDN Interface to a modem or similar
device.", "");
echo CF_TRow2($row++, "Bridge", "Obsolete. An old name for a Multipoint Control Unit (MCU) that can link
multiple video conferencing systems for multipoint calls.");
echo CF_TRow2($row++, "Broadband Communications", "Term characterizing
both digital and analog transmission systems. Broadband
communications is generally understood to indicate either a fast
data-rate digital system (at least 1 Mbps) or a wide bandwidth analog
system. There is no accepted uniform defition of the speed at which a
system is considered "broadband."");
echo CF_TRow2($row++, "Call Detail Records", "(CDR) Records created by the system and the
gatekeepers that contain information about calls.");
echo CF_TRow2($row++, "Call Rate", "The
bandwidth used for a voice or video call. The rate includes the audio
portion, the video portion (if any), and the control traffic that must
be real time. Typical call rates are 80kpbs for a voice call, and
384kbps and 768kbps for video calls.");
echo CF_TRow2($row++, "Camera Presets", "Presets are stored camera position
settings that can be called up quickly.");
echo CF_TRow2($row++, "Centrex", "A specific
form of classic telephone service
offered by MN.IT Services using commercial carrier facilities.");
echo CF_TRow2($row++, "CIF", "Common Intermediate
Format for video. The image size is 352 x 288 pixels and it is at
a rate of 30 frames per second. It is an optional format in the H.261
and H.263 optional standards.");
echo CF_TRow2($row++, "Circuit", "In general, the physical connection (or
path) of channels, conductors and equipment between two given points
through which data may be transferred. More specifically, such a path
provided by a service provider.");
echo CF_TRow2($row++, "Classic", "MN.IT
Services' term for any circuit-based telephone service, as opposed to
VoIP. Centrex and ISDN are both considered forms of classic
service.");
echo CF_TRow2($row++, "CLI Gallery", "The brand name of the equipment used
in some of the 225/235MNet interactive video network sites. The
gallery houses the main camera, speakers, codec, VCR, and other
equipment.");
echo CF_TRow2($row++, "Coaxial Cable", "A type of cable used for broadband
data and cable systems where one conductor is completely surrounded by
the other. These cables are very resistant to electrical noise. Also
know as "coax."");
echo CF_TRow2($row++, "Codec", "Coder-decoder. A device that converts the
analog video and audio signals to digital and compresses them for
transmission. It simultaneously decodes incoming signals, converting
them back to analog for viewing and listening. Used in the past; the
preferred term is now system.");
echo CF_TRow2($row++, "Common Carrier", "A telecommunications organization
that offers communications services to the general public via shared
circuits at published tariff rates. In the United States, the Federal
Communications Commission and various state public utility commissions
regulate common carriers.");
echo CF_TRow2($row++, "Compressed Video", "All video is compressed, in
the sense that only a subset of what the camera's lens sees is
recorded. When video is carried so that there are no visible picture
or motion artifacts, it is referred to as "broadcast" or
"full motion" video. As of 2007, compression technology is
at a point that 640 x 480, 30 frame/second video (with full audio) can
be carried at broadcast quality in about 2Mbps of bandwidth (using the
best-avaialble encoders). By 2012, full HD video of 1920 x 1080 x 30
frame/second video (with full audio) can now be carried in that same
2Mbps. Consequently, video transmitted in less bandwidth will show
picture or motion artifacts and hence "look compressed."");
echo CF_TRow2($row++, "Compression", "The method of taking raw data and
processing it so that it may be represented with less information (or
bits in the digital world). Compression falls into two categories:
lossless, where the original data may be completely recovered
and lossy, where the representation of the original data
contains errors. In the latter case, the errors are not necessarily
audible or visible to the viewer.");
echo CF_TRow2($row++, "Conference", "See event.");
echo CF_TRow2($row++, "Conference Chairperson", "The individual at the host
site facilitating the meeting.");
