Cisco Systems 3825 Manual De Usuario
C H A P T E R
1-1
Cisco 3825 Mobile Wireless Edge Router Software Configuration Guide
OL-15667-03
1
Overview of the Cisco 3825 Mobile Wireless
Edge Router
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.
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
deployment in cell sites, including small size, high availability, and
DC input power flexibility.
This chapter includes the following sections:
•
•
•
•
•
•
•
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
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