### equipment | phone:

Digital phone
* All digital phones work both on digital and analog systems, so they are called dual-mode.
* Many digital phones have one-button access to automated voice mailboxes.
* are harder to monitor.
* are more efficient and have longer talk and standby time than analog phones
  - likely to cause problems than analog phones
* consume less power than analog phones.
* offer greater protection against eavesdropping.
* send out pulsing energy.

Emergency phone
* Most emergency phones are red metal boxes with a push button.
* are the red phones located on each floor of the stacks.

Hand phone
* are usually more expensive than fixed line telephones.
* use either analog or digital technology.

Internet phone
* Most Internet phones use a roller to move a selection bar up and down the screen.
* are simply cell phones with a minibrowser.
* can also use other types of numbers.
* has the ability to connect countries in more ways then one.
* uses two computers and an internet connection.

Modern phone
* All modern phones use digital networks.
+ Mobile phone, Technology: Telephone :: Messaging
  * Most of the older cell phones used analog networks. All modern phones use digital networks.

Portable phone
* add another dimension of safety for a elderly family member.
* can interfere with some electrical equipment.
* emit low levels of microwave radiation.

Public phone
* are common from which all calls can be dialled.
* operate by phone cards.

Satellite phone
* are sensitive to power requirements and weather
  - the only reliable form of communication
  - totally different than cellular service
* have their own area codes.
* mean contact on shore for weather routing and emergencies.

### equipment | phone:

Smart phone
* are smaller than PDAs and are designed to make calls.
* can send and receive data much faster than older phones.
+ Mobile phone, Smartphones: Telephone :: Messaging
  * Data communication has also become faster. Smart phones can send and receive data much faster than older phones. The industry uses different standards to label the data transmission rates. 2G was introduced in 1991. 2G means '2'nd 'G'eneration'. 3G was introduced in 2002. This is comparable to a DSL or low end cable modem speed.

### equipment | phone:

Wireless phone
* Many wireless phones are dependant on satellites to bounce their signals.
* Most wireless phones are able to accommodate local ten-digit dialing
  - can receive messages
* are already more widespread than desktop computers.
* are an important personal safety tool
  - weapon in the war against domestic violence
  - cheaper than personal computers and are almost always with the user
  - convenient and often increase work efficiency
  - everywhere
  - small enough to fit in our pockets and purses
  - the fastest growing consumer products in history
* can be analog or digital, depending on the type of transmission signal
  - convenient items to own
* work by sending and receiving signals over radio waves.

### equipment | photographic equipment:

Light meter
* Many light meters serve as both reflective and incident meters.
* is an alternate term for exposure meter
  - photographic equipment
* measure the quantity of light in our scene.

Photographic material
* All photographic materials require a solid base.
* Some photographic materials start fading only after a few years' time.
* are extremely vulnerable to the effects of residual chemicals
  - hygroscopic, readily absorbing and releasing moisture
* based on photosensitivity are very sensitive to environmental conditions.
* is photographic equipment