Category:Telephony

Telephony class in the US Army, 1917

The use of devices for voice communication, for example, cellular and digital telephone systems.

See the Telephone article for a history of the telephone.

Subcategories

  • Cellular telephone systems - a system of telephone communications organized around a series of fixed site radio transceivers which each operate over a base area
  • Centrex telephone systems - an abbreviation of Central Exchange, a telephone switching system where the switching equipment is provided at a central exchange instead of at the customer's premises (such as in a private branch exchange)
  • Digital telephone systems - a telephone system which relies on digital, instead of analog, equipment for its switching and monitoring functions
  • Telephone switching systems - the different systems used by telephone operators to connect calls from one user to another

Subcategories

This category has the following 4 subcategories, out of 4 total.

Pages in category ‘Telephony’

The following 136 pages are in this category, out of 136 total.

A

B

C

D

E

F

G

G cont.

H

I

J

K

L

M

N

O

O cont.

P

R

S

T

U

V

W

Media in category ‘Telephony’

The following 8 files are in this category, out of 8 total.