Telephonic communications – Supervisory or control line signaling – Signal reception at substation
Reexamination Certificate
1998-12-30
2001-08-21
Matar, Ahmad F. (Department: 2742)
Telephonic communications
Supervisory or control line signaling
Signal reception at substation
C379S377000, C379S383000
Reexamination Certificate
active
06278778
ABSTRACT:
TECHNICAL FIELD OF THE INVENTION
This invention is related in general to the field of telecommunications equipment. More particularly, the invention is related to a system and method of power limiting call processing in telecommunications equipment.
BACKGROUND OF THE INVENTION
The Internet and the proliferation of many forms of customer premises equipment have prompted increasing demand for subscriber connections to the telecommunications network. Existing copper cabling carrying a single voice or data channel have traditionally been used to connect subscribers to the central office. Because the expense associated with placing additional copper cabling from the central office to the subscribers is prohibitive, a solution to provide additional subscriber connections with existing copper cabling is the pair gain equipment. The pair gain equipment enables the same copper cabling or twisted pair to carry multiple channels of telecommunications traffic signals to multiple subscriber lines from the central office.
Related technical references includes Bellcore GR-303-CORE, Generic Requirements for Integrated Digital Loop Carrier System, Issue Sep. 1, 1995; TR-NWT-000057
, Functional Criteria for Digital Loop Carrier Systems
, Issue Jan. 2, 1993; TR-TSY-000008, Digital Interface Between SLC 96 Digital Loop Carrier and a Local Digital Switch, Issue Aug. 2, 1987, Revision Sep. 1, 1993; and ANSI T1.401, Interface Between Carriers and Customer Installations Analog Voicegrade Switched Access Lines Using Loop-Start and Ground-Start Signalling, 1988. These references are incorporated herein by reference.
SUMMARY OF THE INVENTION
Accordingly, there is a need for pair gain equipment that enables adding subscriber lines without the additional expenses of placing copper cabling. Such pair gain equipment may take advantage of existing copper cabling to obtain supply power from a remotely located network power supply. In such a configuration, the number of twisted pairs devoted to supply remote power must be balanced with the number of twisted pairs devoted to carrying voice, video and data signals in order to provide the maximum number of subscriber lines. Accordingly, power consumption must be balanced with the amount of power that can be delivered on the fixed number of twisted pairs to the access multiplexing terminal.
In one aspect of the invention, a method of power limiting call processing in a telecommunications equipment coupled between a plurality of far end subscriber lines and a plurality of near end subscriber lines includes monitoring and determining a number of ringing subscriber lines, comparing the number of ringing subscriber lines to a predetermined ringing threshold, blocking further ringing on subscriber lines in response to the number of ringing subscriber lines reaching or exceeding the predetermined ringing threshold, and providing a reorder signal to a blocked ringing far end subscriber line.
In another aspect of the invention, an access multiplexing terminal coupled between a central office and a plurality of subscribers includes a first plurality of line cards coupled to a plurality of subscriber lines, a second plurality of line cards, a first plurality of twisted pairs coupling the second plurality of line cards to the central office, a second plurality of twisted pairs coupling the access multiplexing terminal to a network power supply, and a bandwidth allocator monitoring a number of ringing subscriber lines and a number of off-hook subscriber lines, the bandwidth allocator blocking further ringing and off-hook subscriber lines in response to the numbers thereof exceeding predetermined ringing and off-hook thresholds.
In yet another aspect of the invention, a system and method of limiting power consumption in a telecommunications equipment coupled between a plurality of far end subscriber lines and a plurality of near end subscriber lines are provided. The method includes monitoring and determining a number of ringing subscriber lines, comparing the number of ringing subscriber lines to a predetermined ringing threshold, monitoring and determining a number of off-hook subscriber lines, comparing the number of off-hook subscriber lines to a predetermined off-hook threshold, and blocking further ringing and/or off-hook subscriber lines in response to the number of ringing and/or off-hook subscriber lines reaching or exceeding the respective predetermined ringing and off-hook thresholds.
REFERENCES:
patent: 4593272 (1986-06-01), Berkowitz
patent: 5894508 (1999-04-01), Kim
patent: 5956393 (1999-09-01), Tessler et al.
patent: 6041108 (2000-03-01), Brewster et al.
patent: 44 20 430 C1 (1995-10-01), None
patent: 0 452 286 A1 (1991-10-01), None
patent: 0 643 524 A1 (1995-03-01), None
“Electronic Switching Studies in Telecommunications”, NL, Amsterdam, Elseier Science Publication, vol. 2, 1981, pp. 413-415, XP002130357.
Abdollahi Amir
Miller Brian L.
Alcatel USA Sourcing L.P.
Baker & Botts L.L.P.
Bui Bing
Matar Ahmad F.
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