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- PLEASE DON'T BE SO SICK AND COPY THIS INFORMATION'S TO A LAMER OR TO AN
- BBS WITHOUT A GOOD(!) HPA CONFERENCE !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
- YOU NOW WHY !?!
-
- STRAIGHT of ··· PiNk NoIsE ···
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- TELTONE M-907 TONE DETECTOR AND ROTARY DIAL PULSE COUNTER
-
- FEATURES
- --------
-
- - A complete LSI digital TOUCH-TONE® detector and rotary dial counter
- contained in an assembly requiring less than 4.52 * 3.02 * 0.6 inches
- (115 * 76.25 * 15.24 millimeters).
-
- - Meets or exceeds telephone ccentral office requirements for DTMF
- reconition and voice talk- off protection.
-
- - Fully time- guarded rotary dial pulse counting.
-
- - Decodes all 16 DTMF digits and counts rotary dial digits.
-
- - Crystal controlled LSI digital circuitry assures maximum frequency
- detection accuracy and stability.
-
- - Provision for tone detection sensitity adjustment.
-
- - Selectable output formats of binary, 2 of 8 (2 of 7), and 1 of 12.
-
- - Selectable button- up or button- down operation.
-
- - Seperate outputs indicate dial pulse or early tone presence.
-
- - Low power consumption : Typically 60 ma at 12 VDC.
-
-
- GENERAL DESCRIPTION
- -------------------
-
- The TELTONE® M-907 Receiver Assembly is designed for applicattion where a
- high performace CENTRAL OFFICE GRADE TOUCH-TONE (DTMF. Dual- Tone Multi-
- Frequency) and/or a rotary dial pulse counter is required. The receiver's
- compact size and low heat emmission make it well suited for high density
- packaging.
-
- The receiver consists of a bridging buffer amplifier, dial tone filters,
- both high and low pass filters, dual limiters, and a crystal controlled
- digital frequency detector capable of detecting all 16 DTMF digits.
- A dial pulse counter detects rotary dial digits. Figure 1 displays the
- the functional block diagram. The unit can be programed to accept DTMF
- signals only, rotary dial pulses only, or to provide mixed DTMF and
- rotary dial operation with the further capability of cross- inhibiting
- as determined by the first digit received.
-
- Data outputs will interface with MOS or CMOS and will also drive one
- low power Schottky TTL gate or low-power transistor. The externally
- selectable outputs are available in 2 of 8 or 2 of 7 (as described in
- Table 1), binary, or 1 of 12 formats. Figure 2 displays the outputs
- available. A number of options, discussed in the Application Notes,
- are available to answer a wide variety of requirements, such as strobing
- by extemal equiqment.
-
-
- APPLICATION NOTES
- -----------------
-
- Applications for the TELTONE M-907 Assembly include PABX and central office
- receivers, data transmission, tone and/or rotary dial controlled dictation
- links, radio telephone systems, and other applications where a telephone
- dialing mechanism or an analogous device will be used to convey information.
-
- The TELTONE M-907 Receiver Module has been designed to provide maximum
- flexiblity in a variety of customized applications by selection from among
- the following features. Figure 3 displays a typical application using most
- of the listed features.
-
- BD (Button Down) Output, pin 12. The BD option provides an early tone
- presence signal that starts 16ms after a valid tone pair is detected
- and ends -25ms after the tone pair ends. This is displayes on the
- DTMF digit timing chart, figure 5.
-
- RD (Rotary Dial) Output, pin 4. The RD option provides an early dial
- pulse presence signal that starts at the leading edge of the first
- break pulse and ends 100ms after the trailing edge of the last pulse.
- This is displayed on the rotary dial timing chart, figure 6.
- __ __
- LC (Loop Current Not) Input, pin 29. The LC input is the rotary dial
- pulse input lead. A logic 0 (-V) represens and off- hook condition
- or make period. A logic 1 (+V) represents an on-hook condition or
- break period. For DTMF operation only. LC can be connected to (-V);
- then the receiver is enabled as long as the CLEAR input is at logic 0.
-
- OFF- Output, pin 5. The off-hook output goes high (logic 1)
- HOOK 100ms after the LC input goes low. The output goes low (logic 0)
- 300ms after the LC input goes high.
-
- DTI (Dual Tone Inhibit) Input, pin 2,
- and
- RDI (Rotary Dial Inhibit) Input, pin 1. For mixed DTMF and rotary dial
- operation, connect DTI and RDI to (-V). For rotary dial operation
- only, connect DTI to (+V). For DTMF operation only, connect RDI to
- (+V). For mode locking on the first digit detected, connect both DTI
- and RDI to GUDTA. The mode lock will be held until an on-hook
- condition occurs or a logic 1 is applied to the CLEAR input.
-
- HOLD Input, pin 28. For applications where the output data has to remain
- to unchanged for an extended time period, wheter or not additional
- digits have been received, switch HOLD to logic 1 after GUDTA occurs.
-
- CLEAR Input, pin 3. A logic 1 applied to CLEAR input will instantaneously
- reset the Receiver's DTMF outputs will be forced to the condition
- shown in the D state columns (rightmost) as conditioned by the logic
- levels on FCA and FCB, see figure 2.
-
- FCA (Format Control A) Input, pin 26.
- and
- FCB (Format Control B) Input, pin 27. The Format Control inputs determine
- the DATA output format. Figure 2 displays the varous outputs available,
- as determined by the logic levels at FCA and FCB. FCA and FCB can also
- be used as a data strobe. By holding both inputs at logic 1, all data
- outputs will remain at logic 1 until FCA and/or FCB are changed to
- logic 0.
