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BShurilla09

join:2011-05-30
Collinsville, IL

Prestandard POE

So I'm helping a church put in an asterisk voip phone system, and for right now we are going to be going with either Cisco 7940, or 7960's, but we want to have them on a poe network so no need for wall plugs.. what switch should we be getting? We can go up to about $200 for the switch.. Thanks!

supergeeky

join:2003-05-09
United State
kudos:3
How many ports do you need?

Eight: »www.cisco.com/en/US/products/ps1···dex.html

bigsy

join:2001-07-18
ireland
kudos:1
reply to BShurilla09
If you already have a non-POE switch, an alternative to getting a POE switch might be to go for an older PowerDsine midspan such as a PD 6012 or 6006 (depending on the number of phones you need). This will power 7940/7960 phones using their PD-PS-401/Cisco dongle (from memory it simply reverses the polarity needed for pre-standard POE). You can pick these up pretty cheaply on eBay.

chandom

join:2001-05-23
Tallahassee, FL

1 recommendation

reply to BShurilla09
I'm using a 3524-PWR-XL in my lab setup. Using it with a single 7960 for now.

Can be found for around $75 on eBay.

These support Cisco's inline power implementation, not 802.3af.

supergeeky

join:2003-05-09
United State
kudos:3

1 edit
Nice catch...

Lengthy explanation and a way to "hack" it...
»www.voip-info.org/wiki/view/Cisco+POE

A little bit of a fail on my part that needs clarification...
- the Cisco SD208P only has 4 POE ports not 8
- does the Cisco SD208P support the legacy POE implementation that these phones need?