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US 2004/0105456 A1Published application
Digital cross-connect
AssigneeEricsson Inc.
InventorsSergio Lanzone, Agostino Damele, Ghani Abbas
Life of this patent
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AssigneeEricsson Inc.
InventorsSergio Lanzone, Agostino Damele, Ghani Abbas
Estimating the term…
A digital cross-connect (DXC) (10) comprises: a plurality of ports (30-100) for receiving/outputting signals and switching and switching means (20) for selectively cross-connecting signals applied to one port to one or more other ports. The cross-connect (10) is characterized in that the switching means (20) comprises a single switching matrix which is arranged to be capable of switching Optical Data Units (ODU). Alternatively or in addition the switching matrix is arranged to be capable of transparently switching complete Synchronous Digital Hierarchy (SDH) synchronous transport modules STM-N and/or complete SONET synchronous transport transport signal STS-N derived from optical carriers OC-N and/or SDH vitual containers VC-3, VC-4, and/or concatenated virtual containers VC-4-nc where n=4, 16, 64 or 256 as defined in ITU-T Recommendation G.707 and/or SONET synchronous transport system STS-1s, STS-nc where n=3, 12, 48, 192 or 768 as defined in Telcordia GR253.
A digital cross-connect (10) comprising:
A cross-connect according to any preceding claim wherein, one or more of the ports is/are for receiving/outputting optical traffic signals comprising SONET synchronous transport signal STS-N derived from optical carriers OC-N, the cross-connect being capable of transparently switching complete STS-N.
A cross-connect according to any preceding claim and further characterized in that it is capable of switching SDH virtual containers VC-3, VC-4, and/or concatenated virtual containers VC4-nc where n=4, 16, 64 or 256 as defined in ITU-T Recommendation G.707 and/or SONET synchronous transport system STS-1s, STS-nc where n=3, 12, 48, 192 or 768 as defined in Telcordia GR253.
A cross-connect system according to any preceding claim and further comprising means for checking the integrity of the switching.
A cross-connect according to any preceding claim and further comprising means for non-intrusively monitoring the traffic signals being switched.
A cross-connect according to any preceding claim and further comprising means for synchronising and justifying the traffic signals being switched.
A cross-connect according to any preceding claim and further comprising switch protection means (20a).
A cross-connect system according to any preceding claim in which one or more of the ports is configured for receiving/outputting Optical traffic signals comprising Optical Transport Modules (OTM), said port/s further comprising means for extracting Optical Data Units (ODU-ks) from the OTM signal and means for multiplexing and demultiplexing ODUs.
A cross-connect according to any preceding claim and further comprising means for providing automatic path set-up which utilizes General Multi Protocol Label Switching (GMPLS) or a signalling channel.
Dependencies are inferred from the claim text.