1
Overview
Introduction
MSR 20 Routers were self-developed for use on enterprise-level networks. Depending on the network size,
MSR 20 Routers can be either core routers on small and medium enterprise networks, or access routers
for network branches on some large-sized enterprise networks. Therefore, MSR 20 Routers are suitable
for the application on the carrier-level networks, such as telecom management networks and billing
networks. MSR 20 Routers adopt modular design and provide a wide range of optional smart interface
cards (SICs). The MSR-20, MSR 20-21 and MSR 20-40 are available with AC-powered units.
Currently, the MSR 20 includes the following models:
•
MSR 20-20
•
MSR 20-21
•
MSR 20-40
Router Model and Structure
The MSR 20 Routers include MSR 20-20, MSR 20-21, and MSR 20-40. These three models are similar
in chassis structure and layout. All of them can be put on the tabletop and can be mounted in 19-inch
standard racks. The following subsections will give you more details about these three models.
Hardware Specifications
Table 1
Hardware specifications for the MSR 20 routers
Item
MSR 20-20
MSR 20-21
MSR 20-40
Console
1 1 1
AUX
1 1 1
USB
1 1 1
FE
Two FE interfaces
Two FE interfaces
Two FE interfaces
Fixed
interfaces
FE switching
interface
0 8 0
External
modules
SIC module
2 SICs
2 SICs
4 SICs (compatible
with 2 DSICs)
ESM
module
1 1 2
VCPM
module
0 0 1
Internal
modules
VPM
strip
0 0 2
Processor
PowerPC PowerPC PowerPC
Boot ROM
4 MB
4 MB
4 MB
