Power Supplies - Cisco 2900 series Installation Manual

Hardware Features
Table 1-8
Router Platform
Cisco 3945
Cisco 3925E
Cisco 3945E

Power Supplies

Cisco 2900 series and Cisco 3900 series ISRs support a variety of power supply configurations. All
power supplies are field replaceable and externally accessible with the exception of the Cisco 2901 ISR.
The Cisco 2901 ISR has an internal power supply, which requires removing the cover for replacement.
If configured with dual power supplies or an Redundant power supplies (RPS), the power supplies are
hot swappable. RPSs require an RPS adapter. There are two versions of the RPS adapter, one for the
Cisco 2911 and one for the Cisco 2921 and 2951. Both use the Cisco Redundant Power System 2300.
Configurations include AC and DC (with and without IP), Dual DC, internal POE, and POE boost.
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•
Table 1-9 Cisco 2900 Series and Cisco 3900 Series Field Replaceable Unit Power Options
Router AC +
Model AC POE DC Hot Swap
2901 X X —
2911 X X X
2921 X X X
2951 X X X
3925 X X X
3925E X X X
Cisco 2900 Series and 3900 Series Hardware Installation Guide
1-24
Router Memory Specifications (continued)
DRAM
Type—VLP RDIMM with ECC
VLP RDIMM sizes—512 MB and 1 GB.
VLP RDIMM expansion slots—2; both must be the same density.
Default VLP RDIMM memory modules—Two 512-MB modules for a
maximum of 1 GB.
Maximum memory—2.0 GB; 1.0 GB in each slot.
Type—VLP RDIMMwith ECC.
VLP RDIMM sizes—512 MB, 1GB.
VLP RDIMM expansion slots—2, both must be the same density.
Default ECC memory modules—Two 512-MB modules for 1 GB.
Maximum memory—2.0 GB; 1.0 GB in each slot.
Type—VLP RDIMMwith ECC.
VLP RDIMM sizes—512 MB, 1GB.
VLP RDIMM expansion slots—2, both must be the same density.
Default ECC memory modules—Two 512-MB modules for 1 GB.
Maximum memory—2.0 GB; 1.0 GB in each slot.
Table 1-9 summarizes the power options.
Table 1-10 shows POE power rates.
Internal
1 2
RPS
— —
X —
X —
X —
X X
X X
External
3 4
RPS Dual DC Internal POE
—
X —
X —
X —
— —
— —
Chapter 1 Overview of the Routers
Internal External
POE Boost POE Boost
X —
X —
X —
X —
X X
X X
5
—
X
X
X
—
—
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