ES2013429A6 - Digital network telephone adapter - Google Patents

Digital network telephone adapter

Info

Publication number
ES2013429A6
ES2013429A6 ES8901252A ES8901252A ES2013429A6 ES 2013429 A6 ES2013429 A6 ES 2013429A6 ES 8901252 A ES8901252 A ES 8901252A ES 8901252 A ES8901252 A ES 8901252A ES 2013429 A6 ES2013429 A6 ES 2013429A6
Authority
ES
Spain
Prior art keywords
digital network
circuit
adapter
network telephone
implements
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
ES8901252A
Other languages
Spanish (es)
Inventor
Ortega Angel Hermosilla
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefonica SA
Original Assignee
Telefonica de Espana SA
Telefonica Nacional de Espana SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telefonica de Espana SA, Telefonica Nacional de Espana SA filed Critical Telefonica de Espana SA
Priority to ES8901252A priority Critical patent/ES2013429A6/en
Publication of ES2013429A6 publication Critical patent/ES2013429A6/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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  • Interface Circuits In Exchanges (AREA)

Abstract

The digital network telephone adapter is based on the use of a microprocessor which implements all the levels of the basic access interface of the user, together with control of the peripheral elements of the adapter, having a module of circuits which comprises a specific circuit for the basic interface of the user which implements the physical level of the connection to the digital network and a circuit which carries out functions of hybridising and feeding the direct current loop. Equally the adapter comprises an encoding-decoding circuit which transforms the analogue signal of the law digital line A and vice versa having a detector circuit of multifrequency tones, there being a keyboard, a display, a non-volatile memory specific to the equipment with the object of effecting the operation of the whole assembly.
ES8901252A 1989-04-11 1989-04-11 Digital network telephone adapter Expired - Lifetime ES2013429A6 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES8901252A ES2013429A6 (en) 1989-04-11 1989-04-11 Digital network telephone adapter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES8901252A ES2013429A6 (en) 1989-04-11 1989-04-11 Digital network telephone adapter

Publications (1)

Publication Number Publication Date
ES2013429A6 true ES2013429A6 (en) 1990-05-01

Family

ID=8261399

Family Applications (1)

Application Number Title Priority Date Filing Date
ES8901252A Expired - Lifetime ES2013429A6 (en) 1989-04-11 1989-04-11 Digital network telephone adapter

Country Status (1)

Country Link
ES (1) ES2013429A6 (en)

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 20020401