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Author Topic: No VoIP behind DGS-1210-28p with AVM FritzBox  (Read 3480 times)

drasche

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No VoIP behind DGS-1210-28p with AVM FritzBox
« on: June 23, 2015, 02:15:25 PM »

Hey guys,

recently bought a DGS-1210-28P to have more ports and to fire up my Cisco IP Phones and a wireless access point. Unfortunately my VoIP config doesnīt work with the DGS... Here is the setup:

I have a Fritzbox 7490 running in IP Client mode connected to the DGS-1210 and my firewall is also connected to the same switch. The firewall has a second link to a DSL modem to connect to the internet. The Fritzbox is configured with 3 VoIP numbers from 1und1 (German provider), but since the DGS is now the center of the network, the Fritzbox can no longer register the VoIP numbers with 1und1. I tried configuring all possible port settings like fixed speed, IGMP snooping, disabling VoiceVLAN and all ports are in the default VLAN 1. Unfortunately I wasnīt able to find the correct setting  :(

A simple test to just exchange the DGS-1210 against a dumb DGS-1008p made my VoIP config work immediately. So, the DGS-1210 needs some special settings to make VoIP work together with a Fritzbox.

Does anyone of you have a good hint for me?

Bye
Dirk
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FurryNutz

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Re: No VoIP behind DGS-1210-28p with AVM FritzBox
« Reply #1 on: August 13, 2015, 10:53:49 AM »

Is there any information in the User Manual by chance?
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drasche

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Re: No VoIP behind DGS-1210-28p with AVM FritzBox
« Reply #2 on: August 13, 2015, 11:02:24 AM »

Just to update you: I found the error :-)

As I already suggested it was the switch that was preventing my VoIP connection from working. The switch simply is too intelligent.

I set the "DoS Prevention Service" to "Disabled" and immediately my VoIP went online.

Hope this info is of use for anyone.

Have fun
Dirk
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drasche

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Re: No VoIP behind DGS-1210-28p with AVM FritzBox
« Reply #3 on: August 13, 2015, 11:04:00 AM »

Is there any information in the User Manual by chance?

Nope. Read thru it but didnīt find anything.

Found it by try and error ;-)
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FurryNutz

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Re: No VoIP behind DGS-1210-28p with AVM FritzBox
« Reply #4 on: August 13, 2015, 11:05:52 AM »

Glad you found the feature to disable and make it work. I presumed it would be a feature in the switch. I wouldn't have known what to check for. Thanks for posting the information. Ya, Smart switches are abit more complex to use than the dumb ones. LOL.

Enjoy.
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Cable:200mb/10Mb>NetGear C7800>DIR-882>DGS-1100>HP 24pt Gb Switch. COVR-3902/2202/1203,DIR-2680,890L,882,880L,868L,DNR-202L,DNS-345x2,DCS-933L,936L and 960L.
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