SA2531 Datasheet, PDF (7/24 Pages) Sames – VERSATILE SINGLE CHIP TELEPHONE WITH 14 NUMBER REPERTORY DIALLER

SA2531 A/B/C/E/G/U
Post dialled digits, i.e. digits manually entered after LNR has been invoked, are not stored
in RAM but buffered in FIFO.
Pauses can be inserted by pressing the PAUSE key. (Further details of the Pause
Function are included in the Memory Keys section.)
Recall Function
A Recall (R key or R2 key) activation will invoke a Flash (Timed Loop Break).
If Recall is the first entry in a digit string, it will be stored in LNR RAM when digit(s) are
entered after the Recall.
If the recall key is depressed after a digit string has been entered or dialled out, the recall
will not be stored but buffered in the FIFO together with subsequently entered digits.
If pressing the recall key is not followed by digit entries, the LNR RAM remains intact.
After a recall a pause of 27ums or 3 seconds will automatically be executed.
On versions C/C/E/G a recall cannot be executed in LD mode.
Memory Keys
The keys M1 to M10 are direct memory access keys and the MEM key is used for indirect
or abbreviated dialling.
In the on chip RAM, 14 numbers can be stored. Each number can contain up to 21 digits
(including pauses).
During programming multiple pauses can be inserted by pressing the PAUSE key or the
LNR key. Each pause is 3 seconds (optionally 6 or 2 seconds) when inserted within the
first 5 digits otherwise a wait function that will halt dialling until the PAUSE key or the LNR
key is depressed.
Memory dialling is cascadable. However, the content of one memory must be dialled out
before a new one can be invoked.
Mute Function
The MUTE key is enabled in speech mode only. Depressing the MUTE key mutes the
microphone amplifier. Repressing the MUTE key deactivates the mute (toggle function).
Any key entry overwrites a mute activated by the MUTE key and mute will be deactivated.
When privacy mute is activated a reminder tone is applied to the earpiece.
Sliding Cursor Procedure
To accommodate easy and uncomplicated redialling (LNR) behind a PABX, a sliding
cursor protocol is implemented. If new entries match the previous RAM contents, pressing
the LNR key will dial out the remaining digits.
If there is an error in matching, the LNR will be inhibited until next on-hook, and the RAM
will contain the new number.
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