echo CF_TRow2($row++, "Continuous Presence", "The ability to see more than
one far-end site at a time in a multipoint call.");
echo CF_TRow2($row++, "Control Panel", "See Touch Screen Control Panel.");
echo CF_TRow2($row++, "CSN", "Circuit Switched Network (for example ISDN or POTS).");
echo CF_TRow2($row++, "Database", "Information or files stored in a
computer for subsequent retrieval and use.");
echo CF_TRow2($row++, "Default Gateway", "The address of the interface
that is the "next hop" on the way to the Internet. The
default gatway is typically on a router or firewall. Typically, a
computer is connected to a device called a switch or a hub. Several computers connect
to the switch. Devices connected to the same switch do not need a
router to find each other. However, if the PC or other device you need
to connect to is not local to your switch, the default gateway finds
it. If there a valid path, the connection is made. Note that some
switches can be divided up into more than one virtual switches to
allow grouping of devices like IP phones on some ports and PCs on
others. The default gateway for the IP phones would be different from
the one the PCs see, so a router would be needed for a PC to find a
phone. Even though the IP-phones and PCs are connected to the same
physical switch, software can logically keep them separated.");
echo CF_TRow2($row++, "Device", "The term
device or is used to refer to any type of network device
(router, switch, etc.). The term network device is used
in places where the network context can't be inferred from context; it
means the same thing as device.");
echo CF_TRow2($row++, "Digital", "Representing information as a series of
discrete values. Small errors in these values can be corrected by
restoring the value to the nearest discrete value. Digital signals
can thus carry information more reliably than analog signals.");
echo CF_TRow2($row++, "Direct Broadcast Satellite (DBS)", "A satellite
system designed with sufficient power so that inexpensive earth
stations can be used to receive signals.");
echo CF_TRow2($row++, "Document Stand/Graphics Camera", "The mounted camera
system used to transmit graphics.");
echo CF_TRow2($row++, "DS", "The DS series is a hierarchy of
standard digital serial communications links. Four speeds are
defined: DS-0, DS-1, DS-2, and DS-3. The standard has separate
provisions for US and European systems: this glossary will only cover
the US systems.");
echo CF_TRow2($row++, "DS-0", "A DS-0 transmits at 56 000 bit per
second. It is the standard version of a "56K" line. It can
carry one voice channel at 8000 samples per second of 7 bits each.");
echo CF_TRow2($row++, "DS-1", "A DS-1
contains 24 DS-0 lines plus additional signalling data. Nominal
bandwidth is 1 544 000 bits per second. It is often referred to as a
T-1.");
echo CF_TRow2($row++, "DS-2", "A DS-2 contains 4 DS-1 lines (or 96
DS-0 lines) plus additional signalling data. For all practical
purposes, these are not used in the US.");
echo CF_TRow2($row++, "DS-3", "A DS-3 contains 28 DS-1 lines plus
additional signalling data. Nominal bandwidth is 43 232 000 bits per
second.");
echo CF_TRow2($row++, "DSCP", "(also knowns as
Differentiated Services Code Point or Diffserv). A method of marking
IP packets to indicate the desired quality-of-service level for those packets.");
echo CF_TRow2($row++, "DSL", "Digital Subscriber Line. A service
that enables the use of regular analog telephone lines to carry data.
Speeds range from 128 kbps to many megabits. Specific speeds vary
depending on line quality and distance.");
echo CF_TRow2($row++, "E-Rate", "Federal government program that makes
grants to elementary and secondary schools covering discounts on
carrier services, including not only Internet access but also a raft
of other offerings.");
echo CF_TRow2($row++, "E.164 identifier", "ITU-T
recommendation for international telecommunication numbering,
especially ISBN, B-ISDN (Broadband ISDN), and SMDS. E.164 identifiers
look similar to telephone numbers and in fact are drawn from the same
numbering plan. Sometimes also called "E.164 numbers."");
echo CF_TRow2($row++, "Encoder", "The special
case of a system where the device a
laptop or or desktop computer equipped with special hardware to
interface with a camera and microphone(s). A web camera is sufficient,
