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Tele Medical Health Hipaa Dicom HL7 Pacs.Com, Inc. Information Technology Documentation

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Global Media & Communications (1stGMC) will design, install, integrate and administer your network, allowing Modern Graphics to securely share resources and save time throughout the day. Modern Graphics� network will provide:

� Centralized or off-site automatic backup of all your data

� Save Modern Graphics money on hardware by providing access to expensive peripherals from all your workstations

� Streamline your business processes.

Your customized network will allow Modern Graphics to access its data and applications from any computer on the Internet.

Modern Graphics will host its own website, keep tabs on its employees productivity and move large files effortlessly from computer to computer, not to mention the enhanced collaboration tools that allow its team to work together better.

Our Services Include:

Success is achieved through good planning. Our project team looks ahead to anticipate potential problems and then deploys the right resources to avoid errors and delays.

Network services : local area networks

A local area network (LAN) is a group of computers and associated devices that share a common communications line and typically share the resources of a single processor or server within a small geographic area (for example, within an office building).

Usually, the server has applications and data storage that are shared in common by multiple computer users.

A local area network may serve as few as two or three users (for example, in a home network ) or as many as thousands of users (for example, in an fddi network).

The main local area network technologies are:


Ethernet is the most widely-installed local area network (LAN) technology. Specified in a standard, IEEE 802.3, Ethernet was originally developed by Xerox and then developed further by Xerox, DEC, and Intel.

An Ethernet LAN typically uses coaxial cable or special grades of twisted pair wires.

Ethernet is also used in wireless LANs. The most commonly installed Ethernet systems are called 10BASE-T and provide transmission speeds up to 10 Mbps.

Devices are connected to the cable and compete for access using a Carrier Sense Multiple Access with Collision Detection (CSMA/CD) protocol.

Fast Ethernet or 100BASE-T provides transmission speeds up to 100 megabits per second and is typically used for LAN backbone systems, supporting workstations with 10BASE-T cards.

gigabit Ethernet provides an even higher level of backbone support at 1000 megabits per second (1 gigabit or 1 billion bits per second).

10-gigabit Ethernet provides up to 10 billion bits per second

Token ring

A token ring network is a local area network (LAN) in which all computers are connected in a ring or star topology and a binary digit- or token-passing scheme is used in order to prevent the collision of data between two computers that want to send messages at the same time.

The token ring protocol is the second most widely-used protocol on local area networks after Ethernet . The IBM Token Ring protocol led to a standard version, specified as IEEE 802.5. Both protocols are used and are very similar.

The IEEE 802.5 token ring technology provides for data transfer rates of either 4 or 16 megabits per second.

Very briefly, here is how it works:

Empty information frames are continuously circulated on the ring. When a computer has a message to send, it inserts a token in an empty frame (this may consist of simply changing a 0 to a 1 in the token bit part of the frame) and inserts a message and a destination identifier in the frame.

The frame is then examined by each successive workstation. If the workstation sees that it is the destination for the message, it copies the message from the frame and changes the token back to 0.

When the frame gets back to the originator, it sees that the token has been changed to 0 and that the message has been copied and received. It removes the message from the frame.

The frame continues to circulate as an "empty" frame, ready to be taken by a workstation when it has a message to send.

The token scheme can also be used with bus topology LANs. The standard for the token ring protocol is Institute of electrical and electronics engineers (IEEE) 802.5. The Fiber Distributed-Data Interface (FDDI) also uses a token ring protocol .


ARCNET is a widely-installed local area network (LAN) technology that uses a token-bus scheme for managing line sharing among the workstations and other devices connected on the LAN .

The LAN server continuously circulates empty message frames on a bus (a line in which every message goes through every device on the line and a device uses only those with its address).

When a device wants to send a message, it inserts a "token" (this can be as simple as setting a token bit to 1) in an empty frame in which it also inserts the message.

When the destination device or LAN server reads the message, it resets the token to 0 so that the frame can be reused by any other device.

The scheme is very efficient when traffic increases since all devices are afforded the same opportunity to use the shared network . ARCNET can use coaxial cable or fiber optic lines.


FDDI (Fiber Distributed Data Interface) is a set of ANSI and ISO standards for data transmission on fiber optic lines in a local area network (LAN) that can extend in range up to 200 km (124 miles). The FDDI protocol is based on the token ring protocol . In addition to being large geographically, an FDDI local area network can support thousands of users. FDDI is frequently used on the backbone for a wide area network (WAN).

An FDDI network contains two token rings , one for possible backup in case the primary ring fails. The primary ring offers up to 100 Mbps capacity. If the secondary ring is not needed for backup, it can also carry data, extending capacity to 200 Mbps. The single ring can extend the maximum distance; a dual ring can extend 100 km (62 miles).

FDDI is a product of American National Standards Committee X3-T9 and conforms to the Open Systems Interconnection (OSI) model of functional layering.

It can be used to interconnect LAN s using other protocols.

FDDI-II is a version of FDDI that adds the capability to add circuit-switched service to the network so that voice signals can also be handled.

Work is underway to connect FDDI networks to the developing Synchronous Optical Network (SONET).

