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Class Information
Number: 379/333
Name: Telephonic communications > Concentrator or trunk selector
Description: Subject matter for connecting a large number of subscriber lines to a smaller number of shared or trunk lines.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| RE40492 |
Power line telephony exchange |
Sep. 9, 2008 |
| 7248565 |
Arrangement for managing multiple gateway trunk groups for voice over IP networks |
Jul. 24, 2007 |
| 6894239 |
Flip-cover sensor for keypad |
May. 17, 2005 |
| 6891947 |
Multifunctional analog trunk circuit |
May. 10, 2005 |
| 6826274 |
Exchange control method |
Nov. 30, 2004 |
| 6823064 |
Enhanced terminal block for readily connecting customers to any of a plurality of telecommunications service providers |
Nov. 23, 2004 |
| 6810121 |
Common package |
Oct. 26, 2004 |
| 6788782 |
Method and apparatus for switching between multiple communication lines |
Sep. 7, 2004 |
| 6782097 |
Splitter device for MDU/MTU environments |
Aug. 24, 2004 |
| 6778662 |
Point card |
Aug. 17, 2004 |
| 6754730 |
Intelligent apparatus for sharing a user I/O interface among all intelligent modules thereof |
Jun. 22, 2004 |
| 6697893 |
Line concentrator with storage function |
Feb. 24, 2004 |
| 6668058 |
Power line telephony exchange |
Dec. 23, 2003 |
| 6577728 |
Method of providing continual network access for subscriber communication lines |
Jun. 10, 2003 |
| 6567518 |
Method of field programmable gate array configuration |
May. 20, 2003 |
| 6542599 |
Subscriber system transmission apparatus with line concentrating capability |
Apr. 1, 2003 |
| 6519337 |
Method for searching trunks in telecommunication N/Ws |
Feb. 11, 2003 |
| 6466665 |
Method for concentrating subscribers in a local exchange |
Oct. 15, 2002 |
| 6418219 |
Method and device in telecommunications networks |
Jul. 9, 2002 |
| 6330329 |
Method and apparatus within a switch for performing circular hunts with a window |
Dec. 11, 2001 |
| 6272217 |
Routing call processing communications in a telecommunications system |
Aug. 7, 2001 |
| 6160880 |
Local number portability service saver |
Dec. 12, 2000 |
| 6154536 |
Order wire accommodation system for interoffice communications |
Nov. 28, 2000 |
| 6047061 |
Routing call processing communications in a telecommunications system |
Apr. 4, 2000 |
| 6031906 |
Digital loop carrier system with automatic reprovisioning of dedicated lines |
Feb. 29, 2000 |
| 5995618 |
Method for redirecting traffic on a communications network for conservation of network resources |
Nov. 30, 1999 |
| 5764754 |
Subscriber loop reconnection device and method |
Jun. 9, 1998 |
| 5568545 |
Centralized command system for a telecommunications network |
Oct. 22, 1996 |
| 5533114 |
Telecommunication system comprising subscriber connection units having independent routing ability |
Jul. 2, 1996 |
| 5457741 |
Subscriber transmission system |
Oct. 10, 1995 |
| 5455824 |
Message information terminating system |
Oct. 3, 1995 |
| 5347566 |
Retrofit subscriber loop carrier system with improved performance monitoring and remote provisioning |
Sep. 13, 1994 |
| 4924457 |
Concentrator system with polling-response means for detecting failures to stop tariff charges on locally established intraoffice calls |
May. 8, 1990 |
| 4837810 |
Telephone switch center with control of individual devices |
Jun. 6, 1989 |
| 4754480 |
Circuit arrangement for telecommunication switching systems connected to line concentrator sub-exchanges by connecting channels |
Jun. 28, 1988 |
| 4689783 |
Digital satellite exchange |
Aug. 25, 1987 |
| 4622438 |
Subscriber line radio concentration system with automatic response for a loop back test |
Nov. 11, 1986 |
| 4571721 |
Composite concentration system |
Feb. 18, 1986 |
| 4535203 |
Bridge rectifier circuit |
Aug. 13, 1985 |
| 4533914 |
Remotely controlled crossconnection system |
Aug. 6, 1985 |
| 4472801 |
Distributed prioritized concentrator |
Sep. 18, 1984 |
| 4451703 |
All electronic interface for telephony system |
May. 29, 1984 |
| 4437096 |
Concentrator circuit incorporating solid state bilateral bridge arrangement |
Mar. 13, 1984 |
| 4112260 |
AC type line concentrator |
Sep. 5, 1978 |
| 4007339 |
Arrangement serving operator assistance calls requiring routing back to originating offices |
Feb. 8, 1977 |
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