but a true NTSC camera works better. There are also turnkey systems
available from a few manufacturers which offer quicker setup and
technical support.");
echo CF_TRow2($row++, "End Point", "Obsolete term; the preferred term is
now system.");
echo CF_TRow2($row++, "Event", "A video call with two
or more sites participating.");
echo CF_TRow2($row++, "FCIF", "Full-CIF. Another name for CIF");
echo CF_TRow2($row++, "FECC", "Far-End Camera Control");
echo CF_TRow2($row++, "Fiber Optic Cable", "A cable containing one or more
optical fibers.");
echo CF_TRow2($row++, "Focus", "A camera control. Focus is used to improve
the clarity of the transmitted image.");
echo CF_TRow2($row++, "Frame", "One complete video picture. A frame may be
comprised of two fields (interlaced video) or may be whole
(progressive or non-interlaced video).");
echo CF_TRow2($row++, "Freeze-Frame Graphics", "Snapshots with double
resolution quality.");
echo CF_TRow2($row++, "Full-Duplex Audio", "Two-way audio may be captured
and reproduced simultaneously (i.e., you can both listen and
speak). With full-duplex audio, the microphone may capture local
audio for transmission while the far end audio may be heard
clearly. Interruptions and double-talk are possible.");
echo CF_TRow2($row++, "G.711/722/728", "The industry standards for
audio (711 & 722) - and PictureTel's 728 audio enhancements for
clarity.");
echo CF_TRow2($row++, "Gatekeeper", "A
gatekeeper is a device for binding E.164 addresses to IP addresses and
for managing the bandwidth and call control for systems. The gatekeeper
page has information on the MN.IT Services gatekeepers. Its functions
include: translating E.164 identifiers
telephone-like numbers to IP addresses, admission control (controls
who can place calls), limiting transmission rates globally or by
location, creating call detail records,
putting a video call on hold (some cases), transfer of video calls
(some cases). MN.IT Services' gatekeepers perform the first four
functions above. MN.IT Services uses them mainly for admission control
and to allow video users to dial a phone number instead of an IP
address.");
echo CF_TRow2($row++, "Gateway", "A
gateway is a device that converts one set of protocols,
addresses, or ways of moving data to a different set. Routers used to be called gateways, but
they normally don't do conversion and so the term is obsolete when
referring to routers. Firewalls or network devices that do NAT can be considered to be gatways. For
video, a gateway enables connections between different network or
session types. For example, an IP video system connected to the
conferencing with an ISDN system connected to the PSTN (Public
Switched Telephone Network). MN.IT Services has several gateways in its video
network.");
echo CF_TRow2($row++, "Geostationary Satellite", "A communications
satellite, with a circular orbit 22,400 miles in space. The satellite
is stationary in the sky when viewed from earth.");
echo CF_TRow2($row++, "GigE", "Gigabit Ethernet.");
echo CF_TRow2($row++, "GMT", "Greenwich Mean Time: the
baseline for determining the time of day and time zones.");
echo CF_TRow2($row++, "Graphics", "Charts, graphs, notes, pictures or flat
art that may be transmitted across the network.");
echo CF_TRow2($row++, "Graphics Camera", "A table-top camera (usually
with attached illumination) for showing printed material or three
dimensional objects. This camera's output would normally be connected
as a live-motion source while in use. The output of this device is
standard NTSC (525 Vertical lines of which 486 are visible) video. A
PC's output can also be a graphics source at NTSC resolutions but
detail can be lost. When a PC is scan-converted to NTSC, use a minimum
font size of 18-point or larger.");
echo CF_TRow2($row++, "H.320", "An ITU-T umbrella
specification covering a method to encode and transmit a video signal
over telephone circuits (PSTN, ISDN, T-1). H.320 is still heavily
used in some parts of the world.");
echo CF_TRow2($row++, "H.323", "An ITU-T umbrella
specification covering a method to encode and transmit a video signal
over IP networks. It is part of a family of standards. The standard
is at http://www.itu.int/rec/T-REC-H.Imp323-200911-I/en.");
echo CF_TRow2($row++, "H.264", "An ITU-T umbrella
specification covering a method to encode and transmit a video signal.
