| Patent Number |
Title Of Patent |
Date Issued |
| D569865 |
Voice over internet protocol device |
May 27, 2008 |
|
| D541264 |
PBX communication system |
April 24, 2007 |
|
| D529892 |
Hybrid voice communication system |
October 10, 2006 |
|
| D499724 |
Telephone handset |
December 14, 2004 |
|
| D489049 |
Telephone |
April 27, 2004 |
|
| D483750 |
Telephone dialing accessory |
December 16, 2003 |
|
| D483749 |
Telephone dialing accessory |
December 16, 2003 |
|
| D482342 |
Telephone |
November 18, 2003 |
|
| D479517 |
Telephone |
September 9, 2003 |
|
| D476969 |
Telephone |
July 8, 2003 |
|
| D470830 |
Telephone |
February 25, 2003 |
|
| 7398215 |
Prompt language translation for a telecommunications system |
July 8, 2008 |
| A prompt translation application for use in a telecommunications messaging system provides an administrator with a plurality of messaging prompts in a base language for revising, translating, and editing. The administrator can nearly simultaneously revise both a visual component of a pro |
| 7133465 |
Modified Tomlinson-Harashima precoding method circuit for infinite impulse response (IIR) channe |
November 7, 2006 |
| A precoding circuit for minimizing distortion of an input signal in a communication channel having a compound transfer function in the Z-Domain: H(z)=(1+a.sub.1.z.sup.-1+a.sub.2.z.sup.-2+a.sub.3.z.sup.31 3+ . . . +a.sub.n.z.sup.-n)/(1+b.sub.1.z.sup.-+b.sub.2.z.sup.-2+b.sub.-3.z.sup- . |
| 7031443 |
System and method for remote access to a telephone |
April 18, 2006 |
| An improved system and method for remote access from a variety of remote clients to an office telephone is provided. In the preferred embodiment, access to an office information center is through the Internet using a web-compliant remote client. The office information center includes a w |
| 6999431 |
Voice over internet protocol |
February 14, 2006 |
| A voice over Internet protocol (VOIP) directory service for communications users of an enterprise locates a telephone or work station of a called party for the purpose of setting up real-time communication, either from a pulse code modulation (PCM) telephone or from an Internet protocol |
| 6944215 |
Method and apparatus for transmitting data from an analogue modem to a digital modem through an |
September 13, 2005 |
| A method for transmitting data through an analogue channel from an analogue modem to a digital modem includes encoding data inputted to the analogue modem. An encoder encodes data inputted into the analogue modem into corresponding constellation points of a one-dimensional constellation. |
| 6829249 |
Voice-over internet protocol |
December 7, 2004 |
| A system and method is designed for upgrading a digital PBX used with a pulse code modulation (PCM) telephone system by providing an interface card connected to the back plane of the PBX. The interface card acts as a replacement for the digital key set cards normally used with the back |
| 6798874 |
System and method for enabling custom telephone features on a PBX system |
September 28, 2004 |
| A telephone system and method is provided including a processing system, such as a CTI system, in communication with a PBX and one or more telephone sets. The user selects a pre-programmed canned message, such as a DND message or status-state, from a list of messages and may further |
| 6760427 |
Computer telephony (CT) network serving multiple telephone switches |
July 6, 2004 |
| An enhanced computer telephony (CT) network design for a private branch exchange (PBX) telephone system network improves the computer telephony interface (CTI) capabilities of the network. Bi-directional data from remote telephone switching nodes of different PBX systems, each using a |
| 6754187 |
Performance enhancement system for digital PBX |
June 22, 2004 |
| A system for ensuring optimum performance of a modem used in conjunction with a telephone system employing a digital PBX coupled with a two-wire analog trunk includes an echo cancellation circuit having an adaptive filter connected in series circuit with a linear codec between the digita |
| 6205206 |
Integrating a voice messaging function card over a public branch exchange (PBX) backplane |
March 20, 2001 |
| The voice mail system is embodied on a card (VxC) designed to be inserted into the PBX cabinet and communicate with the PBX processor via the backplane of the system. The VxC card includes a dual port RAM for providing two way communication between the VxC and the PBX. Through the al |
| 4306116 |
Communications unit for voice and data |
December 15, 1981 |
| A communications unit that allows alternate voice and digital data transmissions over a single telephone line. A communications unit, at each of two locations that connect through telephones, includes a trunk signal path that connects to a telephone line and a telephone signal path that |
| 4076961 |
Automatic switching unit for data communications network |
February 28, 1978 |
| An automatic switching unit for connection to a modem at a remote site in a data communications network. The switching unit normally connects the modem to a primary data transmission path. If the primary path malfunctions, a central site operator can telephone the remote site and est |
| 4055808 |
Data communications network testing system |
October 25, 1977 |
| A testing facility for a data communications network including modulators and demodulators, or modems, at central sites, at intermediate, or hubbing, sites, and at remote sites. Hubbing site testing units connect to respective host modems at the intermediate sites. The central testing un |
| 4055733 |
Line level signal measuring device |
October 25, 1977 |
| A device for measuring the power of analog signals on telephone lines in a data communications network. A selection circuit couples a selected analog signal from one of the telephone lines to a measuring circuit. A full-wave rectifier and a low pass filter process and convey the selected |
| 4037049 |
Modulator and demodulator for data communications network |
July 19, 1977 |
| A modem with transmitter and receiver sections. Incoming digital data signals produce successive coordinate signals to define successive transmission points representing a given digital value and to modulate quadrature carrier signals. The coordinate signals have unit values of 0, 1, |
| 3955141 |
Synchronizing circuit for modems in a data communications network |
May 4, 1976 |
| A modem with transmitter and reciever sections. Incoming digital data signals produce successive coordinate signals to define successive transmission points representing a given digital value and to modulate quadrature carrier signals. The coordinate signals have unit values of 0, 1, |
