Method and apparatus for testing of extended isdn bri service

H - Electricity – 04 – L

Patent

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Details

H04L 12/26 (2006.01) H04L 12/52 (2006.01) H04M 3/22 (2006.01) H04M 3/28 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 2178054

An enhanced ISDN-DP transmission device of the present invention allows for testing of ISDN-protocol communication paths using an existing DDS-protocol test infrastructure. The ISDN-DP unit receives a DDS test command and determines whether the command was intended for the immediate receiving unit or a tandem unit. If the command is intended for the immediate ISDN-DP unit, the unit processes the command. If the command is intended for another ISDN device in the transmission path, the ISDN-DP converts the DDS-protocol command to an ISDN-protocol command and transmits the converted ISDN command to an adjacent tandem ISDN device in the communication path in an upstream or downstream direction. After the test path is enabled, loopback testing is available on all available ISDN bandwidth, including the B1, B2 and D+ channels, from a DDS-protocol test set. DDS-protocol test access is available from a plurality of locations including: multiplexed bit stream access at a digital crossconnect switch; metallic access at a DS0 interface; faceplate access at the ISDN-DP unit.

Dispositif de transmission amélioré RNIS-DP permettant de tester des voies de transmission du protocole RNIS au moyen d'une infrastructure de test de protocole DDS. L'unité RNIS-DP reçoit une commande de test DDS et détermine si celle-ci est destinée à l'unité de réception immédiate ou à une unité de transit. Si la commande est destinée à l'unité RNIS-DP immédiate, l'unité traite la commande. Si elle est destinée à un autre dispositif RNIS raccordé à la voie de transmission, le RNIS-DP convertit la commande de protocole DDS en une commande de protocole RNIS et transmet la commande RNIS convertie à un dispositif RNIS de transit adjacent raccordé à la voie de transmission en amont ou en aval. Une fois la voie de test validée, il est possible d'effectuer des essais en boucle sur toute la largeur de bande RNIS disponible, y compris les canaux B1, B2 et D+, à partir d'un ensemble de tests de protocole DDS. L'accès aux tests de protocole DDS est possible par différents moyens : accès par trains de bits multiplexés à un commutateur de sous-répartition numérique; accès par circuit métallique au moyen de l'interface DS0; accès à partir de la face avant de l'unité RNIS-DP.

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