It is part of a family of standards. This is the modern video
standard used on the web in general; by Apple iPhone, iPad and similar
devices; and other tablets and smartphones.");
echo CF_TRow2($row++, "High Definition", "In theory,
better than standard definition. In practice, a marketing term that
means very little. For broadcast video, the ATSC defines it to mean a
16:9 image at or greater than 720 lines progressive or 1080 lines
interlaced.");
echo CF_TRow2($row++, "Host Site, Video", "The site from which a meeting
originates.");
echo CF_TRow2($row++, "Host Site Coordinator, Video", "A person who determines the purpose,
content, and overall structure of a video conference.");
echo CF_TRow2($row++, "Hz", "Hertz, a measure of cycles per
second.");
echo CF_TRow2($row++, "IDEC", "Integrated Dynamic Echo Canceller
patented by PictureTel. Dynamically eliminates conference echo so
that true full-duplex audio is possible.");
echo CF_TRow2($row++, "Interactive Media", "This term refers to new
telecommunications systems designed to permit two-way communications
between televisions or computers in one location with software stored
on a central computer. Can also allow individuals in distant
locations to communicate, teach or learn from one another.");
echo CF_TRow2($row++, "IMUX", "Inverse Multiplexer. Device that
bonds two or more BRI lines to form a higher rate channel.");
echo CF_TRow2($row++, "ISDN", "Integrated
Services Digital Network. A public switched network providing
digital connections for the concurrent transmission of voice, video,
data, and images. Often seen as a technological bridge between the
old, analog telephone system and an upgraded, broadband network. ISDN
service can be delivered as PRI (Primary Rate Interface) on a T1 line
or as a BRI (Basic Rate Interface) over standard twisted-pair wire
phone lines. PRI has 23 usable 64kbps channels and BRI has 2
channels. Both types also have a smaller channel used for call
signaling. ISDN PRI can also be referred to as 23B+D (23 channels
which are the bearer channels and 1 is the Data [signaling]
channel. It enables dial-up H.320 delivery of data and can also carry
voice. Videoconference systems can often accommodate 4 to 6 BRI
connections for calls up 768kbps (6-lines X 2-channels per/line) *
64kbps/channel. Video bridges, like MN.IT Services', can accommodate 1
or more PRI lines.");
echo CF_TRow2($row++, "kbps", "Kilobits per second. Unit representing
one thousand bits per second. The 'k' should always be lowercase. ");
echo CF_TRow2($row++, "LAN", "Local Area
Network. A network that extends over a small area. Typically,
the portion of a network that remains within a room, floor, or
building is considerd the LAN portion. Contrast with WAN.");
echo CF_TRow2($row++, "Mbps", "Megabits per second. Unit representing
one million bits per second. The 'M' should always be in upper case:
usage of 'mbps' would be one thousandth of a bit per second!");
echo CF_TRow2($row++, "MCU", "Multipoint
Control Unit: a device that can link several video conferencing
systems into a single conference. The MN.IT Services MCUs can connect
IP systems on MNET or anywhere, provided they meet certain criteria
and have a routable IP address. MN.IT Services MCUs can also add
telephone participants, IP webcams (best effort) and ISDN-connected
video systems, as well as Switched 56K connected systems.");
echo CF_TRow2($row++, "Modem", "Modulator-demodulator. Converts digital
signals to and from analog.");
echo CF_TRow2($row++, "Multipoint Conferencing", "Multipoint conferencing
occurs when more than two sites are on-line, connected simultaneously.
Every site has the ability to view the others, although not
simultaneously.");
echo CF_TRow2($row++, "NAT", "Network Address
Translation. NAT is used where addresses on one side of a network
device need to be different on the other side. Sites that use RFC
1918 private addresses often use
NAT.");
echo CF_TRow2($row++, "Network", "The connections over which computers or
other devices are connected with one another, such as over a telephone
network.");
echo CF_TRow2($row++, "Network Administrator", "The person or organization that provides the
communications between MN.IT Services and the person or organization that
actually manages a customer data network (except in large
organizations, they are often the same people). Duties typically
include assigning addresses, configuring equipment, managing cabling,
and configuring security policies.");
echo CF_TRow2($row++, "Network Device", "The term network device or is used
to refer to any type of network device (router, switch, etc.).
The term device is used in places where the network context can
be assumed.");
echo CF_TRow2($row++, "NT1", "Network termination equipment for ISDN BRI.
