AR017381A1 - APPARATUS AND METHOD FOR SUPPORTING ANALOG FAX CALLS IN A TANDEM CONFIGURATION - Google Patents

APPARATUS AND METHOD FOR SUPPORTING ANALOG FAX CALLS IN A TANDEM CONFIGURATION

Info

Publication number
AR017381A1
AR017381A1 ARP980105275A AR017381A1 AR 017381 A1 AR017381 A1 AR 017381A1 AR P980105275 A ARP980105275 A AR P980105275A AR 017381 A1 AR017381 A1 AR 017381A1
Authority
AR
Argentina
Prior art keywords
base station
tandem configuration
message
communication
tandem
Prior art date
Application number
Other languages
Spanish (es)
Original Assignee
Qualcomm Inc
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
Priority claimed from US08/956,178 external-priority patent/US6115142A/en
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Publication of AR017381A1 publication Critical patent/AR017381A1/en

Links

Abstract

La presente invencion provee un aparato y método para soportar llamadas de fax analogicas entres dos estaciones subscriptoras inalámbricas en unaconfiguracion en tándem. La existencia de una configuracion en tándem es detectada, y un protocolo de comunicacion más eficiente es establecidoentre las dos estaciones base tras la deteccion de la configuracion en tándem. Un generador de mensajes en una primera estacion base genera un mensajede identificacion. Si el mensaje de identificacion es recibidopor una segunda estacion base, la segunda estacion base será informada que existe laconfiguracion en tándem. Un generador de mensajes en una segunda estacion base puede entonces generar un mensaje de contestacion, el cual cuando esrecibido por la primera estacion base, notificará a la primera estacion base de la existencia de una configuracion en tándem. Para soportar la configuracionen tándem, la comunicacion bidireccional (full duplex) puede ser establecida entre las dos estaciones base. La comunicacion bidireccional (full duplex)puede ser realizada por la incorporacion de un cancelador de eco en la estacion base, utilizando ambos canales BFSK del sistema V.21 para la comunicacion.La configuracion en tándem puede también ser soportada por la sincronizacion de bandera (flag) avanzada. De esta forma, después de que un mensaje estransmitido desde una primera estacion base hacia una segunda estacion base, la segunda estacion base comenzará inmediatamente a enviar banderas (flag) depreámbulo hacia la primera estacion base. La primera estacion base puede entonces sincronizar su receptor para la recepcion inmediata del mensajede contestacion desde la segunda estacion base.The present invention provides an apparatus and method for supporting analog fax calls between two wireless subscriber stations in a tandem configuration. The existence of a tandem configuration is detected, and a more efficient communication protocol is established between the two base stations after the detection of the tandem configuration. A message generator in a first base station generates an identification message. If the identification message is received by a second base station, the second base station will be informed that the tandem configuration exists. A message generator in a second base station can then generate a reply message, which when received by the first base station, will notify the first base station of the existence of a tandem configuration. To support the tandem configuration, two-way communication (full duplex) can be established between the two base stations. Bidirectional communication (full duplex) can be performed by incorporating an echo canceller in the base station, using both BFSK channels of the V.21 system for communication. Tandem configuration can also be supported by flag synchronization ( advanced flag). In this way, after a message broadcast from a first base station to a second base station, the second base station will immediately begin sending flags (preamble) to the first base station. The first base station can then synchronize its receiver for immediate reception of the reply message from the second base station.

ARP980105275 1997-10-22 1998-10-22 APPARATUS AND METHOD FOR SUPPORTING ANALOG FAX CALLS IN A TANDEM CONFIGURATION AR017381A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/956,178 US6115142A (en) 1997-08-04 1997-10-22 Method and apparatus for supporting analog fax calls in a tandem configuration

Publications (1)

Publication Number Publication Date
AR017381A1 true AR017381A1 (en) 2001-09-05

Family

ID=27789507

Family Applications (1)

Application Number Title Priority Date Filing Date
ARP980105275 AR017381A1 (en) 1997-10-22 1998-10-22 APPARATUS AND METHOD FOR SUPPORTING ANALOG FAX CALLS IN A TANDEM CONFIGURATION

Country Status (2)

Country Link
AR (1) AR017381A1 (en)
TW (1) TW515196B (en)

Also Published As

Publication number Publication date
TW515196B (en) 2002-12-21

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