Coordinating The Connections with
local and national communication carrier company including hardware
recommendation.
Dial-Up WAN Connections
The least expensive and simplest type of WAN connection is
a dial-up modem link using POTS (Plain Old Telephone Service). This uses an ordinary modem
at each end linked to the networks at each end via a bridge or half router. The modem
(Modulator/DE-Modulator) is used to convert the networks digital signals to the analogue
signals used by a telephone line. With current modem technology, the speed is limited to
a practical speed of 33.6KB (56KB? ) of data capacity, and that assumes a good
quality telephone line. Dial-Up connections, while extremely limited on bandwidth,
can be from a cost effective standpoint, ideal for low demand applications like
e-mail.
ISDN WAN Connections
ISDN (integrated services digital network) is a digital
telephone line, that can be used for carrying large amounts of computer data. An ISDN line
is actually 2 lines, or channels, each of 64KB capacity. These lines can be connected
together, or aggregated (known as MLP bonding), to provide 128KB of data capacity. ISDN
Services are delivered in two forms BRI and PRI, with its prime advantage being
scalability and its downside in most areas being cost.
BRI vs. PRI
ISDN Services are comprised of digital channels, ISDN
channels come in two types B channels that carry data (voice, data, fax, etc.) and D
channels which are control channels.
Basic Rate Interface or BRI service is the entry level and
offers two 64 kbps B channels and one 16 kbps D channel (2B+D). The basic service is
intended to meet the needs of most individual users and small offices.
Primary Rate Interface or PRI service is a larger more
scalable form of the BRI service. A PRI offers twenty three 64 kbps B channels and one 64
kbps D channel. PRI is intended for larger organizations with higher data, call, and fax
traffic. Additionally, ISDN is ideal for video conferencing requirements.
56K Leased Line WAN
Connections
Also formally known as DS0 service, and is a digital leased
line service that provides 56 Kilobits of data transfer per second bandwidth. A DS0
connection requires a CSU/DSU (digital modem) and router for each end of the connection.
A 56k connection offers basically twice the bandwidth of a dial-up connection
and is more affordable than T-1 service. Most organizations use 56k service as a
stepping point to higher bandwidth service.
T-1 Leased Line WAN
Connections
Also formally known as DS1 service, and is a digital leased
line service that provides 1.544 Megabits of data transfer per second bandwidth. A DS1
connection requires a CSU/DSU (digital modem) and router for each end of the connection.
A DS1 connection offers basically 30 times the bandwidth of a 56k connection
and is a WAN standard for high demand WAN implementations.
T-3 Leased Line WAN
Connections
Also formally known as DS3 service, and is a digital leased
line service that provides 45 Megabits of data transfer per second bandwidth. A DS3
connection requires specialized equipment for each end of the connection and high
performance routers. DS3 connections are generally cost prohibitive and as such are
used primarily only in very high demand backbone environments.
Frame Relay WAN
connections
Frame relay is used in conjunction with other leased line
services, for example, it is common to see references such as DS0FR and or DS1FR. In short
frame relay is a method of implementing connections over longer distances more cost
effectively. A point to point leased line is connected to a Telco Frame cloud
where packets are delivered to their destination (another point to point leased
line) via a switched network.
Feasibility Evaluation, Design, Installation and set up Wireless
communication.
Wireless communication products are widely
used in vertical markets such as manufacturing, warehousing,
retail, and health care, etc. In these environments,
where workers are mobile and the need for access to updated
and constantly changing information is vital, wireless
LAN technology can lower costs and increase productivity.
Wireless LANs can complement wired LANs in office environments,
where they can support temporary work groups, reduce the
need for network re-wiring, and enable user mobility throughout
a building while maintaining network connectivity. Wireless
LANs can also be used to connect remote area (coverage
up to 30 km).
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