AS2525B datasheet(15/28 Pages) AMSCO

15 / 28 page

Datasheet AS2525

austriamicrosystems

Revision 2.1

Page 14 of 27

Dialing and Control Functions

Valid Keys

The key scanning is enabled in off-hook mode with VDD

above VREF. A valid key is detected from the keyboard by

connecting the appropriate row to the column (RON < 1

Ω). This can be done using an n x m keyboard matrix with

single contacts. Three diodes and a resistor are used to

extend the number of rows (see Figure 1: Keyboard

Layout).

PIN Code

A PIN code is available for protecting various user

settings. The default PIN code is set to 1111 and can be

change as follows:

1. Press [PG] to enter program mode

2. Press [1] + (PIN) + [0]

3. Key in new PIN code (valid digits: 0 - 9, #)

4. Key in new PIN code again

5. Press [PG] (= store and exit) or go on-hook to

abort

It is also possible to reset the PIN code through set-up

programming:

1. Press [PG] to enter program mode

2. Press [0] + (Password) + [#] + [0]

3. Press [1] to reset

4. Press [PG] (= store and exit) or go on-hook to

abort

Call Restriction

A call restriction function is accommodated. This function

can be activated using the PIN code. One or two digits can

be programmed to inhibit dialing starting with said digit(s).

If first digit(s) of a manual entered number or a number

retrieved from a memory matches the content of the call

restriction memory, dialing will be inhibited.

Storing digits for call restriction:

1. Press [PG] to enter program mode

2. Press [1] + (PIN) +

[∗]

3. Press [1] for entering first digit of call restriction

or [2] for entering second digit

4. Key in digit for call restriction

5. Press [PG] (= store and exit) or go on-hook to

abort.

Example 1:

Prohibit all calls with numbers starting with 0.

Activate: [PG] + [1] + (PIN) + [1] + [0] + [PG]

Deactivate: [PG] + [1] + (PIN) + [1] + [MT] + [PG]

Example 2:

Prohibit all calls with numbers starting with 09 (numbers

starting with 00…, 01…, etc. will be allowed; pauses will be

ignored, i.e. numbers starting with 0 PS 9 … will be

prohibited).

Activate: [PG] + [1] + (PIN) + [1] + [0] + [PG] + [PG] + [2] +

(PIN) + [1] + [9] + [PG]

Deactivate: [PG] + [1] + (PIN) + [1] + [MT] + [PG] + [PG] +

[2] + (PIN) + [1] + [MT] + [PG]

Pressing the [MT] key in place of the digit during

programming will cancel said call restriction. The first and

second digit can be stored, changed or deleted

independent of each other.

Key Lock

A key lock function is provided to allow the user to protect

the telephone from any misuse. When this function is

available through the set-up programming, it is possible to

enable/disable the key lock using the user PIN code.

Enabling/disabling key lock:

1. Press [PG] to enter program mode

2. Press [1] +(PIN) + [#] + [6]

3. Press [1] for enable or [0] for disable

4. Press [PG] (= store and exit) or go on-hook to

abort

Also an easy key lock function is provided. This function

can be activated/deactivated when the key lock function is

available through set-up programming and the previous

mentioned key lock through PIN code is disabled.

Clear Memory Procedure

It is possible to clear all stored numbers by using the PIN

code as follows:

1. Press [PG] to enter program mode

2. Press [1] + (PIN) + [#] + [7]

3. Press [1] for clear

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