Turns a U interface into an S/T interface. Not needed when connecting
to most digital PBXs.");
echo CF_TRow2($row++, "NTSC", "National
Television Standards Committee. A standard for broadcast
television in US and Japan. Theoretical resolution of 720x480, 30
interlaced frames per second.");
echo CF_TRow2($row++, "Open-Network", "An industry wide standard that
allows different telecommunications vendors to interconnect with a
network.");
echo CF_TRow2($row++, "PAL", "Phase Alternating Line. European
television format. ", "720x576, 25 interlaced frames per second.");
echo CF_TRow2($row++, "Pan", "A camera move. To pan is move the camera
side-to-side in a sweeping motion.");
echo CF_TRow2($row++, "Participant Site, Video", "The site(s) from which the meeting
does not originate, but contains active participants.");
echo CF_TRow2($row++, "PIP", "Picture-In-Picture. A second smaller
window inside the main screen.");
echo CF_TRow2($row++, "Point-to-Point Conference", "A conference occurring
between two points (locations) on the network.");
echo CF_TRow2($row++, "Port", "The physical interface between a device and
a circuit.");
echo CF_TRow2($row++, "POTS", "Plain Old Telephone
Service.");
echo CF_TRow2($row++, "Power Cam 100", "High end optics and zoom camera");
echo CF_TRow2($row++, "Power Mic", "360 degree pick-up microphone for
flexibility in meeting attendees' seating placement in room.");
echo CF_TRow2($row++, "PRI", "ISDN Primary Rate Interface. 23x64
kbps (T1 in the US, Japan, and similar countries), 30x64 kbps (E1 in
Europe, China, and other countries).");
echo CF_TRow2($row++, "Private Addresses", "Private addresses are a set of addresses
that are guaranteed to not be routed across the Internet. They
consist of the blocks: 10.0.0.0/8
100.64.0.0/10
172.16.0.0/12
192.168.0.0/16
They can be routed
within an organization and MN.IT Services uses private addresses
extensively. The MNET Private
and Non-Routed Address Space Policy document covers their use.");
echo CF_TRow2($row++, "PT724", "A proprietary audio for PictureTel giving
7khz of audio while only using 24 kbs of the ISDN phone line.");
echo CF_TRow2($row++, "PTZ", "Pan-Tilt-Zoom. Camera functionality.");
echo CF_TRow2($row++, "Public Switched Telephone Network", "(or PSTN) The telephone system.");
echo CF_TRow2($row++, "QCIF", "Quarter-CIF picture resolution.
176x144 pixels. H.261 and H.263 mandatory format.");
echo CF_TRow2($row++, "QoS", "Quality-of-Service. Quality-of-service is the
ability for a network provider to identify different types of traffic
and handle them according to those types. It enables a network
provider to ensure that, for example, voice traffic can be delivered
with the required inter-packet timings.");
echo CF_TRow2($row++, "RFC", "Request For
Comments. RFCs are the main Internet design documents. They
specify network protocols, document "best practices," and
establish standards. They are available from the RFC Eitor at http://www.rfc-editor.org.");
echo CF_TRow2($row++, "RFC 1918", "This is
the specific document that governs private addressing. See the private entry.");
echo CF_TRow2($row++, "Role", "A role is a
way in which a person or organization interacts with MN.IT Services regarding a
service. The video section on this site has a clearly laid out set of
roles.");
echo CF_TRow2($row++, "Room Contact, Video", "A person that is responsible for operational
support, and management of a video site. See also the role
information.");
echo CF_TRow2($row++, "Router", "A
router is a network
device that performs layer 3 (the IP layer) packet routing.
Many devices can perform both routing and switching functions, which
is why we use the term network device or simply
device.");
echo CF_TRow2($row++, "RSVP", "The Resource Reservation Protocol (RSVP) is
an IETF standard designed to support resource (for example, bandwidth)
reservations through networks of varying topologies and media.");
echo CF_TRow2($row++, "Scheduling Contact, Video", "A person that is responsible for
scheduling a video site. See also the role
information.");
echo CF_TRow2($row++, "Scheduling System, Video", "MN.IT Services uses the Tanberg Management System (TMS) for
scheduling video conferences. MN.IT Services strongly recommends using TMS for
all conferences. Note that conferences scheduled using TMS have
priority over ad hoc conferences.");
echo CF_TRow2($row++, "Site", "A site is the room that
can participare in video conferencing. If the system serving the room
is not located in the same room as the participants, the site name -
which is also the name assigned to the system - uses the number of the
room the participants are in. Contrast with the term system, which refers to the equipment.");
echo CF_TRow2($row++, "Subnet", "A subnet collection of systems off a
particular customer control point interface. All systems in a subnet
share the same network block.");
echo CF_TRow2($row++, "Subzone", "A subzone is collection of subnets within
a zone grouped for bandwidth management purposes.");
echo CF_TRow2($row++, "Switch", "A
switch is a network
device that performs layer 2 (the Ethernet or MAC layer)
packet switching. Many devices can perform both routing and switching
functions, which is why we use the term network device or
simply device.");
echo CF_TRow2($row++, "Switched 56", "AT & T network providing
connections at multiples of 56 kbps.");
echo CF_TRow2($row++, "Switched Video", "A residential and business video
service in which customers can dial up others (much like today's
telephone service) and through which customers can order
video-on-demand and other video-based services. Sometimes called video
dial tone.");
echo CF_TRow2($row++, "System", "The unit at
the site that encodes and decodes the audio/video signal, as well as
performing call control functions. Codec and end point are other, now
obsolete, terms with the same meaning: system is the preferred term.
