class 5
A cellular telephone within a cell communicates to the call tower, which in turn is connected to the cellular telephone switching office (CTSO) by the telephone line. The telephone switching Office is then connected to the local telephone system. If the cellular telephone moves from one cell to another, the cellular telephone switching office then hands the connection from one cell to another.
In the very early days when Graham bell had invented the telephone, the telephones were connected using point to point connection or in other words to connect each telephone to every other telephone one needed a wire. This meant if we had n telephones in the network we needed 2n-1 cables or wires. This was a near impossibility if you consider say 1000 telephones in the network which would give rise to 1999 connection. For this reason the switching offices were developed wherein all the telephones would be connected to the switching office. Connection between the caller and the cal lee would be made at the switching office if both of the them have a connection to the office or the call would be transferred to the next office. As the population increased more and more connections were required, which gave rise to the same situation as with telephones earlier(i.e more number of wires required to make the connection) which resulted in the formation of toll office. (The next higher hierarchal level) Today one can find hierarchy of upto 4 or 5 levels
Type your answer here...iphone trade in program that was around for a limited time only. sorry to say it, but youre too late ;(
A class 3 office
A telephone system is a key component in any office. An office telephone system is typically located centrally for the best use and convenience for everyone.
Central Office
You can get a new telephone directory at the office of your telephone provider. If you are new in a community, sometimes the municipal office will provide you one.
What are the disadvantages of having a network in an office?
Panasonic does not manufacture office telephone systems, but they do make phones that would work well in an office.
Cisco offers telephone office equipment. You can visit them at www.cisco.com
how can i telephone the main u.s. branch office of lloyds tsb bank?
How HIPAA has affected the use of telephone in the medical office