Group C circuit packs
Overview
The information describes the details of each of the Ethernet circuit packs that are installed in the Group C slot of Alcatel-Lucent 1850 TSS-5. These circuit packs support the 4 RJ-45 10/100 Mb/s Ethernet interfaces, identified as the C Group, on the shelf access panel. Some circuit packs provide additional optical Ethernet interfaces on the circuit pack.
3-Port Optical Fast Ethernet interface (VLNC33)
The VLNC33 circuit pack is available beginning in Release 7.2. It is installed in the Function Group C slot of the Alcatel-Lucent 1850 TSS-5 shelf. The Function Group C slot does not support an additional protection circuit pack. The circuit pack serves as an extension board for the VLNC42B Ethernet Aggregator circuit pack and supports up to three optical FE PTMs that provide three additional optical FE interfaces for the VLNC42B. The VLNC33 is only supported when the VLNC42B is inserted in the Main2 slot; the VLNC33 is not supported if any other pack is installed in the shelf other than the VLNC42B in Main 2. These three FE ports serve as UNI ports of VLNC42B. However, these ports do not support ERP, 1588v2, Y.1731, fast CCM, or VLAN loopback.
The VLNC33 optical ports use pluggable transmission modules (PTMs). They can be plugged into a circuit pack as they become necessary. This allows customers to grow their network incrementally, only realizing the cost of optics when they are needed to provision service. PTMs are not included when VLNC33 pack is purchased and shipped. PTMs are purchased and installed separately by the customer as needed.
Optical/Electric 10/100 (VLNC35) Ethernet interface
The VLNC35 circuit pack is available beginning in Release 5.1. It is installed in the Function Group C slot of the Alcatel-Lucent 1850 TSS-5 shelf. The Function Group C slot does not support an additional protection circuit pack. The VLNC35 is designed to support Fast Ethernet Private Line applications. Each VLNC35 circuit pack can support 6 Private Lines. The VLNC35 supports VT1.5/VC-12, STS-1/VC-3 (low-order), and STS-3c/VC-4 cross-connections. Cross-connections are supported on up to 8 STS-1/VC-3s on the VLNC35 packs.
The VLNC35 supports the following capabilities:
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Standard Ethernet switching per IEEE 802.1
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Standard encapsulation according to ITU G.7041 for Generic framing procedure (GFP)
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Virtual Concatenation (VCAT) per ITU G.707
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Support for up to 6 VCG ports
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Support for LCAS
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Support for STS-1/VC-3, STS-3c/VC-4, and VT1.5/VC-12 mode (up to 224 VT1.5s or 168 VC12s may be used between 1 and 63 assigned to any VCG.)
The VLNC35 supports 2 optical 100BASE-LX ports and four 10/100BASE-T electrical ports, that provide 10/100 Mb/s links using standard Ethernet switching (IEEE 802.1), standard encapsulation according to ITU G.7041 for Generic Framing Procedure (GFP), and ITU G.707 for Virtual Concatenation (VCAT). The electrical interfaces supported by the VLNC35 can transmit signals up to 100 meters. The optical interfaces can transmit signals up to 10,000 meters.
The VLNC35 optical ports use pluggable transmission modules (PTMs). They can be plugged into a circuit pack as they become necessary. This allows customers to grow their network incrementally, only realizing the cost of optics when they are needed to provision service. PTMs are not included when VLNC35 packs are purchased and shipped. PTMs are purchased and installed separately by the customer as needed.
When VT mapping is selected, up to 8 STS1s/TUG3s are available for cross-connection at any rate (STS1, STS-3c, VT1.5, VC3 (low-order), VC4, VC12). Each VCG supports up to 1 STS3c/VC4 (with virtual concatenation not allowed), up to 3 STS1/VC3, or up to 63 VT1.5/VC12. A report provides backplane usage information, and on-demand backplane optimization is provided; this optimization is service affecting.
Electrical connections to the 10/100BASE-T interface are via multi-service connectors on the Alcatel-Lucent 1850 TSS-5 VLIU while optical ports are located on the faceplate of the VLNC35.
Figure 4-3: VLNC35 Fast Ethernet (Private Line) circuit pack
Legend:
The electrical ports auto-negotiate speed (10/100 Mb/s) and flow control when interfacing with other 802.3 compliant devices over twisted pair media. The ports supports the full duplex mode only.