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I was wondering if the PWR-2911-POE and PWR-2911-AC can be installed in same 2911 router? Thanks.

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No, both of them are power supplies. PWR-2911-AC is the standard power supply but the PWR-2911-POE is a bigger power supply to power up EHWIC or single/double-width line cards. Moreover, there is no physical way to put two same/different power supplies into a 2900 router. But 3800/3900 routers can support dual power supplies. Cisco 2900 Router Price Buy Cisco ISR 2900 Series Routers 3Anetwork com

Posted on Apr 03, 2015

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Will the PoE Function of S2700/S3700/S5700 PoE Switches Be Affected When a 110 V Power Source Is Used?


When using Huawei power supply units, Huawei fixed switches supports 110 V AC input power. The power consumption of most powered devices (PDs) is 4 W to 5 W; therefore, 250 W and 500 W power supply units can provide sufficient PoE power for PDs.
NOTE:
All fixed PoE switches except the S2700-9TP-PWR-EI, S2750-20TP-PWR-EI-AC, S2750-28TP-PWR-EI-AC, S2751-28TP-PWR-EI-AC, S5700-10P-PWR-LI-AC, S5700-28P-PWR-LI-AC, S5700-28TP-PWR-LI-AC, S5700S-28P-PWR-LI-AC, S5701-28TP-PWR-LI-AC, S5700-52P-PWR-LI-AC, S5700-28X-PWR-LI-AC, and S5700-52X-PWR-LI-AC support double PoE power supply units.

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1 Answer

Can AC and DC Power Modules Be Used in the Same Switch?


Fixed Switches Product Series Model AC and DC Power Module Mixing S3700/S5700/S6700 S3700-26C-HI Supported S5710-28C-EI Supported S5710-52C-EI Supported S5700-28C-HI Supported S5700-28C-HI-24S Supported S5700-EI (non-PoE) Supported in V200R005 S5700-SI (non-PoE) Supported in V200R005 S6700 Supported in V200R005 S5710-HI AC and DC power modules cannot be used together, but 350 W and 1150 W AC power modules can be used in one switch. S5720-HI Supported Modular Switches · When a switch does not use a PoE power module:
AC and DC power modules cannot be used together in the same type of power slots. Power modules with different power values cannot be used together either.
·
· When a switch uses a PoE power module:
Version PoE Power Module System Power Module V200R005C00 and earlier versions AC AC DC power module not supported - V200R006C00 and later versions AC AC DC DC AC DC ·
AC and DC power modules cannot be installed in the slots of the same type (system or PoE) in the same switch, and the power modules of different power values cannot be used in the same switch.
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How to block web access to facebook on cisco 2911 router


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1 Answer

I have a 2811 router with a PWR-2811-DC power supply in it. I have a PWR-2811-AC power supply that I would like to install in place of the DC input supply, but there is a second internal electrical...


No.
AC power is like a child's swing -- it goes from "neutral" to "positive" to "neutral" to "negative" to "neutral", and repeats.
DC power is like leaning into a strong wind -- as long as you keep leaning, you stay on your feet; stop leaning, and the force of the wind will blow you down.

So, you cannot substitute AC for DC power.

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