10/100T Ethernet (LNW66)

Electrical specification

The 10/100T circuit packs provide a 24-port, 100BASE-T, IEEE 802.3-compliant interface that is capable of spanning distances of 100 meters. The 10/100T circuit pack provides Fast Ethernet switched services. The 10/100T interface auto-negotiates mode (full/half duplex) and speed (10/100 Mbps) when interfacing with other 802.3-compliant devices over twisted pair media. The 10/100T circuit packs are not equipment protected. However, facility protection can be provided through the WAN via SONET (UPSR, BLSR, or 1+1) and/or (on the LNW66) through the IEEE 802.1W spanning tree algorithm.

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).

When Alcatel-Lucent 1665 DMX is equipped with non-VLF Main packs, Ethernet packs can only occupy slot 1 of any Function Unit group or Growth slot on the shelf (A1–G1). When all available slots are equipped with LNW66 circuit packs, up to 120 ports are addressable. If the circuit packs only occupy slot 1 of a Function Unit or Growth 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, Ethernet packs can be installed in either slot 1 or 2 of Function Unit or Growth groups. When all available slots are equipped with LNW66 circuit packs, up to 240 ports are addressable.

Format specification

The 10/100T circuit packs comply with the following formatting standards:

• Maximum frame size see Packet size in different tagging modes

• standard IEEE 802.1Q VLANs

• Ethernet to SONET Mapping, (G.7041 (GFP) and G.707 (Virtual Concatenation)

• Protection (SONET and/or 802.1W) and Ethernet Bridging (802.1D)

Performance monitoring

Performance monitoring capabilities are available on the 10/100T circuit packs, however Threshold Crossing Alerts (TCAs) are not supported (except on the first two items listed below). Monitored parameters include:

• Dropped Frames (congestion)

• Dropped Frames (errors)

• Incoming Number of Bytes

• Outgoing Number of Bytes

• Incoming Number of Frames

• Outgoing Number of Frames

Performance monitoring capabilities are available on the 10/100T circuit packs. For a detailed list of monitored parameters, see Performance monitoring.