Cisco Blog

What is a Cisco CISCO3725-DC-U?

The Cisco CISCO3725-DC-U is described by Cisco as "3725 router w/Universal Power Supply 24/48 volts 32F/256D".  When compared with the CISCO3725 you can quickly see that the only difference appears to be the "Universal Power Supply 24/48 volts".  The Flash and Memory are the same as a regular CISCO3725.


So what is this Universal Power Supply 24/48 volts?  A quick search on Cisco's website reveals that the part number for this universal power supply is actually: PWR-3725-DC-U


The PWR-3725-DC-U is described as: "Spare Universal Power Supply 24 to 48 volts".  The wiring requirements for this power supply are:

A Cisco 3725 router with a DC-input power supply requires copper wire, size AWG 14 (1.625 mm²), for the power connections.

You can connect a single DC power source to either the A input or the B input. If there are parallel dual power sources, connect one source to the A input and one source to the B input; both sources must be the same polarity. A NEBS-compliant chassis ground connection is required with both single source and parallel dual sources

Key Note: The CISCO3725, including the CISCO3725-DC-U have been End-Of-Lifed by Cisco and have been replaced the by the CISCO3825 and CISCO3825-DC respectively.

If you are ever in the market for a Cisco CISCO3725 or CISCO3725-DC-U, Teksavers in Austin, TX buys and sells new & used cisco CISCO3725 routers and can save you up to 90% off list price.  With their SAFE Guard program, you are assured of getting a used router in excellent working condition with a 1 year warranty included.