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| | Multi-modem implementation with host based and digital signal processor based modems - US Patent 6708235 |
 | | The signalling portion of telephone signals is handled in the DAA and control lines between the DAA and the general purpose input/outputs 175 are used to passing ringing information to the DSP and receive control signals from the DSP. | | | In the first figure, the error signal is calculated at the output of noise whiterning filter, while in the second figure, the error is computed at the equalizer output. | | | If we compute the error signals based on the final decision, the errors will have a long delay, and we have to use the delayed least mean square LMS algorithm to update all the adaptation loops. |
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http://www.patentstorm.us/patents/6708235.html
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| | Media Watch » Telephony |
| | Between 9am and 9:10am, I redialed repeatedly and never got an answer or busy signal, just a ringing line. | | | "All representatives are busy." I know that might mean just one person, but no one was answering 60 seconds earlier, so how could they "all" be busy? | | | After a few minutes on hold, the system automatically transfered me to a voice mailbox. |
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http://www.dukecityfix.com/media.php?itemid=372&catid=31
(575 words)
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| | Ringing signal generator - Patent 4584576 |
| | The ringing signal generator comprises a plurality of cascade-arranged elements and in the first place a digital signal generator 7 which is controlled by the control signal CA generated by the central unit 6, to supply at its output terminal 8 a digital signal corresponding either to the ringing signal or to a zero signal. | | | A ringing signal generator as claimed in claim 3 wherein said third digital signals produced by the said digital signal generator are encoded in compressed PCM so as to obtain a high dynamic level of the output of the ringing signal generator. | | | The invention relates to a d.c.-fed ringing signal generator which is intended to produce the ringing signal for a group of subscriber lines, in a telephone exchange or in telephone subscriber sub-exchanges to feed the ringing signal to telephone lines, from a direct current source. |
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http://www.freepatentsonline.com/4584576.html
(2206 words)
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| | Integrated ringing circuit and a ring trip circuit for the same - Patent 4827503 |
| | The ringing circuit includes a first constant current source 10, a second constant current source 11 and a control circuit 12 which sends the ringing signal to the subscriber telephone set 1 by alternately operating the first and second constant current sources 10 and 11 using the signal from the reference signal source 15. | | | The circuit further includes a reference signal source which outputs a clock signal at the ringing signal frequency, and a control circuit for alternately activating the first and second constant current sources corresponding to the signal from the reference signal source, and for transmitting the ringing signal to the subscriber telephone set. | | | The R (ringing) function is accomplished by the ringing signal oscillator 5 and the contacts r1 and r2 of a relay (not shown). |
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http://www.freepatentsonline.com/4827503.html
(10111 words)
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| | Telephone ringing generators - Patent 4015091 |
| | Ringing signals are generated from this high DC voltage by interrupting the voltage at a 20 Hz rate and interrupting the 20 Hz signal during the silent intervals of the ringing cycle. | | | The signal can then be used at the remote terminal to both indicate the need for ringing and as a control signal to aid in the generation of the ringing signal. | | | In many ringing signal generators, a direct-current converter circuit is utilized to generate a high DC ringing voltage from a low voltage battery. |
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http://www.freepatentsonline.com/4015091.html
(6817 words)
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| | Circuit arrangement for the indication of loop closure during the ringing condition - Patent 4809258 |
| | This voltage signal is subjected to analog to digital conversion and filtering as for the speech signal at other times except that the high-pass filtering otherwise employed is avoided, and in that the resulting digital signal is further summed over at least one period of the ringing signal frequency. | | | The signal resulting therefrom is evaluated and causes the disconnection of the ringing signal voltage in a manner not shown. | | | For the indication of ringing, a proportional voltage has in the past been derived from the subscriber termination line current, from which the alternating component arising from the ringing signal was filtered out by a low-pass filter. |
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http://www.freepatentsonline.com/4809258.html
(1132 words)
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| | STMicroelectronics HIGHLY INTEGRATED SLIC KIT TARGETED TO PABX AND KEY SYSTEM APPLICATIONS - L3235N |
| | The ringing cycles are synchronised by the L3234 in such a way that the ringing starts and stops always when the analog input signal crosses zero. | | | The AC ringing signal amplitude is up to 60Vrms, and for that purpose a positive supply voltage of +100V shall be available on the subscriber card. | | | Its function is to amplify and inject in balanced mode with zero crossing the ringing signal. |
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http://www.st.com/stonline/books/ascii/docs/8425.htm
