Техническая Спецификация для Cisco Cisco ONS 15305 Multiservice Customer Access Platform
Data Sheet
© 2008 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.
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Cisco ONS 15305 8-Port 10/100 Ethernet Module
The Cisco
®
ONS 15305 8-Port 10/100 Ethernet module provides eight ports for Layer 1 or
Layer 2 switched transport of Ethernet and Fast Ethernet traffic over SDH networks.
Product Overview
The Cisco ONS 15305 8-Port 10/100 Ethernet Module is a service module for the Cisco ONS
15305 Multiservice Provisioning Platform (MSPP) that supports up to eight 10/100BASE-T ports to
interface with LANs. The module uses ITU-T G.7041 standard Generic Framing Procedure (GFP)
and ITU-T G.707 virtual concatenation (VCAT) to encapsulate and map packets onto the SDH
frame. Sixteen internal WAN mapper ports connect the Ethernet-over-SDH traffic streams to the
TDM fabric on the Cisco ONS 15305, allowing cross-connections to optical STM-n ports. SDH
capacity can be individually configured for each WAN mapper port using standard VCAT, allowing
Ethernet-over-SDH transport at line-rate or below line-rate speeds. Additionally, the module has an
internal Layer 2 switch fabric with 16 10/100 Ethernet ports and 2 Gigabit Ethernet ports.
Depending on the mode of operation, the 10/100 Ethernet ports are connected either to the WAN
mapper ports or to the RJ-45 LAN ports in the front of the module. The Gigabit Ethernet ports are
connected to a centralized crossbar that allows packet connectivity between other Ethernet
modules in the same system. Figure 1 shows a block diagram of the module architecture.
Figure 1. Cisco ONS 15305 8-Port 10/100 Ethernet Module Block Diagram
The Cisco ONS 15305 8-Port 10/100 Ethernet Module supports the following two modes of
operation: 8 Fast Ethernet with 8 Ethernet-over-SDH WAN mapper ports; and 2 Fast Ethernet with
14 Ethernet-over-SDH WAN mapper ports.