Multiplex communications – Wide area network – Packet switching
Patent
1996-04-26
1998-07-21
Voeltz, Emanuel Todd
Multiplex communications
Wide area network
Packet switching
39520067, 39520054, 39518315, 39518301, 370524, 370249, 370251, 379 5, 379 10, 379 12, 379 29, 379353, 379399, H04L 114, H04J 314
Patent
active
057845581
ABSTRACT:
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.
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Emerson Earl A.
Gonzalez Henry J.
Dam Tuan Q.
Integrated Network Corporation
Todd Voeltz Emanuel
LandOfFree
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