(3167 words)
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| | Telephone ringing circuits |
| | The electronic ringing circuits are not sensitive to the ringing voltage and they easily ring with ring signal frequencies between 16 Hz and 60 Hz. | | | Ring detector must not detect ring signal which is 44-58V DC summed with 20-3400 Hz AC ring signal which is less than 10 V. The feeding resistance for ring generator is 800-1710 Hz. | | | Ring detector must work on ring signal which is 44-58V DC summed with 25+-3Hz AC ring signal in voltage range 35-75 V. The feeding resistance for ring generator is 800-1710 Hz. |
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http://www.epanorama.net/circuits/telephone_ringer.html
(3304 words)
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| | [Mgcp] Ring tone info |
| | The ringing signal may be parameterized with the signal parameter "rep" which specifies the maximum number of ringing cycles (repetitions) to apply. | | | The following will apply the ringing signal for up to 6 ringing cycles: S: l/rg(rep=6) If the "rep" parameter is specified, the signal times-out when the number of repetitions are completed (i.e. | | | The next version of the basic packages draft, will allow the ringing tone in the line package to be parameterized with the number of ring cycles: Ringing (rg): See GR-506-CORE [5], Section 14. |
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http://www.vovida.org/pipermail/mgcp/2001-June/000656.html
(431 words)
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| | Gordon Kapes, Inc. -- Model 265 Overview |
| | When a ringing signal appears on the UNA trunk, the audio signal produced by the Model 265 is heard over the public address system. | | | The Model 265 produces a line-level audio signal and a relay contact closure in response to a standard telephone line ringing signal. | | | No external power source is required, the Model 265 is powered by the telephone line ringing signal. |
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http://www.gkinc.com/Overview265.htm
(431 words)
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| | 155 Ringing Signal |
| | The 155 Ringing Signal has the following standard features: white or cream colored base (which houses the ringing bell) and black strips, black plastic post, black crossbuck with white lettering and two flashing red signal lights. | | | It is based upon the popular 154 Highway Signal -- but with the addition of a ringing bell in in the based. | | | The 155 Ringing Signal was a brand new accessory for Lionel in 1955. |
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http://www.postwarlionel.com/cgi-bin/postwar?ITEM=155
(297 words)
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| | The RS232 Standard |
| | This signal is relevant when the DCE device is a modem, and is asserted (logic '0', positive voltage) when a ringing signal is being received from the telephone line. | | | The assertion time of this signal will approximately equal the duration of the ring signal, and it will be deasserted between rings or when no ringing is present. | | | Signal State Voltage Assignments - Voltages of -3v to -25v with respect to signal ground (pin 7) are considered logic '1' (the marking condition), whereas voltages of +3v to +25v are considered logic '0' (the spacing condition). |
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http://www.camiresearch.com/Data_Com_Basics/RS232_standard.html
(5380 words)
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| | Method and apparatus for prepayment of telecommunication connections in a telecommunication switching network - Patent 5265155 |
| | Telecommunication metering device 7" also includes a ringing signal detection circuit 66, which detects the presence of a ringing signal generated on lines 4 and 60 by the central switching station in response to a second telecommunication attempting to call the first telecommunication device. | | | Again, since telecommunication switch 27 is in the open-circuit condition at the time of dial-tone generation, it is necessary to detect the dial-tone on the line-in side of switch 27 and to generate a corresponding dial tone signal on the line-in side of switch. | | | The telecommunication device of claim 8, wherein said telecommunication device further comprises rate-disabling signal generation means in said housing for generating a rate-disabling signal for use in disabling the utilization of rates in said billing system with respect to said telecommunication connection. |
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http://www.freepatentsonline.com/5265155.html
(17393 words)
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| | Patent 5265155: Method and apparatus for prepayment of telecommunication connections in a telecommunication switching network |
| | Telecommunication metering device 7" also includes a ringing signal detection circuit 66, which detects the presence of a ringing signal generated on lines 4 and 60 by the central switching station in response to a second telecommunication attempting to call the first telecommunication device. | | | Again, since telecommunication switch 27 is in the open-circuit condition at the time of dial-tone generation, it is necessary to detect the dial-tone on the line-in side of switch 27 and to generate a corresponding dial tone signal on the line-in side of switch. | | | The telecommunication device of claim 8, wherein said telecommunication device further comprises rate-disabling signal generation means in said housing for generating a rate-disabling signal for use in disabling the utilization of rates in said billing system with respect to said telecommunication connection. |
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http://www.freepatentsonline.com/5265155.html
(17393 words)
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| | definition of curfew |
