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Topic: Telephone lines


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In the News (Wed 10 Feb 10)

  
  ATCS Newsletter The Evolution of Telephone Cable
Telephone lines were needed to connect private telephones with the central interconnection facility.
Telephone cables were needed to replace the large number of aerial wires present in the cities.
Improvements were continually being made to telephone cable, the use of more and finer conductors in a given cable, lower electrostatic capacity requirements and a larger air to paper ratio of the insulation.
www.telephonecollecting.org /cable.htm   (0 words)

  
 Requirements for New Telephone Lines
A decision on whether or not to provide additional telephone lines after January, augment the existing telephone system, or begin obtaining temporary telephone service from GTE should be made with ample time for implementation.
Move some telephone equipment (e.g., modems and emergency telephones) off of the GTD4600 onto GTE business lines in an effort to extend the useful life of the current configuration until July, 1996 and then replace the system in July, 1997.
Requests for new telephone lines between July, 1996 and July, 1997 could not be satisfied and the campus community would probably not accept this option.
www.commserv.ucsb.edu /reference/background/augment.asp   (0 words)

  
 Howstuffworks "How Telephones Work"
Although most of us take it completely for granted, the telephone you have in your house is one of the most amazing devices ever created.
Surprisingly, a telephone is one of the simplest devices you have in your house.
It is so simple because the telephone connection to your house has not changed in nearly a century.
www.howstuffworks.com /telephone.htm   (0 words)

  
  FERRYPORT FERRIES - Commercial vehicle and group telephone ferry ticket sales, timetables and tourist information.
Please Note: The telephone booking serivce must be used for commercial vehicle, freight, transit van, coach parties and groups larger than nine persons.
Ferry to France, Dover Calais Ferry, Ferry to Ireland, Ferry to Dublin, Ferry to Isle of Wight,
Ferry to Belfast, Ferry to Holland, Ferry to Bilbao, Ferry to Greece, P&O Ferry, P and O Ferry, North Sea Ferry, Irish Ferry, Brittany Ferry, Stena Line, Condor Ferry, Sea France, Hoverspeed Ferry, Eurotunnel,
www.ferryport.com /telephone_sales.html   (843 words)

  
  Monmouth Telecom Business Telephone Lines
Telephone lines to receive and place local regional, long distance and international calls.
Your office phone lines can be set up in a prearranged sequence to forward unanswered calls from one line to another until it reaches the last line in the group.
When Call Forwarding is active on the line with that service, you will hear a short reminder tone on your phone to indicate that a call to that line is being forwarded.
www.monmouth.com /busphonelines.htm   (1009 words)

  
  Telephone - MSN Encarta
Telephones are used for casual conversations, to conduct business, and to summon help in an emergency (as in the 911 service in the United States).
If it is a two-piece telephone set, the transmitter and receiver are mounted in the handset, the ringer is typically in the base, and the dial may be in either the base or handset.
The receiver of a telephone set is made from a flat ring of magnetic material with a short cuff of the same material attached to the ring’s outer rim.
encarta.msn.com /encyclopedia_761569402/Telephone.html   (873 words)

  
 telephone lines, and telephone facts
At the telephone exchange the DC voltage and audio signal are separated by directing the audio signal through 2 uF capacitors and blocking the audio from the power supply with a 5-Henry choke in each telephone line.
The telephone company wants the DC resistance of your telephone line to be about 10 megOhms when there's no apparatus in use ("on hook," in telephone company jargon); you can draw no more than 5 microamperes while the telephone is in that state.
The balance of the telephone line is known to your telephone company as "longitudinal balance." If both impedance match and balance to ground are kept in mind, any device attached to the telephone line will perform well, just as the correct matching of transmission telephone lines and devices will ensure good performance in radio practice.
www.affordablephones.net /phoneline.htm   (1090 words)

  
 Applications: Telecommunications - The Evolution of Telephone Cable
Telephone lines were needed to connect private telephones with the central interconnection facility.
Telephone cables were needed to replace the large number of aerial wires present in the cities.
Improvements were continually being made to telephone cable, the use of more and finer conductors in a given cable, lower electrostatic capacity requirements and a larger air to paper ratio of the insulation.
www.copper.org /applications/telecomm/evolution.html   (1459 words)

  
 Atlanta Telephone History
In 1877, the first telephone line in Atlanta was a private line connecting the Western and Atlantic Freight Depot with Durand's Restaurant in the Union Passenger Station.
Everyone on the party line heard the ringing and had to listen for his or her assigned ringing pattern, while ignoring everyone else's.
On the first telephone lines, using the single wire, grounded system, coded ringing was the only system available for signaling parties on a party line.
home.speedfactory.net /cardwell/part1.html   (3543 words)

  
 ePanorama
Telephone line signal to noise ratio is not as easy to quantify because noise comes in many forms, such as electrical interference from fluorescent fixtures or hiss from the many amplifier stages in the voice path.
Telephone line equipment are designed for specific 600 ohms impedance (or 900 ohms on some places, varies somewhat from country to country) to match the impedance of the line and the equipment on the other line end.
Telephones are designed to work in such way that there can be many telephones on the line, but the system is designed so that only one of them can be in use at the time.
www.epanorama.net /links/telephone.html   (13460 words)