Compare with site, which refers to the
room the system is in. See also encoder.");
echo CF_TRow2($row++, "T-1", "A T-1 is the
old term for a DS-1 lines. Nominal
bandwidth is 1 544 000 bits per second.");
echo CF_TRow2($row++, "T.120", "Standard for data conferencing and
conference control for interactive multimedia communication both
multipoint and point-to-point.");
echo CF_TRow2($row++, "Technical Contact", "A person responsible for the technical
implementation and support of a video site. See also the role
information.");
echo CF_TRow2($row++, "Teleconferencing", "The simultaneous visual and/or
sound interconnection that allows individuals in two or more locations
to see and talk to one another in a long-distance conference
arrangement.");
echo CF_TRow2($row++, "Tilt", "A camera movement. To tilt is to move the
camera up and down in an arc without changing the camera's physical
height from the floor.");
echo CF_TRow2($row++, "Touch Screen Control Panel", "The panel that controls cameras, audio, video
switching, source selection and transmission during a meeting.");
echo CF_TRow2($row++, "VCS", "Video Conferencing System. Another term for
a video system.");
echo CF_TRow2($row++, "Video Conference", "See event.");
echo CF_TRow2($row++, "Voice-Activated", "If three or more sites are in a
conference call, voice activation causes the conference to show the
person who is currently talking.");
echo CF_TRow2($row++, "Voice Administrator", "The person or organization that provides the
communications between MN.IT Services and the person or organization that
actually manages a customer voice needs (except in large
organizations, they are often the same people). Duties typically
include telephones moves/adds/changes, arranging for audio
conferences, ordering language line services, and similar actions.");
echo CF_TRow2($row++, "VoIP", "Voice over IP.
The provisioning of voice services using packet-based service,
specifically TCP/IP.");
echo CF_TRow2($row++, "VPN", "Virtual Private
Newtorks. A VPN is a completely isolated IP network with its own
routing table. Routers can carry multiple VPNs and traffic in each
VPN is completely isolated from all that in all other VPNs. IP
addresses (such as those in the 10.0.0.0 network) can be safely reused
from one VPN to another.");
echo CF_TRow2($row++, "WAN", "Wide Area
Network. A network that extends over a large area. Typically,
the portion of a network that connects buildings, crosses public
rights-of-way, or involves service providers is the WAN portion.
Contrast with LAN.");
echo CF_TRow2($row++, "Wireless Infrared Keypad", "Control system that
enables meeting flexibility by not tethering the control panel to a
particular place.");
echo CF_TRow2($row++, "Zone", " A zone is a collection of sites
registered to a single gatekeeper.");
echo CF_TRow2($row++, "Zoom", "A camera control. It means to change
the size of the image optically without actually changing the distance
between the subject and the camera.");
?>
Network Hub Sites
MN.IT Services' network has three types of sites: customer,
aggregation, and hub.
A Customer Site serves customers at one location. It has
these characteristics:
| Environment | Normal office. |
| Physical | Customer provides physical security. |
| Access | Either business day or 24x7 per customer
requirements. |
| Power | Regular 20A/110V line power. UPS or similar are
optional. |
| Telephone | CJDN sites have MN.IT Services-provided analog phone line.
For other sites, a customer-provided analog phone line that accepts
incoming calls is desired. |
| Connectivity | Customer purchased. |
An Aggregation Site serves customers from multiple location.
It has these characteristics:
| Environment | Climate controlled including A/C and humidity
control. |
| Physical | Customer provides physical security. |
| Access | 24x7 |
| Power | Regular 20A/110V line power. Number of circuits is
engineered per site. UPS is required. |
| Telephone | MN.IT Services-provided analog phone line connected to
MN.IT Services device at all times. |
| Connectivity | Single, specified by MN.IT Services. |
A Hub Site provides area redundancy and serves customers
from multiple location. It has these characteristics:
| Environment | Climate controlled including A/C and humidity
control. |
| Physical | Site coordinator provides physical security. |
| Access | 24x7 |
| Power | Regular 20A/110V line power. Number of circuits and
other power requirements are engineered per site. UPS and generator
with 72 hour capacity are required. |
| Telephone | MN.IT Services-provided analog phone line connected to
MN.IT Services device at all times. |
| Connectivity | Dual or greater, specified by MN.IT Services. |