| | The ringing of an evening bell, originally a signal to the inhabitants to cover fires, extinguish lights, and retire to rest, -- instituted by William the Conqueror; also, the bell itself. | | | Bell, Cover, Fire, Rest, Ringing, Signal, To, William | | | Also, An, And, Bell, By, Conqueror, Cover, Covering, Evening, Extinguish, Fire, Fires, For, Inhabitants, Instituted, Itself, Lights, Of, Originally, Rest, Retire, Ringing, Signal, The, To, Utensil |
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http://www.brainydictionary.com/words/cu/curfew150462.html
(122 words)
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| | Ringing signal - Wikipedia, the free encyclopedia |
| | Caller ID signals are sent during the silent interval between the first and second bursts of the ringing signals. | | | A ringing signal is a telephony signal that tells the user that there is an incoming call. | | | Ringing is said to be "tripped" when the impedance of the line reduces to about 600 ohms when the telephone handset is lifted off the switch-hook. |
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http://en.wikipedia.org/wiki/Ringing_signal
(315 words)
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| | Block size determination and adaptation method for audio transform coding - US Patent 6424936 |
| | The block sizes available for the transform coding must in the first place be selected such that if a signal attack were to be detected, a short block transform could be used to process the attack signal and will not give rise to ringing or noise signal to the adjacent blocks. | | | It is known that, in transform coding, a pre-echo or a noise/ringing effect in the silent period before a sudden increase of signal magnitude, or an attack, can occur, particularly if transform coding block size for the audio frame containing the attack is long. | | | In a hybrid subband and transform coder such as the ATRAC algorithm, the input audio samples, sampled at 44.1 kHz, i.e., 44100 samples generated per second, are subjected to a hybrid subband and transform coding. |
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http://www.patentstorm.us/patents/6424936.html
(4123 words)
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| | Key telephone system - Patent 4092501 |
| | In the tone generator 132, the dial tone, the ring back tone, the ringing signal and the busy signal are generated by the control signal transmitted from the intercomm. | | | As is apparent from the foregoing, in cases where various calling tones are radiated from the speaker of the key telephone set in the key telephone apparatus, use is made of two calling tone signal lines: one for the transmission of the tone ringer signal and the intercomm. | | | The ringing tone control circuit 70 is provided with a control circuit for controlling the switching of the intercomm. |
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http://www.freepatentsonline.com/4092501.html
(5108 words)
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| | Mini Glossary for NII Users |
| | audible ringing tone: In telephony, a signal, usually consisting of an audio tone interrupted at a slow repetition rate, provided to a caller to indicate that the called-party instrument is being sent a ringing signal. | | | When the phase of the chroma signal corresponds to the preprogrammed state or states associated with the background color, or range of colors, behind the principal subject, the signal from the alternate, i.e., false, background is inserted in the composite signal and presented at the output. | | | When the phase of the chroma signal deviates from that associated with the background color(s) behind the principal subject, video associated with the principal subject is presented at the output. |
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http://www.its.bldrdoc.gov/projects/nii/nii-glos.html
(7087 words)
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| | Patent 4626782: Magnetometer operated at a self-resonant frequency by a sense winding |
| | This signal produces the ringing of the sense winding at its self-resonant frequency when the amplifier loop gain is greater than one and in phase with the resonant frequency. | | | The signal to noise level is reduced by using the sense winding ringing frequency as the operational frequency of the magnetometer. | | | The noise produced by the ringing frequency is essentially eliminated by the use of the ringing frequency as the frequency of operation. |
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http://www.freepatentsonline.com/4626782.html
(7087 words)
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| | Audible ringing tone - Wikipedia, the free encyclopedia |
| | It is generally started and stopped at the same rate as the ringing signal itself but perhaps out of phase. | | | Audible ringing tone: In telephony, a signal, usually consisting of an audio tone interrupted at a slow repetition rate, provided to a caller to indicate that the called-party instrument is being sent a ringing signal. | | | Note: The audible ringing tone may be generated by the called-party servicing switch or by the calling-party servicing switch, but it is not generated by the called telephone instrument. |
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http://en.wikipedia.org/wiki/Audible_ringing_tone
(126 words)
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| | Telephone ringing circuits |
| | In computer modems the logical signal from ringing is needed instead of ringing tone. | | | Ringing tone is the ringing that can be heard while the receiver is on-hook and somebody tries to call you. | | | Ring detector must not detect ring signal which is 44-58V DC summed with 20-3400 Hz AC ring signal which is less than 10 V. The feeding resistance for ring generator is 800-1710 Hz. |
