Private branch exchange

Telephonic communications – Centralized switching system – Structure of equipment

Reexamination Certificate

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Details

C379S328000, C361S600000, C361S601000, C361S602000

Reexamination Certificate

active

06973177

ABSTRACT:
Disclosed is a private branch exchange (PBX) that offers high efficiency in wiring cables, at the same time, protects cables in highly safety manner. The PBX includes a PBX section and a casing that covers and holds the PBX section. The casing contains an inner-bottom plate, a support column, and a pedestal. Cables for connections with external circuitry can be connected to the PBX section on the front side of the interior of the casing. The inner-bottom plate holds the bottom of the portion of the casing on which the PBX section is accommodated. The support column is disposed on the lower surface of the inner-bottom plate. Disposed beneath the support column, the pedestal holds the entire of the casing. The support column has a curved surface on the front side, protecting cables wired between the inner-bottom plate and the pedestal.

REFERENCES:
patent: 4304966 (1981-12-01), Beirn et al.
patent: D307752 (1990-05-01), Yoshida et al.
patent: D338874 (1993-08-01), Renard
patent: 5235133 (1993-08-01), Roth et al.
patent: 5548086 (1996-08-01), Greenfield et al.
patent: 5832073 (1998-11-01), Hannigan et al.
patent: 6301095 (2001-10-01), Laughlin et al.
patent: D450665 (2001-11-01), Isely et al.
patent: 5-160586 (1993-06-01), None

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