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1. ** How to search the site? **
2. ** I lost my dealer username / password? **
3. ** I want to be a Roline Dealer? **
4. ** Where is the nearest Roline Shop? **
5. Fibre Optic Cables?
6. Roline UPS differences
7. UTP, FTP, S/FTP cables - what's the difference?
8. What is Gender Changer?
9. What is KVM Extender?
10. What is KVM Switch?
11. What is Video Splitter?
12. What means AWG?
13. Which is the longest VGA cable?
 

 ** How to search the site? **top
roline-bg.com has a product base containing more than 1000 different articles and sometimes is difficult to find the product you are looking for.
Here takes part our search engine. How to use it...

 ** I lost my dealer username / password? **top
Please call: +359 2 / 816-49-18 or mail to: v.vassilev@comelsoft.com

 ** I want to be a Roline Dealer? **top
Please call our hotline number: 02 / 816-49-11 or mail your question to: info@comelsoft.com

 ** Where is the nearest Roline Shop? **top

Contact Roline dealer near you:

Bulgarian Roline Dealers

 Fibre Optic Cables?top
Fiber optic (or "optical fiber") refers to the medium and the technology associated with the transmission of information as light impulses along a glass or plastic wire or fiber.

Fiber optic wire carries much more information than conventional copper wire and is far less subject to electromagnetic interference. Most telephone company long-distance lines are now fiber optic.

Transmission on fiber optic wire requires repeating at distance intervals. The glass fiber requires more protection within an outer cable than copper. For these reasons and because the installation of any new wiring is labor-intensive, few communities yet have fiber optic wires or cables from the phone company's branch office to local customers (known as local loop).

For additional information we suggest the following site:
Fiber Optic Tutorial

Product Pages: Roline Fiber-Optic Patch Cables

 Roline UPS differencestop
Roline UPS (Uninterruptable Power Supply) devices fall in three main categories specified by its topology and the following 'voltage phenomenoms' they protect against:
1. Outage-Blackouts; 2. Sags/brownouts; 3. Dynamic Overvoltage; 4. Undervoltage; 5. Overvoltage; 6. Lightning; 7. Transients (Surge); 8. Frequency Variations;
9. Voltage Distortion hf (Burst); 10. Voltage Harmonics


Category 3: Covers the devices from the Personal Secure product line.
These UPSs are also known as Off-Line orVFD (Voltage & Frequency Dependant). These are cost-effectrive solutions for SOHO users. Protect agains situations 1 to 3 shown above.

Category 2: These are devices from the Line Secure product line.
Also known as Line-Interactive or VI (Voltage Independant) these devices are intended for these users who want more protection than Off-Line devices can offer, but do not want to pay for the real double-conversion UPS from Category 1. Line-Secure Series gives the user true Sine-Wave output, Advanced Battery Management and reliable shutdown solution
Protects against situations 1 to 5.

1: Devices in the Pro Secure product line.
Also called On-Line, Real Double-Conversion, or VFI (Voltage & Frequency Independant). This is the most reliable solutions for projects from any scale, protecting your equipment agains any of the above power-line disturbances.
Pro Secure means total independence and complete isolation between input and output for voltage and frequency. This double conversion topology is recognized as industry's most reliable topology available now.


Product pages: Roline UPS Devices

Power Point Presentation

 UTP, FTP, S/FTP cables - what's the difference?top
The network patch cables Category 5 (Cat. 5e) are used for structured building cabling for applications strating from 100 to 250 MHz.
All three consist of 8 copper wires (AWG-24 for UTP and AWG-26 for FTP/S-FTP). What is the difference:
UTP (Unshielded Twisted Pair) cables are unshielded, less-expensive cables. They are more pliable to electromagnetic interferences and typically are used in SOHO environments.
FTP (Foil-screened Twisted Pair) cable is a cable containing multiple pairs of copper wire enclosed in a sheath of aluminum foil. It's used in wiring systems in buildings or other environments where heavy noise adjacent to the wire might cause interference. The foil provides insulation not afforded by UTP (unshielded twisted pair), the most common kind of structural wiring. The disadvantage of FTP is that it requires somewhat more care in "earthing" (grounding) than UTP and electrical impedances must be matched when connecting to UTP.
S/FTP are the same as FTP but they have a copper braid in addition to the aluminum laminated foil.

Product pages: Network Patch Cables

 What is Gender Changer?top
The Gender Changer is a simple adapter which allows a cable and port with same interface to be connected together.
For example - if you have a video cable with two 15-pin male connectors and KVM switch with the same male connector, you will be unable to link them. Here takes place our Gender Changer with two 15-pin female connectors.
Gender Changers are of various types - 9, 15, 25-pole, Centronics, USB...

Product Pages: Roline Gender Changers

 What is KVM Extender?top
The KVM Extender system consist of two devices - transmitter and receiver allowing for operating a single computer system remotely - trough the existing networking cable. The maximum operating distance may vary depending on the cable type - it is approx. 110 meters with standard Cat. 5 cables.
The Receiver unit is connected to the computer with cables for video, keyboard and mouse and to the receiver unit trough the network cable. The receiver on other hand, has connectors for the Monitor, Keyboard and Mouse which control the remote computer.


Product Pages: Roline KVM Extenders

 What is KVM Switch?top
KVM switch is short for keyboard, video, mouse switch, a hardware device that enables a single keyboard, video monitor and mouse to control more than one computer one at a time.
KVM switches are popular among users who have upgraded their home PC systems and want to still use their old computers but do not want to invest in a second keyboard, monitor and mouse. KVM switches are also used by business to save money when one person uses more than one computer and in server farms where it is only necessary to periodically access each separate server in the farm one at a time.


A typical KVM Switch has appropriate number of KVM inputs (2, 4, 8, 12, 16) for connecting the mice, keyboards and videocards of the machines, and single input for the keyboard, mouse and monitor used as a console.
KVM devices are highly varied - some offer keyboard and mouse emulation, which means that all the connected computers can be booted simultaneously (in case of power failure for example).
The switching takes place manually (with keys on the switch) or automatically (with keyboard shortcuts or on time intervals - which is extremely useful with security systems consisting of multiple computers)
Some KVM Switches has OSD menus for control and status and RackMount casings.
Other support daisy chaining which means that many switches can be connected one after another thus increasing the number of computers which can be managed from a single console.

Product Pages: Roline KVM Switches manual / automatic

Product Pages: Roline KVM cables

 What is Video Splitter?top
The Video Splitter (also called Video Distributor) is a device that allows the video output from one computer to be displayed simultaneously on multiple VGA monitors - 2, 4, 8, 16... It is a useful solution for presentations and surveillance applications.

Product Pages: Roline Video Distributors

 What means AWG?top
American Wire Gauge (AWG) is a U.S. standard set of non-ferrous wire conductor sizes. The "gauge" means the diameter. Non-ferrous includes copper and also aluminum and other materials, but is most frequently applied to copper household electrical wiring and telephone wiring. Typical household wiring is AWG number 12 or 14. Telephone wire is usually 22, 24, or 26. The higher the gauge number, the smaller the diameter and the thinner the wire. Since thicker wire carries more current because it has less electrical resistance over a given length, thicker wire is better for longer distances. For this reason, where extended distance is critical, a company installing a network might prefer telephone wire with the lower-gauge, thicker wire of AWG 24 to AWG 26.
AWG is sometimes known as Brown and Sharpe (B&S) Wire Gauge

Product pages: Network Patch Cables

 Which is the longest VGA cable?top
The longest available VGA cables are 50 meters long:
11.04.5250-2, 11.04.5299-2, 11.04.5350-2, 11.04.5399-2

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