  
 Telephone Lines - NetCom - Office of Information Technology - University of Utah
A telephone line in simplest terms is your dial tone.
You have a telephone line based on the voice system that your department is using: Coral, Centrex, or flat lines through Qwest (for some off-campus locations).
Telephone sets options are based on the kind of phone line they use.
www.it.utah.edu /services/phones/lines.html   (239 words)

  
 Reminders About Telephone Lines
While you are using a phone line with your modem, no one else can use it for a voice call.
You might consider getting a second telephone line for your modem if you plan to connect often.
Many hotels use digital telephone systems, and if you plug your modem into a jack intended for the digital phone, it may cause damage to your modem.
www.washington.edu /computing/connect/telcolines.html   (0 words)

  
 Howstuffworks "How Telephones Work"
Although most of us take it completely for granted, the telephone you have in your house is one of the most amazing devices ever created.
In this article, we will look at the telephone device that you have in your house as well as the telephone network it connects to so you can make and receive calls.
Surprisingly, a telephone is one of the simplest devices you have in your house.
communication.howstuffworks.com /telephone.htm   (391 words)

  
 Telecom Audio - Phone Lines Demystified
The terms "PBX" and "Key" both refer to hardware that enables several telephones to be connected to a smaller number of telephone lines.
On an electronic PBX telephone, two wires are often used as control lines, which send keypress data to the PBX, and ringer and LED data back to the phone.
An “outside line” refers to a direct connection to the telephone line outside of the building, also referred to as an "analog line", or "POTS line" (Plain Old Telephone Service), in other words a standard residence type phone line.
www.telecomaudio.com /article02.html   (1024 words)

  
 Comrex Tech Notes: Tips for Correcting Bad Phone Lines
If you are going to use a dial (switched) telephone line for program transmission or for a talk show, you will want it to have good frequency response, low noise and low hum.
If you are considering calling up the telephone company business office and complaining you might as well write your complaint on a piece of paper and place it in a bottle and throw it in the ocean.
If you choose to connect to the telephone lines through a PABX or a call controller or a “little gem eureka,” all we can do is wish you luck.
www.comrex.com /support/technotes/tn206.htm   (1869 words)

  
 Merlin Telephone   (Site not responding. Last check: )
When no lines are in use a red light indicates the line that will be used when you pick up the receiver.
When the first line is in use, the system uses the next line in a set sequence.
While the telephone system typically uses "Main Pool" lines for outgoing calls and specific numbered lines for incoming calls, you may set a direct line as the default outgoing line.
cit.nih.gov /dnst/DNSTweb/merlin.html   (998 words)

  
 Radio and telecommunications equipment installers and repairers
From electronic switches that route telephone signals to their destinations to radio transmitters and receivers that relay signals from wireless phones, the workers who set up and maintain this sophisticated equipment are called radio and telecommunications equipment installers and repairers.
Although most telephone lines connecting houses to central offices and switching stations are still copper, the lines connecting these central hubs are fiber optic.
As cellular telephones have increased in popularity, the number of pay phones is declining, which also will adversely affect employment of station installers and repairers as pay phone installation and maintenance is one of their major functions.
www.bls.gov /oco/ocos188.htm   (2172 words)

  
 Distributing Music Over Telephone Lines (1909)
The box is attached to the line wires by a bridged tap from the line circuit.
At the central office, the lines of musical subscribers are tapped to a manual board attended by an operator.
Several lines can be connected to the same machine at the same time, if more than one happens to call for the same selection.
earlyradiohistory.us /1909musi.htm   (888 words)

  
 Sectoral Note - Telecommunications
A main line is normally identified by a unique number which is the one which is billed.
If these growth rates are maintained in developing countries, the average telephone density could actually decrease by the year 2000 since the population growth is expected to outstrip the gain in telephone lines.
Average annual growth rates in the main lines for selected countries between 1983-93 is shown in Figure 2A and the telephone densities in those countries in 1993 are shown in Figure 2B.
www.worldbank.org /html/opr/pmi/telecom/teleco00.html   (1774 words)

  
 CITES :: Telecomm :: Telephone :: Lines and Extensions
Both single-line and multi-line telephone service, as well as extensions, are offered.
Installation charge: $50 per line plus time/materials if a new phone jack/wiring is required.
These are single-line stations wired as extensions, which share a telephone number and line with the main station.
www.cites.uiuc.edu /telephone/lines.html   (191 words)

  
 CPS, Inc. - Sharing Telephone Lines
Most telephone lines are under utilized making the effective cost for actual usage much higher than it appears.
The Telephone Line Sharing products can obviously be used separately, but the great thing about the CPS product line is that many of the products can also be combined to exponentially increase the telephone line utilization and savings.
If your application only requires one or more of the products or the number of lines at this time, simply hold your finger over those that may not be needed, while keeping in mind that they can be added as your requirements change.
www.cpscom.com /share.htm   (1092 words)

