Alcatel 90003700 RJ45 10/100TX Ethernet Network Module

Alcatel 90003700 ESM-CU-12 is a 12-port RJ45 Ethernet module that adds copper 10/100BASE-TX connectivity to Alcatel-Lucent switching platforms. Also catalogued as the Alcatel Xylan ESM-CU-12, this module provides 12 x RJ-45 ports supporting 10/100 Mbps Ethernet, enabling straightforward expansion of user or device connections in enterprise networks. As a dedicated Ethernet module, it is designed to integrate into compatible Alcatel-Lucent chassis or line cards to increase port density at the access layer. The 90003700 designation and ESM-CU-12 model name are consistently cited in product listings under the same part number, confirming its role as a copper-based 12-port Ethernet expansion module. Typical deployment scenarios include expanding workstations, printers, and other networked devices in LAN environments where 10/100 Mbps copper connectivity is sufficient, or where upgrading port density on legacy Alcatel-Lucent switches is required without upgrading to gigabit ports. When sourcing this part, buyers will recognize it by the 12-port RJ-45 configuration and the 90003700 / ESM-CU-12 identifiers, ensuring compatibility with documented Alcatel-Lucent chassis ecosystems that support 12-port copper Ethernet modules.