Enterasys Networks XSR-3020 - Manual (Page 22)

System Description
1-2 Overview
Figure 1-1 Typical XSR-3020 Topology
Hardware Features
The semi-modular XSR, shown in Figure 1-2 , comes equipped with the following features:
• Standard 1U chassis (1-11/16 inches high by 17 inches wide by 21 inches deep) mountable in a
standard 19” rack.
• Broadcom 1250 dual-CPU, 64-bit processor (1700 Dhrystone MIPS @ 600 MHz) with load
balancing, 512 KByte on-chip Layer 2 cache, up to two co-issued, load-to-use instruction pairs
per cycle, and 32 KByte Instruction and Data caches.
• Internal, universal (100 - 240 VAC) power supply with country-specific line cords.
PSTN (for PPP)
Network
XSR-3020
Regional site backup:
modem pool
(3rd party RAS)
Primary link:
T1/E1 or serial interface
running PPP
Link backup
with PPP
via external
async modem
Authenticate incoming
PPP connection with
local authentication database
PSTN
IP subnet
XSR-3020 XSR-3020
IP subnet