Method of controlling loop-back process in Ethernet passive...

Multiplex communications – Diagnostic testing – Using oam cells

Reexamination Certificate

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C370S248000, C370S249000

Reexamination Certificate

active

07492719

ABSTRACT:
A method of controlling a loop-back process between a local device and a remote device in an Ethernet passive optical network simplifies the initiation and the termination processes for a loop-back process by avoiding the use of Operation, Administration and Maintenance—Packet Data Unit (OAM PDU) information along with a loop-back control OAM PDU. The method includes the steps of: (a) adding a predetermined field into a loop-back control OAM PDU in the loop-back process, the predetermined field having distinguishing messages for initiation of a loop-back process and messages for termination of a loop-back process; and (b) the local device and the remote device performing a loop-back process using the loop-back control OAM PDU.

REFERENCES:
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patent: 6404740 (2002-06-01), Yoshida
patent: 6636484 (2003-10-01), Agrawal et al.
patent: 6850520 (2005-02-01), Takada et al.
patent: 6873599 (2005-03-01), Han
patent: 2004/0052263 (2004-03-01), Xu
patent: 03-88455 (1991-04-01), None
patent: 08-242242 (1996-09-01), None
patent: 2001-053754 (2001-02-01), None
IEEE 802.3ah Etheret in the First Mile Task Force; “OAM in Frames” Oct. 2001; Presentation Materials, 6 pgs.

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