Typically, a suite of application programs can be kept on the LAN server. Users who need an application frequently can download it once and then run it from their local hard disk.

Users can order printing and other services as needed through applications run on the LAN server. A user can share files with others at the LAN server; read and write access is maintained by a LAN administrator


LAN server may also be used as a Web server if safeguards are taken to secure internal applications and data from outside access.

Network services : wide area networks

wide area network (WAN) is a group of devices located remotely and connected via some electronic means, i.e. telephone system, satellite link, etc.

What this really means is a large group of computers linked together via hardware and software in an unlimited area.

This network may be across town, between cities or between continents. Generally, the network has one or more LANs containing servers for file and print applications, printers for document output and a number of workstations for the end users.

All of these resources are normally physically connected locally via some form of cable (i.e. coaxial, twisted pair, etc.) to a hub and/or router which is then connected to a telephone system, satellite link or other form of electronic transmission.

The key word here is unlimited, when computers are connected locally the network becomes a LAN.

The purpose of a WAN is to allow an organization to share data and hardware throughout all its locations in order to maximize the company's data processing investment.

Ideally, the WAN should improve the following:

� employee productivity / communications

� information management

� reduction/control of costs

� standardization of hardware/ /custom_software\.html\software usage

The WAN should be transparent to the user and manageable by network professionals.


Using the DHCP server, you can significantly simplify configuration of the workstations within your LAN. When using the DHCP server the only setting you have to perform on the client workstations is to set them to get an IP address dynamically from the DHCP server. (This setting comes as the default when adding the TCP/IP protocol in network properties.)

Dynamic Host Configuration Protocol is a protocol for organizing and simplifying the administration of IP configuration for computers in a network. A DHCP server such as WinRoute maintains the settings that are issued to each client within the network that is configured as a DHCP client. These settings define, among other things, where the client must send requests for Domain Name resolution and to whom the client should send all IP traffic that it does not know how to route.


WinRoute MUST ALWAYS run on the computer that is connected to the Internet - through the network card, cable, DSL modem, dial-up link or a router.

WinRoute always acts as the gateway between two (or more) networks where each network is represented by one interface. These interfaces may be Ethernet cards, RAS adapters, USB-to-Ethernet Adapters, PPPoE adapters etc.

Default Gateway

WinRoute acts as a router. As such it requires two basic TCP/IP settings on each computer in your network. Note that the following only applies to clients. The WinRoute host should have a static IP assigned to the private interface.

The Default Gateway on each computer accessing the Internet through the WinRoute computer; must be set to the IP address< of the Ethernet interface of the WinRoute computer that links to the LAN.


Client computer has IP address while WinRoute PC has two interfaces, one linking to the cable modem with an IP from the ISP and another one linking to the private network ( The default gateway for the computer at will be set as

Note 1: When creating IP address space within your local network you must use the IP address from the same subnet. i.e. if the subnet mask you use is then all addresses must be from to

Note 2: You may have more networks connected to the Internet through WinRoute. You may have more Interfaces in the WinRoute computer, one for each network. Then each of these interfaces (their IP address) represents the default gateway for the rest of the network connected to it.


Domain Name System is a naming scheme for IP addressing. For example 1stgmc.net is a domain name and has an associated IP address. A DNS server matches domain names to an IP address. We use the domain name system because it is easier to remember a domain name than a string of numbers.


(Digital (or Data) Service Unit/Channel Service Unit) A pair of communications devices that connect an inhouse line to an external digital circuit (T1, DDS, etc.). It is similar to a modem, but connects a digital circuit rather than an analog one.

The CSU terminates the external line at the customer's premises. It also provides diagnostics and allows for remote testing. If the customer's communications devices are T1 ready and have the proper interface, then the CSU is not required, only the DSU.

The DSU does the actual transmission and receiving of the signal and provides buffering and flow control. The DSU and CSU are often in the same unit. The DSU may also be built into the multiplexor, commonly used to combine digital signals for high-speed lines

Building Cabling

This document describes the standards applicable to a cable system needed to support a Local Area Network (LAN)

�in a building. Included is cost estimation information.


The hardware components, wires and other elements that compose the computer network within your building,

and the software, protocols and data that travel along the wires are jointly called a Local Area Network or LAN.

The creators of a LAN have several things to consider during the design and installation of the LAN. The following

is a list and brief explanation of the standards and cabling components of LANs.


The EIA/TIA (Electronics Industries Association/Telecommunications Industries Association) wiring standards

�provide guidelines for the network wiring of buildings. The standards define a generic telecommunications wiring

plan for buildings that will support many different vendors' products and equipment. It also provides direction

for the design of telecommunications products and specifies a standard of performance for those products.

Adherence to standards will enhance reliability, flexibility and increase efficiency in the use of computers and

telecommunications. Equipment (computers, printers, servers, etc.) can be moved quickly and easily and

re-attached to the network by plugging into a telecommunications outlet in another room. A multitude of

equipment, including voice (telephone, intercom, etc.), video and computers can use the same low-voltage,

< building-wide, standards-based, wire-and-patch panel installation.

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