The LNW74 circuit packs provide 16 10/100BASE-T, IEEE 802.3-compliant electrical interfaces (via the backplane of the shelf) that are capable of spanning distances of 100 meters. The LNW74 also provides 8 optical 100BASE-ZX/LX/FX IEEE 802.3-compliant (100 Mbps) fast Ethernet interfaces. The LNW74 is a Private Line circuit pack.
The 10/100T interface function is full duplex mode and auto-negotiates speed (10/100 Mbps) when interfacing with other 802.3-compliant devices over twisted pair media. The LNW74 circuit pack must be housed in slot 1 of a Function Unit group and is not equipment protected. However, facility protection can be provided through the WAN via SONET (UPSR, BLSR, or 1+1). The LNW74 also supports low- and high-order (STS/VT) VCAT.
When Alcatel-Lucent 1665 DMX is equipped with non-VLF Main packs, LNW74 packs can only be placed in Slot 1 of any Function or Growth group in the shelf (A1–G1) and Alcatel-Lucent 1665 DMX supports a total capacity of 64 10/100BASE-T electrical ports and 40 100BASE-X optical ports if all available slots are equipped with LNW74 circuit packs. When the LNW74 circuit packs occupy only slot 1 of a Function Unit group, slot 2 must be populated with an apparatus blank.
When Alcatel-Lucent 1665 DMX is equipped with VLF Main (LNW59, LNW82, or LNW504) packs, LNW74 packs can occupy Slot 1 and Slot 2 of any Function or Growth group (A1–G1). The Port Configuration of the circuit packs must be provisioned as FX to support LNW74 packs in both companion slots. With VLF Mains and available tributary slots populated with LNW74 packs, up to 64 10/100BASE-T electrical ports and 40 100BASE-X optical ports are provided if all available slots are equipped with LNW74 circuit packs and the Port Configuration of the circuit packs is FT_FX. Additional ports can be added if the companion slot to the LNW74 is populated with a compatible front-access Ethernet pack, like an LNW170. With VLF Mains and available tributary slots populated with LNW74 packs, up to 80 100BASE-X optical ports are provided if all available slots are equipped with LNW74 circuit packs and the Port Configuration of the circuit packs is FX.
In all scenarios, when the LNW74 is installed in slot G1 or G2, the Port Configuration of the circuit pack is FX and only optical PTMs can be used.
The LNW74 utilizes 100BASE-X PTM optics. These PTM optics can be ordered and plugged into the LNW74 as their capacity becomes needed.
For the detailed specifications of these optics, see:
The LNW74 provides 16 electrical ports for the 10/100BASE-T interfaces. These electrical ports transmit at 10/100 Mbps using standard Ethernet switching IEEE 802.1, standard encapsulation, and standard STS-1 and VT virtual concatenation according to ITU G.707. The LNW74 electrical interfaces can transmit signals across spans as long as 100 meters.
The LNW74 circuit pack is designed specifically to support Fast Ethernet Private Line applications. Each LNW74 circuit pack can support 24 private lines. The LNW74 can also support STS-3(c) cross-connections instead of virtual concatenation.
The 10/100T Ethernet interfaces comply with the following transmission standards:
standard IEEE 802.1D for transparent bridging and spanning tree protection.
standard IEEE 802.3, Section 25 for 10/100 Mb autonegotiation (including flow control, full-duplex transmission, and half-duplex transmission).
For detailed specifications, see 100/1000BASE-T electrical Ethernet specification.
Performance monitoring capabilities are available on the LNW74 circuit packs. A detailed list of monitored parameters can be found in Performance monitoring.
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