  
 DUALjack Wirelessly Extends Telephone Lines - Gizmodo
Split into two units, the base unit plugs an electrical outlet and has a plug for the main telephone line.
In the next room you plug in the extension unit which then wirelessly receives the telephone line signal.
But yes, the concept is quite old, and the newest thing would be networking over power lines, which is several years old as well.
gizmodo.com /gadgets/gadgets/dualjack-wirelessly-extends-telephone-lines-195142.php   (442 words)

  
 TC8800 Telephone/Data Fiber Multiplexer - Fiber Optic Modems, Multiplexers, Multidrop (SCADA) Modem, RS-232, RS-422, ...
The TC8800 is typically used to link or extend data and telephone lines in campus networks.
The TC8800 is a 4-to-28 channel telephone and data fiber optic multiplexer that extends multiple telephone lines, analog and data channels to remote sites such as other buildings in campus networks.
RJ-11F ports are provided on the rear side to connect with telephones, analog and data devices.
www.tccomm.com /TC8800.htm   (451 words)

  
 Telephone sets & lines- Yale ITS Telecom
Visit the Telephone hardware page for a complete description of the features available for your telephone and how to use them.
Be sure you have plugged your telephone into all the jacks in the room to see which one is activated.
Try your phone in a room that has telephone service to see if your telephone is working or try another telephone in your jack.
www.yale.edu /its/telecom/telecom.html   (484 words)

  
 Using the ACCC Dialin Lines
All the ACCC dialin lines are off campus and you will be charged by the minute on your campus phone bill if you dialin using them (the 666-2001, 666-2002, and 666-9000 lines) from on campus.
The new-style dialin lines are not in the UIC campus exchange -- you must dial the complete phone number, including the 666 exchange even from on campus.
So don't use the new-style ACCC dialin lines from an on-campus phone; having your computer connected to the campus ethernet backbone is a much better, faster, and cheaper alternative.
www.uic.edu /depts/accc/network/dialin   (1400 words)

  
 SignOnSanDiego.com > News > Business -- You dig those overhead lines?
A four-year dispute over the burying of overhead electric, cable and telephone lines has left some San Diego neighborhoods with sawed-off utility poles and forced the city to pay for costs it has no guarantee of recovering.
SBC filed its request to charge all customers, including low-income customers who have lifeline service, a flat rate of 77 cents a month per telephone bill in 2007, $1.51 a month per bill in 2008 and 90 cents a month per bill for every month after that until the project was complete.
Now, San Diego is paying for the design work and conduit for the phone lines to be laid at the same time the electric and cable lines are undergrounded.
www.signonsandiego.com /news/business/20061119-9999-1b19phones.html   (1381 words)

  
 Simon Reilly's Blog: Control "Telephone" Dramas
At 11am I was pulling out of the entrance to the project and a telephone line truck was pulling in.
It seems that all the telephone lines that had been pulled up from the underground the previous day were all in wrong direction.
The telephone lines that needed the repair were in the opposite direction.
www.leadingadvisor.com /blog/archives/2006/01/control_ateleph.html   (926 words)

  
 OpenHouse Telephone and Data Modules - HomeTech Solutions
Choose from a wide variety of modules designed to connect telephone lines together, and data lines to a switch or router.
The DMT-16 Telephone Distribution Module is the first in a series of distribution modules available in the ChannelPlus structured wire line of products.
Additional features include individual line LED indicators for surge events and an easy labeling system for integrated wire management and location identification.
www.hometech.com /techwire/ohtp.html   (560 words)

  
 PBX Phone Systems by TalkSwitch
2 telephone lines, 4 VoIP trunks, 4 local analog or IP extensions.
2 telephone lines, 8 local analog or IP extensions and 10 remote extensions.
4 telephone lines, 8 local analog or IP extensions and 10 remote extensions.
www.talkswitch.com /products   (0 words)

  
 ITS Telephones: Lines and Wall Jacks   (Site not responding. Last check: )
Telecommunications and Networking (TN) installs all voice lines for telephone, fax, and modem service on the University main and area campuses.
TN also provides repair or maintenance of all telephone lines and equipment purchased or leased through the department.
Each wall jack port is programmed specifically for one line, e.g., phone number, and the type of equipment, e.g., deskset or fax machine, connected.
www.utexas.edu /its/telephone/lines   (231 words)

  
 Alexander Graham Bell and His Telephone
This interest lead him to invent the microphone and, in 1876, his "electrical speech machine," which we now call a telephone.
Bell imagined great uses for his telephone, like this model from the 1920s, but would he ever have imagined telephone lines being used to transmit video images?
Fiber optics are improving the quality and speed of data transmission.
sln.fi.edu /franklin/inventor/bell.html   (197 words)

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