Wireless Point to Point RF Link

WirelessPoint to Point bridges allow you to bridge Ethernet LANs between office buildings, factories, warehouses, and remote locations with minimal capital investment and no monthly leased-line costs. 

Wireless Point to Point Point to Point links are an excellent way to make high data transfer speeds between two nodes. This is an ideal way how to connect two offices. Also these types of wireless links are very useful if you need to create backbone link from some distant radio access point to your main Internet source. For creating such connections we recommend to use 5 GHz wireless bridges (as 2.4 GHz frequency is no more reliable due to interferences of other widely used devices). In case of NLOS (Non Line of Sight) we strongly recommend to use 900MHz devices.

Wireless Point to Multi Point RF link

Point to Multipoint connections are the most usual way how wireless ISPs (WISPs) connect their customers. They put access point somewhere high in the tower above the city or on some high building and then point their client antennas to this access point. Nowadays it is better to use 5GHz (802.11a) instead of 2.4GHz. There is much more channels to choose from in 802.11a.

Wireless WDS Connectivity

WDS (Wireless Distribution System) is the best way how to interconnect many access points and allow users to move around without getting disconnected from network.
Using this system you can cover large areas and allow users to move for large distances while still being on-line.
This system allows packets to pass from one wireless AP (Access Point) to another, just as if the APs were ports on a wired Ethernet switch.
APs must use the same standard (802.11a, 802.11b or 802.11g) and work on the same frequencies in order to connect to each other. 

Wireless MESH Network

A wireless mesh network is a communications network made up of radio nodes in which there are at least two pathways of communication to each node. The coverage area of the radio nodes working as a single network becomes a mesh cloud. Access to this mesh cloud is dependent on the radio nodes working in harmony with each other to create a radio network. A mesh network is reliable and offers redundancy. When one node can no longer operate, all the rest can still communicate with each other, directly or through one or more intermediate nodes. Omnidirectional antennas are used in order to cover larger areas. Widely used by security companies in order to install surveillance cameras.

Voice over RF Link

●SIP / H.323 protocol

●WAN &  Lan port for broadband sharing

●Voice channels status display, easy to manage. 

●Web-Based Graphical UI Configuration, easy to configure. 

A VoIP Gateway (Voice over IP Gateway) is a network device that helps to convert voice and fax calls between an IP network and Public Switched Telephone Network (PSTN).in real time. It is a high performance gateway designed for Voice over IP applications. DIGIANA's 4 & 16  series gateways provide  FXS / FXO connect the analog phone, PABX trunk/extension card or PSTN line, support  voice channels.

Point To Point Overview

Point to Point wireless solutions are the most simple of the three wireless solutions to configure and install. This is a simple wireless solution that connects two points, one to the other. Point to Point wireless solutions carry high bandwidth and can travel long distances. They are the perfect solution for replacing costly T-1 Lines or to serve as a back up for T-1 lines.

Glossary of Terms

802.11

The standard that defines the technology used for wireless LAN products. The original standard was ratified by the IEEE in 1997, and specified products with a maximum data rate of 2 Mbps. Since then, the standard has expanded to define faster wireless systems.

802.11a

The IEEE standard for wireless LAN products that specifies data rates up to 54 Mbps in the 5 GHz band. 802.11a products are not compatible with those based on 802.11b or 802.11g and their range is approximately half that of 802.11b/g products.

802.11b

The IEEE standard for wireless LAN products that specifies data rates up to 11 Mbps in the 2.4 GHz band. 802.11b was the first widely-accepted Wi-Fi technology, but has now been replaced by the faster 802.11g standard.

802.11e

An IEEE standard that adds Quality of Service (QoS) features and multimedia support to the existing 802.11b, 802.11g, and 802.11a wireless networks.

802.11g

The IEEE standard for wireless LAN products that specifies data rates up to 54 Mbps in the 2.4 GHz band. 802.11g is now the mainstream technology for wireless networks in the home, office and public places.

