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L3914AN Datasheet(PDF) 5 Page - STMicroelectronics |
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L3914AN Datasheet(HTML) 5 Page - STMicroelectronics |
5 / 15 page To dial a number from repertory memory (HKS must be low), enter the following: MEM (Location 0-9) or E1-E3 To save the last number dialed, enter the follow- ing: PROG MEM (location 0-9) or E1-E3 HOOK FLASH D1 FLASH D2 ...etc Hook flash may be entered into the dialed se- quence at any point by keying in the function key, FLASH. Flash consists of a timed break of 585ms, 300ms or 100ms depending on the Mask option. When a FLASH key is pressed, no further key inputs will be accepted until the hookflash function has been dialed. The key input following a FLASH will be stored as the initial digit of the new number, overwriting the number dialed be- fore the FLASH, unless it is another FLASH. FLASH key pressed immediately after hookswitch or LND will not clear the LND buffer unless digits are entered following the FLASH key. Example: FLASH LND not cleared LND FLASH LND not cleared LND FLASH D1 D2 LND buffer will contain D1, D2 PAUSE/LAST NUMBER DIALED If the PAUSE/LND key is pressed right after off hook or FLASH key, it is considered as LND, if it is pressed after a digit, it will be considered as PAUSE. LAST NUMBERED DIALED OFF-HOOK PAUSE/LND or FLASH PAUSE/LND Last number dialing is accomplished by entering the PAUSE/LND key. PAUSE OFF-HOOK D1 PAUSE/LND D2 ...etc A pause may be entered into the dialed sequence at any point by keying in the special function key, PAUSE/LND. Pause inserts a 3.1 second delay into the dialing sequence. The total delay, including pre- digit and post-digit pauses is shown in Table 3. Table 3: Special Function Delays Each delay shown below represents the time re- quired after the special function key is depressed until a new digit is dialed. The time is considered ”FIRST” key if all previous inputs have been com- pletely dialed. The time is considered ”AUTO” if in redial, or if previous dialling is still in progress. Function First/Auto Delay (seconds) Pulse Tone SOFTSWITC H FIRST AUTO 0.2 1.0 PAUSE FIRST AUTO 2.6 3.4 3.0 3.1 HOLD When HOLD key is pressed during off hook, there are two options. The first option is to mute the phone (LED will blink) and the conversation can be resumed by pressing the HOLD key again. The second option is to mute the phone (LED will blink), on-hook the phone (LED will still blink at 1Hz frequency) and automatic switch off the phone when parallel phone is off-hook. The HOLD function is disabled when the line cur- rent drops below 20mA. SOFTSWITCH FUNCTION USING TONE/PULSE MODE SWITCH When dialing in Pulse mode after off-hook, switch- ing TONE/PULSE mode switch from Pulse to Tone will cause the device to change the signaling mode into tone signal and store the softswitch function in the LND memory for redial. To redial the softswitch function (mixed mode dialing) in the pulse mode af- ter going on-hook and back to off-hook, you have to switch the TONE/PULSE mode switch back to pulse mode either before going on-hook or after off- hook or during on-hook. Subsequentmode change from Tone to Pulse will change the signaling mode to pulse dialing se- quence but this mode change will not be stored in .the LND memory. When dialing in Tone mode after off-hook, a switch- ing of TONE/PULSE mode Switch from Tone to Pulse will cause the device to change the signaling mode into pulse mode but this mode change will not be stored in the LND memory. When LND key is pressed in Tone mode after going off-hook, the device will output all tone signals. A pacifier tone of 75ms is provided after 32ms deboun ce time when switching from Pulse to Tone mode. Redial by the LND key will repeat the mixed dial- ing sequence in Pulse mode. FUNCTION PIN DESCRIPTION (continued) L3914A - L3924A - L3934A 5/15 |
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Similar Description - L3914AN |
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