Multiplex communications – Diagnostic testing – Fault detection
Reexamination Certificate
2003-05-14
2009-06-30
Sam, Phirin (Department: 2419)
Multiplex communications
Diagnostic testing
Fault detection
C370S248000
Reexamination Certificate
active
07554923
ABSTRACT:
A method for the automatic activation and deactivation of a tandem connection (2-6) is provided responsive to receiving an activation or deactivation request. Prior to activation, received transmission signals are monitored (M) for an existing tandem connection to avoid creation of overlapping tandem connections. Further, responsive to receiving a deactivation request, the tandem connection sink function (SK1) is deactivated and the existing tandem connection is monitored (M1) to detect when no tandem connection information is received anymore to automatically deactivate the tandem connection source function (SO1) as well. Direct signaling of a sink inactive identifier (RDI) takes also place between the tandem connection terminating network elements (2, 6) to inform the far end tandem connection terminating network element (6) of an automatic deactivation of the tandem connection sink function (SK1). Upon reception of the sink inactive identifier (RDI), the far end network element (6) deactivates its tandem connection source function (SO2).
REFERENCES:
patent: 5555248 (1996-09-01), Sugawara
patent: 5920545 (1999-07-01), Rasanen et al.
patent: 5959998 (1999-09-01), Takahashi et al.
patent: 6381249 (2002-04-01), Chan et al.
patent: 6498796 (2002-12-01), Wang et al.
patent: 6577594 (2003-06-01), Abbas et al.
patent: 6594228 (2003-07-01), Naidoo et al.
patent: 6735736 (2004-05-01), Korall et al.
patent: 6757243 (2004-06-01), Chaudhuri et al.
patent: 6785339 (2004-08-01), Tahernezhaadi et al.
patent: 6798748 (2004-09-01), Hessler et al.
patent: 6807152 (2004-10-01), Hessler et al.
patent: 6859453 (2005-02-01), Pick et al.
patent: 6938187 (2005-08-01), Brissette
patent: 7042847 (2006-05-01), Gourley et al.
patent: 7133365 (2006-11-01), Klinker et al.
patent: 7139479 (2006-11-01), Ohira et al.
patent: 7143161 (2006-11-01), Brissette
patent: 7200157 (2007-04-01), Hessler et al.
patent: 2002/0067698 (2002-06-01), Gourley et al.
patent: 2002/0141332 (2002-10-01), Barnard et al.
patent: 2003/0097472 (2003-05-01), Brissette
patent: 198 36 254 (2000-02-01), None
patent: WO 00/10276 (2000-02-01), None
patent: 1041760 (2000-10-01), None
patent: 08331130 (1996-12-01), None
Brungard D, Vissers M: “Draft new recommendation ITU-T G.709, Update of Com 15-16”, Contribution to T1 Standards Project, Jan. 8-11, 2001, XP002218059, pp. 1-9, 84-87.
Brungard D et al, AT&T: “Tandem Connection Monitoring Functions—Option 1 for Inclusion In G. 783” Contribution to T1 Standards Project, XX, XX, Jan. 6, 1007, pp. 1-12, XP000931363.
Brungard D A, AT&T: “Draft ITU-T G.709” Contribution to T1 Standards Project, XX, XX, Jul. 11, 2000, pp. 1-47, XP000955613.
Goodson W E : “Draft Proposed Standard—T1/105.05 ( Sonet)” Committee T1-Telecommunications T1X1.5/2001-078, Mar. 26, 2001, XP002218060, pp. 1-23.
“G.783: Characteristics of SDH Equipment Functional Blocks” ITU-T Series G. Oct. 2000, XP002218061, pp. 1-24, 163-188, 292-293.
“G.798: Characteristics of Optical Transport network hierarchy equipment functional blocks” ITU-T Series G, Jan. 2002, XP002218062, pp. 1-5, 208-217.
“G.709: Interface for the optical transport network (OTN)” ITU-T Series G, Feb. 2001, XP002218063.
“G.707/Y.1322: Network node interface for the synchronous digital hierarchy (SDH)” ITU-T Series G, Oct. 2000, XP002218064, pp. 1-20, 121-143.
Huck Martin
Jäkel Jörg
ALCATEL
Sam Phirin
Sughrue & Mion, PLLC
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