802.11i

The IEEE standard specifying security mechanisms for 802.11 networks. 802.11i makes use of the Advanced Encryption Standard (AES), and includes improvements in key management, user authentication through 802.1X and data integrity of headers.

802.11n

The forthcoming IEEE standard for wireless LAN products that may specify data rates up to 500 Mbps, and throughput between 100 and 200 Mbps. The 802.11n standard will utilize MIMO technology along with other techniques to improve efficiency, and is expected to be finalized in 2006.)

Advanced Encryption Standard (AES)

The preferred standard for the encryption of commercial and government data using a symmetric block data encryption technique. It is specified in the 802.11i security standard and used in the implementation of WPA2.

Access Point (AP)

Wi-Fi enabled computers typically connect to wired networks by means of an access point, a wireless device whose primary function is to consolidate multiple wireless connections, serving as an intermediary between wireless devices and high-speed wired networks. Access points are connected to a wired network with an Ethernet cable.

Ad-Hoc

An old term used to describe a device-to-device network in which devices communicate between one another without going through a router or access point (also known as a peer-to-peer network).

Authentication

The process to verify the identity of a wireless client or end user and allow it access to the network.

Bandwidth

The maximum transmission capacity of a communications channel at any time (usually measured in bits per second). If you compare the communications channel to a pipe, bandwidth represents the pipe width and determines how much data can flow through the pipe at any one time.

Bridge

A wireless device that connects multiple networks together.

Broadband Modem

Broadband modems act as gateways for high speed network access in the home and small business, facilitating a broadband connection through cable or DSL connection. Some broadband modems are beginning to incorporate Wi-Fi capabilities, replacing the need for an access point or router.

Client

Any computer connected to a network that requests files and services from the server or other devices on the network. The term also refers to end users in a network.

Data Rate

Pre-determined rates set in the 802.11 standard that provide for systematic speed decreases to maintain a connection as the client moves farther away from the access point. The OFDM data rates include: 54, 48, 36, 24, 18, 12, 11, 9, 6, 5.5, 2 and 1. This is not the actual speed at which data is sent (called throughput), because of built-in redundancy, error correction, and protocol overhead.

Dual-Band

A device that is capable of operating in two frequencies. On a wireless network, dual-band devices are capable of operating in both the 2.4 GHz (802.11b/g) and 5 GHz (802.11a) bands. In cellular phone technology, dual-band devices typically operate in some area's where has a signal congustion & connection loss problems, then create a Point to Point Wireless Link on A Band  (5.8Ghz Band )  and further transmit or Create Wi-Fi Hotspot on 2.4Ghz Band. It is mostly used in repeater functionalities.

Encryption

A mechanism for providing data confidentiality.

Hotspot

A public location where users can access the Internet using Wi-Fi enabled devices. Access may be provided free or for a fee. Hotspots are often found at coffee shops, hotels, airport lounges, train stations, convention centers, and other public meeting areas. Corporations and campuses often offer it to visitors and guests.

IEEE

Institute of Electrical and Electronics Engineers. The IEEE is an international organization that develops standards for hundreds of electronic and electrical technologies. The organization uses a series of numbers (like the Dewey Decimal system) to differentiate between the various technology families.

LAN

Local Area Networks. A system that connects PCs and other devices within the same location in order to share resources such as Internet connections, printers, files and storage drives. When Wi-Fi is used to connect the devices, the system is known as a wireless LAN or WLAN.

Mesh Networking

A way to route data, voice and instructions between nodes

MIMO

Multiple Input Multiple Output. A technique that uses multiple receivers and multiple transmitters on both ends of a wireless connection to improve throughput and range. MIMO is expected to be the basis of the forthcoming 802.11n wireless LAN standard.

MiniPCI

Wireless functionality that is embedded onto the motherboard of the computer, typically installed at the factory, and is not removable or upgradeable.

