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Author Topic: Cisco SG300-10 Switch for Yamaha QL5 & Dante  (Read 4777 times)

TomBoisseau

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Cisco SG300-10 Switch for Yamaha QL5 & Dante
« on: February 02, 2017, 05:12:54 pm »

I'm about to purchase my first Cisco SG300-10 switch for use with a Yamaha QL1 and QL5.  The problem is that there seems to be MANY choices within this same product line (see the link below and the click "View All").

The features I want are:
10 ports
PoE

But, even then there appears to be a few different versions.  Could someone please assist me in choosing?

Thanks,
Tom


http://www.cisco.com/c/en/us/support/switches/small-business-300-series-managed-switches/tsd-products-support-series-home.html

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Nathan Grater

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Re: Cisco SG300-10 Switch for Yamaha QL5 & Dante
« Reply #1 on: February 02, 2017, 07:25:33 pm »

They are great switches. This is my understanding of of the differences:

SG300-10 - no POE

SG300-10P has 8 POE ports but is limited to 15W/port and total of 64watts

SG300-10MP has 8 POE ports but is limited to 15W/port and total of 124watts

SG300-10MPP has 8 POE ports but is limited to 30W/port and total of 124watts
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TomBoisseau

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Re: Cisco SG300-10 Switch for Yamaha QL5 & Dante
« Reply #2 on: February 02, 2017, 08:00:54 pm »

They are great switches. This is my understanding of of the differences:

SG300-10 - no POE

SG300-10P has 8 POE ports but is limited to 15W/port and total of 64watts

SG300-10MP has 8 POE ports but is limited to 15W/port and total of 124watts

SG300-10MPP has 8 POE ports but is limited to 30W/port and total of 124watts


Ah! Okay.  That helps a lot.

Thanks so much.

I'm inclined to purchase the model with the highest wattage for PoE with 10 ports.  I suspect while I might not need it now, in the future I'll probably glad I spent the few extra dollars.  I'm leaning towards the SG300-10MPP which is 124W (PoE+ supported).  What do you think?  Any comments?


I see there is a comparison chart with specs here:

http://www.cisco.com/c/en/us/products/collateral/switches/small-business-smart-switches/data_sheet_c78-610061.html

« Last Edit: February 02, 2017, 08:10:08 pm by TomBoisseau »
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Ade Stuart

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Re: Cisco SG300-10 Switch for Yamaha QL5 & Dante
« Reply #3 on: February 03, 2017, 08:54:44 pm »

Personally, I find the 10 port Cisco SG300 with POE a pain to package. You can rack mount them but there is a large external power supply.
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TomBoisseau

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Re: Cisco SG300-10 Switch for Yamaha QL5 & Dante
« Reply #4 on: February 04, 2017, 08:46:19 am »

Personally, I find the 10 port Cisco SG300 with POE a pain to package. You can rack mount them but there is a large external power supply.

You make a good point, and I am aware that many prefer to get the rack mount version with 20 ports or more.  For my application, this unit will never be in a rack and, I just prefer to have a smaller footprint.

Thanks,
Tom

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TomBoisseau

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Re: Cisco SG300-10 Switch for Yamaha QL5 & Dante
« Reply #5 on: February 04, 2017, 09:52:38 am »

Are there any concerns plugging non PoE devices into the PoE ports of the SG300-10MPP?  For instance a console, Rio box, or another non PoE switch?

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Ade Stuart

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Re: Cisco SG300-10 Switch for Yamaha QL5 & Dante
« Reply #6 on: February 04, 2017, 10:36:45 am »

Are there any concerns plugging non PoE devices into the PoE ports of the SG300-10MPP?  For instance a console, Rio box, or another non PoE switch?

I haven't seen any problems connecting QLs, Rios, WAP and other switches. I've never felt the need to check but I suspect POE is configurable by port on the SG300 and I believe POE is only supplied after handshaking.
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Mac Kerr

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Re: Cisco SG300-10 Switch for Yamaha QL5 & Dante
« Reply #7 on: February 04, 2017, 10:42:03 am »

I believe POE is only supplied after handshaking.

I wonder how handshaking works when one of the devices hasn't been powered up yet...

Mac
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Philip Roberts

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Re: Cisco SG300-10 Switch for Yamaha QL5 & Dante
« Reply #8 on: February 04, 2017, 12:03:13 pm »

I wonder how handshaking works when one of the devices hasn't been powered up yet...

Mac
A Powered Device has a 25k resistor across the powered pair(s) when powered off. Higher or lower resistance means that power isn't supplied.

High power modes are negotiated after an initial low power startup.

Philip
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Ade Stuart

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Re: Cisco SG300-10 Switch for Yamaha QL5 & Dante
« Reply #9 on: February 04, 2017, 12:16:38 pm »

I wonder how handshaking works when one of the devices hasn't been powered up yet...

Mac

An active device can interrogate a passive device before the interrogated device is powered. This is a protocol that is used in electric vehicle charging for example but now we are off topic... 
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Scott Holtzman

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Re: Cisco SG300-10 Switch for Yamaha QL5 & Dante
« Reply #10 on: February 05, 2017, 08:17:56 am »

An active device can interrogate a passive device before the interrogated device is powered. This is a protocol that is used in electric vehicle charging for example but now we are off topic...


802.3af is the specification.  It's and IETF spec.  Being able to plug a non-powered device in without damage is a requirement.  http://www.rhyshaden.com/eth_poe.htm



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TomBoisseau

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Re: Cisco SG300-10 Switch for Yamaha QL5 & Dante
« Reply #11 on: February 06, 2017, 08:39:22 pm »

Well...

I just picked up a SG300-10MPP.  You guys are right!  That's a BIG, nasty, power supply.  I understand now why so many were recommending the rack mount 20/24 port version with an internal power supply!  That probably makes sense.

Tom

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