A gateway for communicating telecommunication information between a telecommunication network and customer premises equipment, includes a telecommunication interface, a management module, compression modules, and packetization modules The telecommunication interface receives telecommunication information from the telecommunication network for communication to the customer premises equipment The management module determines a bandwidth available to communicate the telecommunication information to the customer premises equipment and selects a compression algorithm according to the available bandwidth The compression modules compress the telecommunication information using the selected compression altorithm, and the packetization modules generate data packets for communicating the telecommunication information

System and method for selecting a compression algorithm according to an available bandwidth

A voice gateway ( 64 ) includes an input port ( 70 ) that receives a voice signal from an unbundled analog line ( 62 ) coupled to a Class 5 switch ( 52 ). The voice signal is converted to a digital format by an analog-to-digital and digital-to-analog converting unit ( 76 ). The voice signal is placed into a compressed format by a compressing/de-compressing unit ( 80 ) using a selected one of a plurality of compression ratios. The voice signal is placed into a transport frame by a packetizing/de-packetizing unit ( 84 ) according to a selected packet format. The voice signal is multiplexed with other voice signals by an output port ( 88 ). The output port ( 88 ) places the voice signal onto a selected one of a plurality of output lines in order to transport the voice signal in its transport frame to one of an office customer premises ( 12 ) and a residence customer premises ( 14 ).

Method and apparatus for providing voice signals to and from a telecommunications switch

A method reliably communicates content for multiple subscriber lines via a single physical transmission medium between a telecommunication gateway and equipment at a customer location. In that method, content for two or more subscriber lines of the customer location is received and converted into packetized data for network communications and/or multiplexed to form an added-main-line (AML) signal that includes power. The packetized data or the AML signal is communicated between the customer location and the telecommunication gateway via the single physical transmission medium. External power can be used to extract the content for the two or more subscriber lines from the packetized data in a primary mode of operation, and the power from the AML signal can be used to extract the content for the two or more subscriber lines from the AML signal in a backup mode of operation.

System and method for reliably communicating telecommunication information

A telecommunications network (10) includes a gateway (18) that receives signaling information in a message based signaling format from a Class 5 softswitch (26). The gateway (18) also receives voice traffic over an inter-machine trunk from a public switched telephone network (12). The gateway (18) places the voice traffic into data packets. The gateway (18) transfers the data packets and the signaling information to an Internet Protocol network (30). The data packets and the signaling information may be transferred over a common physical link and over separate logical links.

System and method for interfacing signaling information and voice traffic

A network interface device includes a first interface, a power extractor, a transceiver, and a second interface. The first interface receives a signal that includes both power and packetized information. The power extractor extracts the power from the signal and powers the transceiver. The transceiver extracts the packetized information from the signal and communicates the information to a user device using the second interface.

Line-powered network interface device

A digital interface of an integrated subscriber line interface circuit is provided. The interface serves for the connection of a signal processor unit. Individual connections are used as signal inputs in signal entry operation of the interface, and as signal outputs in signal transmission operation. Other connections are used as signal inputs in both operating mode, but receive different signals in each operating mode. One group of connections includes two registers with respective associated decoders to enable switching from one to the other, so that the number of operating instructions that can be represented by means of binary signal value combinations applied to the connections is doubled.

Digital interface of an integrated subscriber line interface circuit

A circuit arrangement for suppressing interference signals on the receiving arm of a subscriber line circuit is constructed from electronic components and thus comprises no speech transformers. The receiving arm of the subscriber line circuit (SLIC) is connected to a two-pole filter circuit (ZF) which consists of the parallel arrangement of a parallel--and a series--resonance circuit (LP,CP and LS,CS), the resonance frequency of which corresponds to the frequency of the signals which are fed-in for the transmission of charge pulses and which charge pulses can manifest themselves as interference signals when reflected without the provision of the described measures.

Circuit arrangement for suppressing interference signals on the receiving arm of a telephone subscriber line circuit

Schaltungsanordnung zur Unterdruckung von Storsignalen auf dem Empfangszweig einer unter Verwendung von elektronischen Bauelementen aufgebauten und damit ohne Sprachubertrager realisierten Teilnehmeranschlusschaltung. A circuit arrangement for suppressing interference signals on the receiving branch of a constructed using electronic components and hence realized without speech transformers subscriber line circuit. Schaltungsanordnung zur Unterdruckung von Storsignalen auf dem Empfangszweig einer unter Verwendung von elektronischen Bauelementen aufgebauten und damit ohne Sprachubertrager realisierten Teilnehmeranschlusschaltung. A circuit arrangement for suppressing interference signals on the receiving branch of a constructed using electronic components and hence realized without speech transformers subscriber line circuit. An den Empfangszweig der Teilnehmeranschlusschaltung (SLIC) ist eine Zweipolfilterschaltung (ZF) angeschlossen, die aus der Parallelschaltung eines Parallel- und eines Serienresonanzkreises (LPCP und LSCS) besteht, deren Resonanzfrequenz der Frequenz der zur Gebruhrenimpulsubermittlung eingespeisten Signale entspricht, die ohne die genannten Masnahmen bei Reflexionen als Storsignale wirken konnen. At the receiving branch of the subscriber line interface circuit (SLIC) is connected a Zweipolfilterschaltung (ZF), which consists of the parallel connection of a parallel and a series resonant circuit (LPCP and LSCS), the resonance frequency of the frequency of the supplied to Gebruhrenimpulsubermittlung signals corresponds to that without the aforementioned measures reflections can act as interference.

Circuit for the suppression of perturbing signals on the reception branch line of a subscriber line circuit realized by electronic components without the use of a voice transformer

An apparatus for separating dc current and ac current signal portions of a composite signal. The apparatus has a main current path for carrying the composite signal. This path splits into a dc current path and into two dc blocked ac current paths. At the node a virtual ground potential for the ac current signal portions is generated with the aid of an inverting amplifier with negative feedback located in one of the ac current paths. Thus, only the dc current portions flow over the dc current path. In a preferred embodiment, the dc blocking is implemented by a capacitor in each ac current path, and the inverting amplifier is an operational amplifier, whose non-inverting input is at ground potential, whose inverting input is connected with the respective capacitor and whose output is connected both with the inverting input via an ohmic negative feedback resistor and with an impedance in the other ac current path.

Apparatus for separating dc current and ac current components of a composite signal

A digital interface between at least two subscriber line interface circuits and a processing unit is described. The interface is configured in the form of a parallel interface. The level of an input/output register and of a control register is allocated, as needed, to the connections of the processing unit. These connections can be operated selectively as inputs or outputs. They can also be operated in two modes, depending upon which type of subscriber line interface circuit (SLIC) is connected. The connections of the last-mentioned units are partially operable as inputs or outputs and partially operable only as inputs but in the input case, selectively for various types of input signals.

Stader Harald

Papers

Digital interface of an integrated subscriber line interface circuit

Circuit arrangement for suppressing interference signals on the receiving arm of a telephone subscriber line circuit

Circuit for the suppression of perturbing signals on the reception branch line of a subscriber line circuit realized by electronic components without the use of a voice transformer

Apparatus for separating dc current and ac current components of a composite signal

Digital interface between at least two subscriber line interface circuits and a processing unit