Datasheet

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Q. Are the AC, AC-IP, and DC power supplies field-upgradeable and field-serviceable?
A. Yes. The Cisco 3845 AC, AC-IP, and DC power supplies are field-upgradeable and orderable as spares. In addition, each power supply is hot-
swappable and provides status signals for proper operation and installation. The Cisco 3825 AC power supply may also be replaced in the field, but
the chassis must be removed from a rack, the top opened, the wiring harness unplugged, and the power supply mounting screws undone. Table 9
shows the part numbers for power supply options for the Cisco 3800 Series.
Table 9. Cisco 3800 Series Power Supply Spare Options
Product Number Description
PWR-3825-AC= Cisco 3825 AC power supply
PWR-3825-AC-IP= Cisco 3825 AC-IP power supply
PWR-3825-DC= Cisco 3825 DC power supply
PWR-3845-AC= Cisco 3845 AC power supply
PWR-3845-AC-IP= Cisco 3845 AC-IP power supply
PWR-3845-DC= Cisco 3845 DC power supply
PWR675-AC-RPS-N1= 675W RPS with one connector cable
CAB-RPS-1614= One Cisco RPS 675 connector cable 16/14
Q. Can Cisco 3800 systems be converted from an AC to a DC power supply and vice versa?
A. Yes. If you convert from an AC power supply to a DC power supply, you need to order the spare DC power supply and also order the DC
power cable. If you convert from a DC power supply to an AC power supply, you need to order the spare AC power supply and also order the AC
power cable.
Q. Can different power supplies be used together on a Cisco 3845 router?
A. Yes. You can mix system power supplies any way you want in the Cisco 3845 chassis, but DC system power supplies do not support the IP
phone power supplies.
MEMORY
Q. What is the default memory configuration of the Cisco 3800 Series?
A. Table 10 lists the base memory that each configuration supports as a default when it ships from the factory.
Table 10. Cisco 3800 Series Base Memory Configuration
Product Name Description
CISCO3825 One 64-MB Compact Flash, one 256-MB DDR-SDRAM with ECC
CISCO3845 One 64-MB Compact Flash, one 256-MB DDR-SDRAM with ECC
Q. Is the Cisco 3825 SDRAM memory compatible with the Cisco 3845 SDRAM memory?
A. Yes. The Cisco 3825 and Cisco 3845 use the same DDR-SDRAM with ECC.
Q. Does the default DRAM comes with one or two SDRAM DIMMs?
A. The default DRAM comes with one DIMM of 256 MB, leaving the second dual inline memory module (DIMM) slot open for future memory
upgrades.