what is pbx system?

Answer 1

PBX is an acronym that usually stands for Private Branch eXchange or Private Business eXchange. It is the telephone exchange that serves a particular business or office. Usually, it is the device(s) responsible for directing calls within a specific business (allowing the use of, for instance, dialing three- or four-digit extensions instead of full telephone numbers for each person in a business).

Answer 2

PBX is exactly as mentioned several times above, Private Branch Exchange. A PBX serves a customer and equipment is located at a customer location(Not at a Telco Central Office) The customers phone gets its dial tone from the PBX not a Switch at a Telco Central Office. The customer can dial Intra PBX (usually 4 digits but calling patterns depend on needs and size of the customer) and no connection is made to a Telco Switch. This can save a company a massive amount of money. When a user dials 9 for a "Outside Line" the customer dials their call into the PBX the PBX translate the dialed digits and connects to the Telco over a Out dial Trunk.

The best way to explain it is that a customer has their own phone company in their own building.

Answer 3

A PBX is usually considered a keysystem, or personal telephone system for a company. I work on a SL-100 it is a large telephone switch, what most large telephone companies have (qwest, SBC, BellSouth) It is considerd a PBX the reason being is any incoming calls to my switch terminate here. No call is automatically routed to another central Office.

Well i guess i wasnt clear with my answer, I consider any small PBX a keysystem and the other way around (old 1A2, norstar, cortelco 3100). They all can have #'s programed to each individual key on there associated sets, its not just line 1 and 2 and so on. The switch i work on is a Central Office the reason I consider it a PBX, is because no calls are routed into my switching equiptment and then out to another Central office. All incoming calls terminate here.
A PBX is a telephone system within an company that switches calls between users on local lines while allowing all users to share a certain number of external phone lines.

Answer 4

A PBX is a telephone system that allows single users on a phone system access to multiple lines and directly access each other on premises or off site using a pre-programmed numbering plan. It is not a key system. A key system has standard buttons labeled "LINE 1" "LINE 2" and so on. You select the line you want and it is always the same number on it. A PBX has "pooled" line appearances, where your "Call" button allows you to make calls whether they are internal or external, because your desk phone doesn't have the capacity to have 96 or so lines appear on it directly. If you have to dial "9" you are probably on a PBX. I can go on all day, hope this brief helps!

Answer 5

Russell (above) has an excellent explanation.

In addition, the hospital I used to work at had a PBX system. In various instances of outbound calls, various ph#s would appear (on caller ID, etc) that looked like actual ph#s, but were trunk #s which wouldn't accept calls in on, if dialed as appeared.

Answer 6

Private Branch eXchange. It is norammly the first three numbers of your pohone number aka (xxx) 123-xxxx. Buisnesses that have a lot of numbers use this and then can dial only the last numbers to contact other lines.

Answer 7

Private Branch exchange is what it stands for --