Juniper E Series Hardware Manual page 20

ERX 7.0.x Hardware Guide
Figure 1: E-series Router Communicating over T1/T3 Lines
Remote
access
Hub
router
PC
Desktop
Figure 2: E-series Router Communicating over DSL Lines
PC
Home office
DSLAM
PC
Home office
In Figure 3, the ERX-310 router is being used as an access router in a
small POP location. The router is deployed by the service provider at the
customer site as a CPE (customer premises equipment).
Figure 3: ERX-310 Router Deployed in a Small POP
xDSL
T1/E1
T3/E3
CPE
GE
CPE
CPE
4
Where E-series Routers Fit In
Internet
T1/T3
OC3
ERX
Internet
DS3
OC3
ERX
ERX
SONET or ATM
infrastructure
GE
OC3/12
cOC3
cOC12
Remote
Core
access
router
router
Remote
Core
access
router
router
GE
OC3
VPN
ISP
Hub
PC
Desktop
Hub
PC
Desktop