Chapter 1
OVERVIEW
PRODUCT DESCRIPTION
Delivering a comprehensive set of Ethernet services requires an intelligent Ethernet network interface unit (ENIU) to serve as the service demarcation point at the edge of the customer's network. A critical component of a carrier-class Ethernet access system, the ENIU defines the edge of the carrier's management domain. Once in place, the ENIU serves an important function by collecting local performance and error data on both the access loop and the customer's network.
Operations Administration and Maintenance (OAM), sub-layer defined by IEEE 802.3ah is intended to facilitate management of Ethernet for subscriber access networks. The ENIU is designed to allow the carrier to segregate, isolate and troubleshoot network problems remotely through use of the OAM Protocol Data Units (PDU). The ENIU provides the following capabilities:
•One Ethernet Network Port
•One Ethernet Subscriber Port
•Full 802.3ah OAM functionality
•Enhanced OAM features provided via organization specific extension OAM PDU's
•Firmware that provides:
–Bandwidth Allocation
–Daily performance history log access
–15 minute performance history log access
•One RS-232 console port to provide a command line interface to all of the management, status, and mainte- nance functions of the ENIU
•Local and Remote Field Software download
The ENIU provides interfaces for Central Office (Network) and Subscriber Ethernet through Small Form-factor Pluggable (SFP) modules and/or RJ-45 connectors. RS-232 craft port interface is provided through a DB-9 connector. Power is supplied through a connector located on the rear. A front and rear view of the ENIU with SFPs is shown in Figure 1-1.
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Figure 1-1. ENIU with SFPs
