PoE requirements

ian.springett — Sat, 03 Jul 2021 20:44:31 GMT

We have a 3com 3c17205 PoE switch, we have replaced the 3com wireless AP's with Cisco 1231's, can we use this switch to power the 1231's?

Re: PoE requirements

Rob Huffman — Tue, 06 Mar 2007 13:45:32 GMT

Hi Ian,

I have never tried this combination but I don't think that this will work. The 1200 Series AP's are designed to work with Cisco Pre-standard PoE not IEEE-802.3af as supplied by the 3com. Have a look;

Most Cisco Aironet access points use inline PoE from power injectors or Cisco powered EtherSwitches (Cisco pre-standard PoE), but the Cisco Aironet 350, 1100, and 1200 series access points do not directly support IEEE 802.3af power sources. These access points were designed before the IEEE 802.3af power standard was ratified and must use third party products such as PowerDsine to support IEEE 802.3af power sources.

From this good doc;

Cisco Aironet 1200 Series

Cisco Aironet Power Over Ethernet Application Note

http://www.cisco.com/en/US/products/hw/wireless/ps430/prod_technical_reference09186a008039e541.html#wp39318

Here is the 3Com PoE info;

In-line Power over Ethernet Switch with 24 10/100 Ports

The SuperStack 3 Switch 4400 PWR combines Power over Ethernet technology (IEEE-802.3af) with the advanced features, simplicity, and style of the SuperStack 3 Switch 4400 family.

From this 3Com doc;

http://www.3com.com/products/en_US/detail.jsp?tab=features&pathtype=purchase&sku=3C17205-US

**I would probably go ahead and order the - AIR-PWRINJ3 for each AP. They are really quite cheap 🙂

Hope this helps!

Rob

Re: PoE requirements

ian.springett — Tue, 06 Mar 2007 14:17:09 GMT

Thanks Rob.

As I suspected, just didn't want to waste the capabilities of the switch. Should have bought the Cisco's in the first place!

Rgds

Ian.

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