Multiplex communications – Wide area network – Packet switching
Patent
1991-10-30
1993-05-18
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 54, 379220, 379221, 379229, 379230, 379231, 379232, 379233, 379234, H04J 312
Patent
active
052126919
ABSTRACT:
In a private network where PBXs (1, 2) are connected through a primary rate interface (47, 48) to an ISDN network (45), one of the PBXs has routing data for virtual tie trunks for signaling and speech transmission, respectively, to be established via the ISDN to a distant PBX (2), and channel status data indicating their set-up or clear-down state according to time of day and calendar day. The stored data is periodically accessed, and depending on the contents of the channel status data, a call setup or clearing message is sent from the PBX (1) to the ISDN to set-up or clear-down the virtual tie trunks. On receipt of a response from the distant PBX, busy/idle status of the virtual tie trunks is changed according to the accessed channel status data. In response to a request from a user station, a path is established therefrom to the virtual speech tie trunk and a call setup message is sent direct to the distant PBX through the virtual signaling tie trunk.
REFERENCES:
patent: 4348554 (1982-09-01), Asmuth
patent: 4791665 (1988-12-01), Bogart et al.
patent: 5031211 (1991-07-01), Nagai et al.
Blum Russell W.
NEC Corporation
Olms Douglas W.
LandOfFree
Private network with means for establishing virtual tie trunks b does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Private network with means for establishing virtual tie trunks b, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Private network with means for establishing virtual tie trunks b will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-809054