AS2525 datasheet(15/26 Pages) AMSCO

15 / 26 page

Preliminary

AS2525

Rev. 1.3

Page 15

May 1999

Dial Mode Selection

The default signalling mode (LD or MF) is selectable

through following procedure:

1. Press [PG] to enter programme mode

2. Press [3] to enter dial select mode

3. Press [0] for LD and [1] for MF

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

hook to abort

When default LD mode is selected, a temporary

change to MF can be invoked by pressing the [

∗]

key. Temporary MF select with tone on first key

pressure can be selected as option (see also Table

3: Parameter settings). The circuit will revert to LD by

pressing the [FL] key or by next on-hook.

Re-Dialling (Last Number Redial)

Re-dialling is a facility that allows re-signalling of the

last dialled number without keying in all the digits

again. Numbers dialled out from any memory will

also be stored in the LNR memory. The re-dialling

works in following manner:

• Any digit (including Flash, Pause, and MF select)

being dialled is storable in the LNR memory up to

a total of 31 digits.

• If more than 31 digits are entered, re-dialling will

be inhibited.

• Pressing the [R/P] key as first entry after off-hook

(LNR cursor at first digit) will invoke dialling the

content of the LNR memory.

• If the [R/P] key is pressed after entering one or

more digits, the key will function as a pause key

and each pressure will insert a pause.

Pauses can also be inserted by pressing the [R/P]

key in programme mode.

Flash Function

A flash, [FL] key, activation will invoke a timed loop

break. The flash duration can be programmed

through set-up (see Figure 5: Keys for HEX-code

entry and Table 4: Timing selection by HEX code):

Table 22: Flash duration setting

[PG] + [0] + (Password) + [

∗] + (digit) + (HEX) + [PG]

Digit

Timing

Flash Duration

[4]

HEX code

Flash 1

[5]

HEX code

Flash 2

One of two pre-programmed can be selected as

follows:

1. Press [PG] to enter programme mode

2. Press [2] to enter flash select mode

3. Press [0] for duration 1 and [1] for

duration 2

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

hook to abort

A flash entered will be stored in the LNR memory

together with entered digits. After a recall a 270 ms

pause will automatically be executed.

Pauses

Pauses can be inserted if the [R/P] key is pressed

after entering one or more digits. Also during

programming, pauses can be inserted by pressing

the [R/P] key. Default pause duration is 1 second

(P1) and an alternative pause of 3 second (P2) can

be selected. These pauses can be changed through

the set-up programming (see Table 3: Parameter

settings)

Memory Keys

The keys [M1] to [M8] are direct memory access

keys, [SH] key is used to access second level of

direct memories, and the [MR) key is used for key-

code dialling. Up to 26 numbers can be stored in the

on-chip RAM. Each number can contain up to 21

digits (including pauses).

During programming multiple pauses can be inserted

by pressing the [RD] key.

Example (45678P123 is stored in M1, where P is a

pause and 123 the extension number):

1. Off-hook, wait for dial tone

2. Press [M1]

• 45678 is dialled out

• Dialling halts (pauses)

• Dialling is resumed, 123 is dialled out.

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