Really that depends on the sophistication of the system that's needed. You can do anything from buying a few multi-line telephones (like this: http://www.Amazon.com/AT-26T-4-2dLine-Telephone-Speakerphone-281040-29/dp/B001S4BBJ6) to installing a full PBX system that's capable of coordinating large numbers of phones. It's possible to buy a PBX system used or to use a VOIP open source server.
You can call local phone service providers to accomplish that
asterisk.org (open source PBX) has exhaustive information on how to setup up and configure an office PBX system.
It may not be cheap, but at least it will be done correctly. It will likely be more affordable through your phone company. After all, you will probably buy the telephone system from the office supply store.
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A leather desk set is not needed for a home office, however it can be a great way to help you to organize a cluttered workspace.
VoIP pbx system has a minimal software and hardware requirements. The system can be housed inside your office space. You can hire a service provider which will assist you in putting up the whole system.
A basic telephone or telephone set is an analog base-band transceiver. It has a handset which contains a microphone and a speaker, better known as a transmitter and receiver. It has also a ringer and dialing mechanism.Telephone Functions:Overall the telephone set fulfills the following basic functions.The Receiver Mode Functions:An incoming signal that rings a bell or produces an audio tone, indicating that a call is being received.A signal to the telephone system indicating that the signal has been answered.Transducers to convert voice into electrical signals and electrical signals into voice.Indicates to the telephone system that a call is to be made when the handset is lifted.Transmit mode indicates that the telephone system is ready to use by receiving a signal called the dial tone.It provides a way of transmitting the telephone number to be called to the telephone systemIt receives an indication that the call is being made by receiving a ringing tone.Transmit mode of telephone set provides a means of receiving a special tone indicating that the called line is busy.This mode provides a means of signaling the telephone system that the call is complete.Source :http://electrapk.com/telephone-set-and-its-functions/
A butt set can be used to intercept a telephone.
A butt set is also known as a test set of a lineman's handset. It is a special telephone, used by telephone technicians to test and install local loop telephone lines.
If you are looking to improve the functions of your office, you might consider installing a telephone system office. These systems can provide a variety of functions that can greatly improve the efficiency and quality of your workplace. Many companies that provide this type of service can provide quotes online and assist you in choosing the right kind of products for your office. The benefits of having some sort of telephone system in your office are numerous. These systems can make it easier for customers to reach a specific employee when calling by directing them to dial an extension, or in some cases, simple say their party’s name into the phone receiver. This allows them to be connected to the right person without hassle and without the need for any additional interference. Voice message systems can also be added to the package, allowing callers to leave a brief message when their party in unavailable to speak with them at that time. Most telephone system office companies are able to provide free quotes online. All that is required is that you provide some basic information about the type of project that is going to be undertaken. Most of these surveys will ask for the number of people who will need to be a part of the system, and the nature of your current telephone use. There are several other services that can be added to your phone system, such as hold music, which will play soft background music when a caller is place on hold. This will make the notion of a call being placed on hold much less uninviting and can even improve your office’s image. Teleconferencing options are also available for companies who need to host and set up conference calls on a regular basis. Most telephone system companies offer a variety of name brand telephone products to choose from, so your options are not just limited to the kind of services you want to include, but you also have your choice of hardware. Most companies also offer specials on instillation or shipping depending on the size of your order.
Telephone teller is an option many banks have that allow you to receive account information such as balances and recent transitions. You generally an set up a pin the first time you use the system.
set up of caller-id on a nortel t7316 telephone