[asterisk-users] Rusting Snoms?

[Tim Panton]

It isn't POE - its using the original power brick that came with the  
phone.

Swapping to a dumb hub (without uplink-autosensing) seems to fix it.

Would a firmware upgrade (from 3,56m 6154) help ?

Tim.

On 19 May 2009, at 13:28, Christian Stredicke wrote:

> With cheap PoE devices Ethernet can easily get "on the edge" - or  
> over the edge. If you have another switch/different model, a quick  
> try will help isolating the problem.
>
> CS
>
> -----Ursprüngliche Nachricht-----
> Von: Tim Panton [mailto:thp at westhawk.co.uk]
> Gesendet: Dienstag, 19. Mai 2009 13:46
> An: Asterisk Users Mailing List - Non-Commercial Discussion;  
> Christian Stredicke
> Betreff: Re: [asterisk-users] Rusting Snoms?
>
> On further investigation - it may well be that the switch doesn't like
> the phones (or vice-versa)
> I tried daisy-chaining one phone off the second port of the other and
> got distinctly better audio.
>
> It's a new netgear fvs 318 with autosensing 100/10 ports.
>
> Any clues ?
>
> Thanks.
> Tim
>
> On 9 May 2009, at 11:04, Christian Stredicke wrote:
>
>> Because the phone is a digital system, I would suspect that it is a
>> problem with the switch. Run a quick PCAP trace to see where the
>> jitter comes from. Depending on the firmware version, you can do
>> that from the web interface.
>>
>> CS
>>
>> -----Ursprüngliche Nachricht-----
>> Von: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-bounces at lists.digium.com
>> ] Im Auftrag von Tim Panton
>> Gesendet: Samstag, 9. Mai 2009 11:46
>> An: Asterisk Users Mailing List - Non-Commercial Discussion
>> Betreff: [asterisk-users] Rusting Snoms?
>>
>> This is a bit off topic, because I 'think' it isn't an Asterisk
>> problem.
>> However I'm not sure and anyhow I'm hoping someone may recognize the
>> symptom.
>>
>> We moved offices a month ago. Our trusty SNOM190s (all between 3 and
>> 5 years old) were packed up for the move, then unpacked a couple of
>> weeks later.
>>
>> On unpacking them and connecting them to the new network, several of
>> them didn't work well. The symptom is that outgoing RTP audio is
>> garbled - like the packets are pulsed. Inbound is fine. This isn't
>> true for all of the phones, just some of them. (The all run the same
>> SNOM firmware)
>>
>> To be fair, they are on a new network, so it could be the cables or
>> new 1Gb switches, except that the problem moves with the phone if
>> you relocate it from one desk to another.
>>
>> I've tried a fresh asterisk install, but that didn't help either.
>>
>> So I am forced to conclude that something went 'bad' in those
>> (old) phones while they were switched off. Has anyone got any clues
>> for me?
>>
>> Thanks!
>>
>> Tim.
>>
>> Tim Panton - Web/VoIP consultant and implementor www.westhawk.co.uk
>>
>>
>>
>>
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>
> Tim Panton - Web/VoIP consultant and implementor
> www.westhawk.co.uk
>
>
>

Tim Panton - Web/VoIP consultant and implementor
www.westhawk.co.uk



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