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AS2535 Datasheet(PDF) 7 Page - ams AG |
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AS2535 Datasheet(HTML) 7 Page - ams AG |
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7 / 25 page  7 Rev. 7 July 1998 Data Sheet AS2533...6 The centrex keys are not stored in the RAM, and subsequently entered digits are buffered in FIFO. Last Number Redial LNR is a facility that allows resignalling of the last manually dialled number without keying in all the digits again. The LNR is repeatable after each off-hook. The current content of the RAM is overwritten by new entries. A manually entered number is automatically stored in the LNR RAM. The capacity of the RAM is 31 digits. If a number greater than 31 digits is entered, the LNR facility will be inhibited (until new entries < 32 digits) and further entries will be buffered in FIFO. Pauses can be inserted by pressing the PS key (not AS2535). Post dialled digits, i.e. digits manually entered after LNR has been invoked, are not stored in RAM but buffered in FIFO. Repeat Dialling (not AS2535) The last manually dialled number can be repeated without going on-hook by pressing the RP key. If a called number is engaged, pressing the RP key will break the line for 1.6 second (to get a new dial tone) and after a pause the number will be repeated. The repeat function is enabled when prior to pressing the RP key, a number has been dialled, and it can be invoked an unlimited number of times until next on-hook. During the 1.6 second break the device is in power down mode to save current. Recall Function A recall (R1, R2 or R3 key) activation will invoke a flash (timed loop break), however, the R1 flash is never executed in LD mode. R2 and R3 will be executed independent of the mode. 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 digit. If pressing the recall key is not followed by digit entries, the LNR RAM remains intact. After a recall a 270 ms pause will automatically be executed. Memory Keys (not AS2534) The keys M1 to M12 are direct memory access keys and the MR key (AS2533/6 only) is used for abbreviated dialling. Memory arrangement AS2533/6 AS2534 AS2535 Storable numbers 14 0 12 Direct memory keys 4 0 12 Indirect memories 10 0 0 In the on chip RAM, numbers can be stored. Each number can contain up to 21 digits (including pauses). During programming multiple pauses can be inserted by pressing the PS (not AS2535) or the LNR key. Each pause inserted within the first 5 entries will automatically be terminated after 2 seconds whereas pauses inserted after location 5 in a digit string will halt dialling and can be terminated manually by pressing the PS (not AS2535) or the LNR key. The halt function allows in-dialling to an extention on a PABX. Example (45678–123 is stored in M1, where – is a pause/wait and 123 the extention number): off-hook, wait for dial tone press M1 (45678 is dialled out) await dial tone from called PABX press PS or LNR (123 is dialled out). Memory dialling is cascadable. However, the content of one memory must be dialled out before a new can be invoked. 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. Example (LNR content 912345, where 9 is access code): off-hook, wait for PABX dial tone press 9 and wait for external dial tone press LNR (12345 will be dialled out). Tone Generator The tone generator incorporates the DTMF tones, 3 basic frequencies for the tone ringer and pacifier tones. |
Similar Part No. - AS2535 |
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Similar Description - AS2535 |
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