Brady Barnes - Chandler AZ Lloyd Tarr - Fountain Hills AZ Curtis J. Behun - Phoenix AZ
Assignee:
Inter-Tel, Inc. - Tempe AZ
International Classification:
H04B 138
US Classification:
370286, 370290, 375222
Abstract:
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 digital PBX and a two-to-four wire hybrid converter coupled with the two-wire analog telephone trunk. The combination of the echo canceller and the linear codec allows accurate decoding of weak far end modem signals when such signals are summed with a strong near end modem signal echo. The DSP echo canceller removes the very strong near end modem echo and passes the far end modem signal with little distortion, while the linear codec permits accurate recovery of the weak far end signal in the presence of high noise levels.
Inter-Tel
Retired Director of Hardware Design
Inter-Tel Integrated Systems 1994 - 2006
Director Hardware Design
Siemens 1987 - Sep 1993
Manager
Gte 1967 - 1987
Manager
Education:
University of New Mexico 1992 - 1992
Bradley University 1963 - 1967
Bachelors, Bachelor of Science In Electrical Engineering, Communications, Engineering, Electronics
Skills:
Telecommunications Telephony Hardware Integration Wireless Web Services Hardware Architecture Voip Unified Communications Product Management Ip Ethernet Mobile Devices Testing Tcp/Ip Cloud Computing Debugging Embedded Systems Data Center Software Engineering Software Development System Architecture Managed Services Mpls Sip
Name / Title
Company / Classification
Phones & Addresses
Lloyd Tarr Director Hardware Design
Mitel, Inc. Electronic Parts and Equipment
7300 W Boston St, Chandler, AZ 85226
Lloyd Tarr Director Hardware Design
MITEL NETWORKS, INC Sale Of Telecommunication Equipment · Whol Electronic Parts/Equipment · Electrical Work
1146 N Alma School Rd, Mesa, AZ 85201 1016 W Geneva Drive , Tempe, AZ 85282 400-2711 Centerville Road , Santa Fe, NM 87501 1146 N Alma School Road , Mesa, AZ 85201 4809619000, 4809616921
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