Cisco Systems 3825 manual Edge Router, Introduction

C H A P T E R 1

Overview of the Cisco 3825 Mobile Wireless

Edge Router

The Cisco 3825 Mobile Wireless Edge Router is a networking platform optimized for use in mobile wireless networks; specifically designed to be used at the cell site edge as a part of a 2G, 3G or 4G Radio Access Network (RAN). The Cisco 3825 Mobile Wireless Edge Router is a general purpose router platform specializing in 2/2.5G Global System for Mobile Communication (GSM) and 3G Universal Mobile Telecommunication System (UMTS) RAN backhaul transport and optimization.

The Cisco 3825 router offers high performance at a low cost while meeting the critical requirements for deployment in cell sites, including small size, high availability, and

DC input power flexibility.

This chapter includes the following sections:

•Introduction, page 1-1

•Cisco IOS Software Features, page 1-6

•MIB Support, page 1-10

•Limitations and Restrictions, page 1-11

•New Features in Cisco IOS Release 12.4(16)MR2, page 1-13

•New Features in Cisco IOS Release 12.4(16)MR1, page 1-13

•New Features in Cisco IOS Release 12.4(16)MR, page 1-27

Introduction

A typical RAN is composed of thousands of Base Transceiver Stations (BTSs)/Node Bs, hundreds of Base Station Controllers/Radio Network Controllers (BSCs/RNCs), and several Mobile Switching Centers (MSCs). The BTSs/Node Bs and BSCs/RNCs are often separated by large geographic distances, with the BTSs/Node Bs located in cell sites uniformly distributed throughout a region, and the BSCs, RNCs, and MSCs located at suitably chosen central offices (COs) and/or Mobile Telephone Switching Offices (MTSOs). The traffic generated by a BTS/Node B is transported to the corresponding BSC/RNC across a network, referred to as the backhaul network, which is often a hub-and-spoke topology with hundreds of BTSs/Node Bs connected to a given BSC/RNC by point-to-point time-division multiplexing (TDM) trunks. These TDM trunks may be leased line T1/E1s or their logical equivalents, such as microwave links or satellite channels. The interface between the BTS and BSC in GSM and Code

Cisco 3825 Mobile Wireless Edge Router Software Configuration Guide

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