12

Rev. 7

July 1998

Data Sheet

AS2533...6

Operating Procedures

Procedure Principles

The procedures for utilizing the features of the AS253x are optimized out of consideration for the human factor in

order to:

- meet the user´s expectations

- be easy to learn and relearn

- not invoke any automatic functions which the user doesn´t expect

- protect the user from committing critial errors, e.g. dialling wrong numbers, deleting stored numbers, etc.

- be consistent, simple and usable.

The following pages describe the operating procedures for the provided features. Pressing an unvalid key or key

combination during programming will cause the device to abort the programme state. Pressing any key

combination or sequence which is not described or defined may cause the device to enter a state or mode that

does not comply with the expectation of the user. In such cases, any undesired state can be terminated at any time

by going on-hook / off-hook which will generate a functional reset.

Idle (on-hook,

no ringing)

Speech mode

Programming

False programme

entry

Invalid entry

TEXT

State according

to text

Privacy mute

X

sec

or

Time out (x sec.)

Dialling

(LD or MF)

Storing (writing

into RAM)

Processing

according to text

TEXT

reading from

memory

KEY

Going off-hook

Going on-hook

Pressing a key

Entering a

number

Entry according

to text

TEXT

Symbols

STATES

ENTRIES

PROCESSING