WAN Subsystem Configuration and Management Manual

Overview of the WAN Subsystem
WAN Subsystem Configuration and Management Manual—522463-011
2-19
Supported Electrical and Physical Interfaces
The SWAN 2 concentrator contains hardware components that you can replace
yourself, which are called customer-replaceable units (CRUs). Table 2-10 lists these
CRUs.
Figure 2-3 on page 2-20 shows the front panel of the SWAN 2 concentrator with the
CRUs labeled. Note that the CRUs labeled “WAN” are referred to as CLIPs in this
manual.
Note. All the SWAN 2 concentrator CRUs can be replaced online without powering off the
SWAN 2 concentrator, except for the chassis CRU.
Table 2-10. SWAN 2 Concentrator CRUs
CRU Description
Communications line interface
processor (CLIP)
Also known as a WAN logic board (LB). Contains the
internal local area network (LAN) logic and WAN logic,
communications controller, random-access memory
(RAM), flash memory, and all the intelligence for the
SWAN 2 concentrator. Six CLIPs are located on the front
panel of a SWAN 2 concentrator.
WAN backplane interface card
(BIC)
Provides the connectors for the WAN interface converter
cables. Six WAN BICs are located on the back panel of a
SWAN 2 concentrator.
LAN logic board (LB) Provides the LAN connection to the host. The LAN LB
also has a switch to connect the host LAN to each CLIP.
Two LAN LBs are located on the front panel of a SWAN 2
concentrator.
LAN BIC Provides the RJ-45 direct connection to the host and has
light-emitting diodes (LEDs) to indicate the type of host
connection. Two LAN BICs are located on the back panel
of a SWAN 2 concentrator.
Power supply Provides redundant power to the components within the
SWAN 2 concentrator. Two power supplies are located
on the front panel of a SWAN 2 concentrator.
Battery Provides 30-second backup power in case of AC power
loss. One battery is located on the back panel of a
SWAN 2 concentrator.
Fan Provides cooling to the components within the SWAN 2
concentrator. Two fans are located on the back panel of a
SWAN 2 concentrator.
Chassis Contains the midplane and the sheet metal for the other
CRUs; the chassis cannot be replaced without powering
off a SWAN 2 concentrator.