OMS 3250

OMS3250Product DescriptionMSH2KSTM-n @VC-4/4-ncHO-VC(VC-4/4-nc)SWITCHWORKING5GHO-VC(VC-4/4-nc)SWITCHPROTECTIONSTM-n @VC-4/4-nc5G5GadaptationadaptationUnit ALO-VCSWITCHWORKING5GLO-VCSWITCHPROTECTIONUnit B5G5GRS-MS HO termLO TU ProcessingRS-MS HO termLO TU ProcessingW1 W2WN E1 E2 ENTributary STM-nFigure 10: LO-VC Switch cards redundancyThe LO-VC Switching subsystem can offer the following services:• Cross-connection at LO-VC level of TUG structured HO-VC received from the native STM-nunits @VC-4/4-nc up to a capacity of 10G (i.e. 64x64 TUG structured VC-4). With thisfeature it is possible to groom and re-distribute the LO-VC contained inside a set of VC-4received from the HO-VC switching subsystem and collected by the STM-n cards ofOMS3250.In Figure 11 a general view of the processing inside the equipment is described: the STM-nunit @VC-4/4-nc receives from the line a TUG structured VC-4. If LO-VC switching isrequired, the HO-VC is cross-connected by the HO switch (1) to the slot where the LOSWITCH unit is equipped. The first action performed by the LO SWITCH unit is thetermination of the VC-4 POH and the TU Pointer processing (2). After the cross-connectionat LO-VC level (3), LO-VC are groomed again in a TUG structured VC-4 (4), and forwarded,via backplane links, to the HO switch. The VC-4 is then cross-connected (5) and sent to anSTM-n @VC-4/4-nc unit. In the figure below only one LO SWITCH unit and only one HO-VC switching subsystem is presented for simplicity.Issue 1 Copyright – Refer to Page 2 Page 37 of 74