OFDM

Orthogonal Frequency Division Multiplexing. OFDM is a modulation technique used in the 802.11a and 802.11g standards (previous 802.11b products used a modulation technique known as CCK). In an OFDM system, data transmissions are split among several narrowband channels at different frequencies, which reduces interference by preventing the demodulators from seeing frequencies other than their own.

PC Card

Wireless functionality can be added to notebook computers through the use of a removable network card which is inserted into a type 2 or 3 cardbus slot.

PCI Card

Wireless card that is installed in the PCI bus slot inside desktop PCs.

Point to Point Solution

Network where two points are connected one to the other

Point to Multipoint Solution

Network where multiple points (subscribers) are connected to a single point (base station)

Print Server

A wireless print server allows multiple computers and other Wi-Fi enabled devices to share a printer without the use of cables. Print servers are typically connected via parallel or USB port to the printer, and allows files to be transferred wirelessly for printing.

Quality of Service (QoS)

Enables Wi-Fi access points to prioritize traffic and optimize the way shared network resources are allocated among different applications. Without QoS, all applications running on different devices have equal opportunity to transmit data frames. That works well for data traffic from applications such as file transfers or e-mail, but it is inadequate for multimedia applications. QoS is required for multimedia applications (such as VoIP, video streaming, and interactive gaming), which are highly sensitive to latency increases and throughput reductions.

Repeater

A device that extends the coverage of an existing access point by relaying its signal.

Router

Wireless routers provide the same functionality as access points, but include the added features of allowing multiple users to share a wide area connection to a broadband modem-providing multiple IP addresses, firewall capabilities, and hub and switching functionality.

Throughput

The actual speed at which data is transmitted in a wireless network. Because of communication and protocol overhead, throughout is generally less than the data rate.

USB

Universal Serial Bus (USB) interface cards connect notebook and desktop computers to wireless networks via the client's USB port, rather than utilizing either embedded mini-PCI or removable PC cards.

WEP

The original security standard used in wireless networks to encrypt the wireless data. Because WEP had many flaws that were easily cracked, it has been replaced by stronger security technologies, such as WPA and WPA2.

Wi-Fi

A term developed by the Wi-Fi Alliance to describe WLAN products that are based on the IEEE 802.11 standards.

Wi-Fi CERTIFIED

The certification standard designating IEEE 802.11-based WLAN products that have passed interoperability testing requirements developed and governed by the Wi-Fi Alliance.

Wi-Fi Alliance

A non-profit organization that certifies the interoperability of 802.11 wireless LAN products. Products bearing the Wi-Fi CERTIFIED logo have been proven to work with Wi-Fi products from other vendors. The Alliance also makes sure that certain security and performance features are interoperable, to improve the Wi-Fi user experience.

Wi-Fi Multimedia (WMM)

A group of features that improves the user experience for audio, video and voice applications on wireless networks. Based on the IEEE 802.11e draft standard, WMM adds prioritization capabilities to Wi-Fi networks and optimizes their performance when multiple concurrent applications, each with different latency and throughput requirements, compete for network resources.

WiMax

The common name for the forthcoming IEEE 802.16 standard. Wi-Max is will provide last-mile wireless broadband access to areas in which cable or DSL are not feasible. For additional information, visit http://www.wimaxforum.org/home.

Wireless Ethernet Transceiver (WET)

Allows you to convert an Ethernet- based device into a wireless device by connecting the wireless transceiver/bridge to an Ethernet Port.

WPA

Wi-Fi Protected Access. A security standard that uses the latest encryption and authentication technologies to provide strong data protection and network access control for wireless networks. WPA was designed to secure all 802.11 devices, and can be found on all 802.11b, 802.11a and 802.11g products that are Wi-Fi CERTIFIED.

WPA2

Wi-Fi Protected Access 2, also known as 802.11i. The latest security method that provides even greater data protection and network access control for wireless networks. The primary difference is that WPA2 uses the government-grade AES encryption algorithm and 802.1X-based authentication, which are required to secure large corporate networks.