News

ADH Communications just joined Manta.

ADH Communications becomes the manufactures representative for YR20 for the SouthEast.

ADH Communications becomes an authorized reseller for SonicWall.

ADH Communications just joined the Chamber of Commerce of Gwinnett County!

ADH Communications has projects going on in 7 different states!

Testimonials

I have worked with Hartmut and ADH on several occasions. “The ADH goal of providing one with the best technology yet cost effective solutions shows their concern for their customers”
-Tim O’Neill  - The “Oldcommguy™”
B.T. Solutions, Inc.

Media

What We Do

A leading supplier for converged networks

Provides the best possible solution at the best possible price

Is a partner to our customers

Helps with all your needs to design, install and maintain your mission critical networks

Providing, Installing & Supporting
-Wired and wireless networks
-Triple play networks infrastructure
-High speed back-bone networks
-Industrial Ethernet production control networks
-And more

Contact Info

Address:
PO Box 443
Lake Geneva, WI 53147

Phone:
(844)852-6856

e-mail
or simply fill out the form on the contact page.

ADH Communications Manta Profile

 

Fiber Optics

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Numbers

 

Numbers

1U:Abbreviation for "one unit""U" = 1.75 inches.
4B5B Encoding: A signal modulation scheme in which groups of four bits are encoded and transmitted in five bits in order to guarantee that no more than three consecutive zeroes ever occur; used in FDDI.
4:1:1: The set of sampling frequencies used to digitize the luminance and color difference components (Y, R-Y, B-Y) of a video signal. The four represents 13.5 MHz, the sampling frequency of Y, and the ones each 3.75 MHz for R-Y and B-Y.
4:2:0: A sampling system used to digitize the luminance and color difference components (Y, R-Y, B-Y) of a video signal. The four represents the 13.5 MHz sampling frequency of Y, while the R-Y and B-Y are sampled at 6.75 MHz ?effectively between every other line only (one line is sampled at 4:0:0, luminance only, and the next at 4:2:2).
4:2:2: A commonly used term for a component digital video format. It is generally used as shorthand for ITU-R 601. 4:2:2 is the standard for digital studio equipment.
Chroma Samples
4fsc: Abbreviation for four times the frequency of SC (subcarrier). The sampling rate of a D2 digital video signal with respect to the subcarrier frequency of a video signal. The 4fsc frequency is 14.3 MHz in NTSC and 17.7 MHz in PAL.

8B10B Encoding: A signal modulation scheme in which eight bits are encoded in a 10-bit word to ensure that too many consecutive zeroes do not occur; used in ESCON and fibre channel.

802.3 Network: A 10 Mb/s CSMA/CD bus-based network; commonly called Ethernet.

802.5 Network: A token-passing ring network operating at 4 Mb/s or 16 Mb/s.

10BASE-F: A fiber optic version of an IEEE 802.3 network.
10BASE-FB: That portion of 10BASE-F that defines the requirements for a fiber backbone.
10BASE-FL: That portion of 10BASE-F that defines a fiber optic link between a concentrator and a station.
10BASE-FP: That portion of 10BASE-F that defines a passive star coupler.
10BASE-T: A twisted-pair cable version of an IEEE 802.3 network.
10BASE-2: A thin-coaxial-cable version of an IEEE 802.3 network
10BASE-5: A thick-coaxial-cable version of an IEEE 802.3 network; very similar to the original Ethernet specification.

 

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Numbers

Copyright © 2010 by David R. Goff. Used by permission. All rights reserved.