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http://www.hut.fi/Misc/Electronics/circuits/telephone_ringer.html
(126 words)
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| | Product Folder : UCC3751 - Single Line Ring Generator Controller |
| | For normal ring signal generation, the primary switching frequency and secondary sampling frequency are precisely offset from each other by the ringing frequency to produce a high voltage low frequency alias signal at the output. | | | In addition to providing the sinusoidal ringing signal, the controller and the power stage are designed to provide the required DC voltage across the output when the phone goes off-hook. | | | The DC voltage is also added as the offset to the ringing signal. |
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http://focus.ti.com/docs/prod/folders/print/ucc3751.html
(570 words)
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| | Ringback signal - Wikipedia, the free encyclopedia |
| | In telephony, a ringback signal, usually consisting of an audio tone interrupted at a slow rate, provided to a caller to indicate that the called-party instrument is receiving a ringing signal. | | | A ringing signal returned to a caller to indicate that one of the types of delayed automatic calling is now ringing the called party. | | | This signal may be generated by the called-party servicing switch or by the calling-party switch. |
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http://en.wikipedia.org/wiki/Ringback_signal
(104 words)
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| | Church bell ringing to signal start of parade mountvernonnews.com |
| | Published: Friday, July 15, 2005 09:10 AM — Downtown Mount Vernon area churches and WNZR 90.9 FM, a broadcast ministry of Mount Vernon Nazarene University, are teaming up Saturday with an official bell ringing to signal the start of Mount Vernon’s Bicentennial Parade. | | | Church bell ringing to signal start of parade | | | Church bell ringing to signal start of parade |
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http://www.mountvernonnews.com/local/071505/bells.html
(147 words)
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| | Definition: ringback signal |
| | In telephony, a signal, usually consisting of an audio tone interrupted at a slow rate, provided to a caller to indicate that the called-party instrument is receiving a ringing signal. | | | A ringing signal returned to a caller to indicate that one of the types of delayed automatic calling is now ringing the called party. | | | Note: This signal may be generated by the called-party servicing switch or by the calling-party switch. |
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http://www.atis.org/tg2k/_ringback_signal.html
(87 words)
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| | Personal Silent Alert System -- Overview |
| | Figure 2.2 shows the signals on a silent and a ringing telephone line. | | | Using this approach the frequency of the ringing signal does not play a role in detecting a ring signal. | | | All telephone standards have one property in common: The peak voltage of a ringing line is significantly higher than the DC voltage for a silent line or a line in use. |
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http://www.ee.washington.edu/conselec/A96/projects/Deaf/overview.html
(1378 words)
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| | Telephone ringing circuits |
| | The electronic ringing circuits are not sensitive to the ringing voltage and they easily ring with ring signal frequencies between 16 Hz and 60 Hz. | | | Ring detector must not detect ring signal which is 44-58V DC summed with 20-3400 Hz AC ring signal which is less than 10 V. The feeding resistance for ring generator is 800-1710 Hz. | | | Another apprach for ring detecting is to use a full wave rectifier circuit to convert the AC sign signal to the DC suitable for optoisolator and then put current limiting resistor and zener diode to the rectifier output. |
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http://www.tkk.fi/Misc/Electronics/circuits/telephone_ringer.html
(3105 words)
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| | Method and apparatus for displaying at a selected station special service information during a silent interval between ringing - Patent 4582956 |
| | In addition to transmitting the ringing signals, the telephone switching office is capable of sending to the selected station an unmodulated signal and by a modulated signal during the silent interval between ringing signals. | | | During time interval 206, a single frequency unmodulated FSK signal is received on the tip and ring leads of the station set to initialize the data receiver. | | | Reference to this related application is made for a better understanding of the transmission of the data message during the silent interval between ringing. |
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http://www.freepatentsonline.com/4582956.html
(5073 words)
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| | United States Patent: 6,552,564 |
| | In order to control the resistance R of the interconnection line 6 to insure a signal at the end of the interconnection line, node N3, with minimized ringing and reflections with minimal delay the geometry of the line must be altered based upon the line resistivity. | | | Clock signal delay or skew, caused by the characteristics of the distribution line, is an important factor in the transmission of clock signals and for this reason many interconnection or distribution lines attempt to minimize resistivity. | | | A signal generated by signal source 5 is transmitted along the long interconnection line 6, from node N2 to node N3, and ultimately to a destination point D1. |
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http://web.engr.oregonstate.edu/~flf/6552564.html
(2701 words)
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