-
- GUDTA (Good Data) Output, pin 23. After 35 milliseconds of valid DTMF
- detection, the DATA outputs change to the programmed output.
- GUDTA occurs within ten microseconds after DATA change and persists 25
- milliseconds after the end of DTMF detection, see figure 6. For DATA
- to be read during DTMF signal presence, strobe the leading edge of
- GUDTA (button down). For DATA to be read after DTMF signal presence,
- strobe trailing edge of GUDTA (button up).
-
- SEN (DTMF Sensitivity Adjustment) Controls, pins 6 and
- ADJ 7. For applications where extended DTMF detection sensitivity is
- required, connect a resistive shunt across pins 6 and 7. A 50K ohm
- shunt will increase the sensitivity by approximately 3.5dB; a short
- will increase the sensitivity by approximately 7 dB.
-
- DATA 0 (Data Outputs) Output, pins 14 thru 25. The data output
- thru states of all 16 digits for any possible condition
- DATA of FCA and FCB are shown in figure 2. Logic state 1 and logic state
- 0 are defined in the Performance Characteristics under Output
- Specifications.
-
- INSTALLATION DATA
- Refer to figure 7 for maximum dimensions. Figure 8 displays the
- required PC component side layout and the relation to the assembly.
-
-
-
-
- VALID TONE PAIR
- ---------------
-
- |<------ 40 ms MIN ------>|<------ 40 ms MIN ------>|
-
- |-------------------------| |------------
- --+XXXXXXXXXXXXXXXXXXXXXXXXX+-------------------------+XXXXXXXXXXXX
- |-------------------------| |------------
-
-
- BD (BUTTON DOWN)
- ----------------
-
- |<-- 16 ms -->| |<-- 25 - 34 ms -->|
- ________________________ _______
- ________________| |___________________|
-
-
- OUTPUT DATA
- -----------
-
- |<------ 35 ms ------>|
- -------------------------------\ /--------------------------------\ /-
- XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX><XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX><XXX
- -------------------------------/ \--------------------------------/ \-
- --->||<--- 10 µs
-
-
- GUDTA (STROBE)
- --------------
-
- _____________ __
- __________________________| |____________________________|
-
-
- FIGURE 5 DTMF DIGIT TIMING CHART
-
-
-
-
-
-
- LOOP CURRENT
- ------------
-
- |< 30 ms MIN >|
-
- ____ BREAK ______ ___________________________
- |_____________| MAKE |_____________|
-
- --->| 12 ms|<---
- MIN
-
- RD (ROTARY DIAL)
- ----------------
- |<--- 100 ms --->|
- ___________________________________________________
- ____| : |_________
- : END OF DIGIT ^
- :
- OUTPUT DATA :
- ----------- :
- :
- -------------------------------------------------------\ /------
- XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX><XXXXXXX
- -------------------------------------------------------/ \------
- : --->||<-- 10 µs
- :
- :
- :
- GUDTA (STROBE) :
- -------------- :
- : ______________
- ________________________________________________________| |_
- : |
- : <-- 200 ms -->|
- : |
- : INTERDIGITAL BLANKING|
- : |
- |<------------ 300 ms --------->|
-
- FIGURE 6 ROTARY DIAL TIMING CHART
-
-
-
-
- PERFORMENCE CHARACTERISTICS
- ---------------------------
-
- Input Specifications
-
-
- A. DTMF Input Signal Requirements
-
- Input Impedance 150K ohms Bridging
- Signal Accept Level 0.055 to 1.55 Vrms
- (per frequency) (-23 to +6 dBm)
- Signal Accept Level 0.025 to 1.09 Vrms
- (extended range) (-30 to +3 dBm)
- Signal Reject Level 0.017 Vrms
- (-33 dBm)
- Signal Reject Level 0.008 Vrms
- (extended range) (-40 dBm)
- Signal Accepted Duration > 40 ms
- Signal Reject Duration < 25 ms
- Interdigital Pause
- Accept Duration > 35 ms
- Interdigital Pause
- Reject Duration < 25 ms
- Signal Cycle Time > 80 ms
- Tone Accept Bandwidth = (1.5% - 2 Hz)
- Tone Reject Bandwidth = 3.5%
- Twist +6 -8 dB
- Precise Dial Tone Level <0.195 Vrms
- (per tone) (-12 dBm)
- Noise Ratio
- (flat weighted) > 20 dB
-
- B. DC Input Timing Requirements
-
- Off-hook Recognition 100 = 5 ms
- Off-hook Blanking 300 = 10 ms
- Dial Pulse Break
- Recognition 27 = 2.5 ms
- Dial Pulse Make
- Recognition 9 = 2.0 ms
- End of Digit
- Recognition 100 = 5 ms
- Interdigital Blanking 200 = 8 ms
- On-hook Recognition 300 = 10 ms
-
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-
- Some greetings to some more or less good friends of me :
- (in caotic order!)
-
- NOSTROMO - HAWK - RASTAMAN - IRAKIS - THORSTEN - DISQ BLUE - ZAPHORD -
- PERFECTION - RICHARD23 - RHYS CYBER - REMO - SPLAFFES - BEZERC - JAZY -
- SKYWALKER - ANDY and somebody else ....
-
-
- STRAIGHT of ··· PiNk NoIsE ···
-