Telecommunication Services

Telecommunication Services:

The International Subscribers Dialing(ISD):

The International Subscribers Dialing (ISD) is the overseas equivalent of Subscribers Trunk Dialing (STD). A code number is given to each country. The country number, the area code number and the customer number are dialed to get the connection. Communication is possible throughout the world. Currently mobile phones have made International Calls much easier and cheaper due to competition among service.

PBX (Private Branch Exchange):

A manually or automatically operated telephone facility that handles communications within an office, office building, or organization and that is connected to the public telephone network.

A PBX (Private Branch Exchange) is a telephone system within an enterprise that switches the calls between enterprises users on local lines while allowing all users to share a certain number of external phone lines. The main purpose of a PBX is to save the cost of requiring a line for each user to the telephone Company’s central office.

The PBX is owned and operated by the enterprise rather than the telephone company (which may be a supplier or service provider, however). Private branch exchanges used analog technology originally. Today PBXs use digital technology (digital signals are converted to analog for outside calls on the local loop using plain old telephone service (POTS). Essentially a PBX is a telephone switch used by organizations and businesses. This device functions in the same manner as a traditional telephone switch board but is scaled down to accommodate business settings.

A PBX includes:

·              Telephone Trunk (Multiple Phone) lines that terminate at the PBX.

·              A Computer with memory that manages the switching of the calls within the PBX and in and out of it.

·              The network of lines within the PBX

·              A console or switch board for a human operator (optional).

Modern PBXs are built around a small computer, and some of them can be connected to a server for additional services such as call management, call detail reports, telemarketing etc.,

The functions of a PBX are the following:

·              Provide one single number that external callers can use to access all persons in a company.

·              Distribute calls to employees in an answering team in an even way: using the Automatic Call Distribution (ACD) feature.

·              Automatic call answering machine offers a menu of options from which a user can select to be directed to a specific extension or department.

·              Allow the use of customized business greetings while answering calls.

·              Provide system call management features.

·              Place external callers on hold while waiting for a requested person to answer, and playing music or customized commercial messages for the caller waiting.

·              Record voice messages for any extension from an external caller.

·              Transfer calls between internal extensions.

(PABX) Private Automatic Branch Exchange:

A Private automatic branch exchange (PABX) is an automatic telephone switching system within a private enterprise. Originally, such systems called Private Branch Exchanges (PBX) required the use of a live operator. Since almost all private branch exchanges today are automatic, the abbreviation “PBX” usually implies a “PABX”.

Benefits of PABX Systems:

PABX systems also known as E PABX or PBX, are widely used nowadays offices, hotels, various industries where there is requirement of intra-office communication between departments or otherwise, PABX is a must. No modern office can be thought of without PABX.

There are many benefits for having a PABX in an office. The nature of benefits may vary from one industry to another. Lists of some benefits which may be applicable across any industries:

1. Sharing of Resources:

One of the major benefits of having PABX is sharing of telecom resources. Usually, any office which has few PSTN (Public Switched Telephone Network) lines needs to be shared among many people in the office. PABX systems help sharing those limited number of PSTN connections PABC has PSTN Connectivity at one end, and many extension lines at the other end, which are given to many persons, various rooms, and tables.

When outsiders can call up those PSTN numbers and reach many extensions directly or by the help of an operator. Employees can also make outgoing calls from his chain directly by accessing PSTN line from his extension or through an operator.

2. Internal Office Calls and Call Transferring:

PBX enables the employees to communicate with each other within the organizations. Previously, officials used a bell and used to kick around an office peon to call someone. Now with the invention of the PABX can call employee through intercom whenever needed.