[Asterisk-Users] Lower cost router suitable for VOIP ?

[John Howard]

One thing I will say is that my test environment isn’t exactly huge, I'm
using Asterisk with 2 x100p's (PSTN access) and voiptalk here in the UK.
They offer an IAX2 trunk -> PSTN gateway service.  I also have a voiptalk
SIP account that I test with as well.

I have tried a few other adsl routers before I tried this, namely a Solwise
SAR715 ADSL Router and an OEM Connexant DSL pile of filth.  Neither would
work at all with SIP or the IAX2 stuff.  I have also had issues with
iptables that I wish to never have to think about again!

Since installing this Zyxel DSL router I have had pretty much no problems at
all.  The Bandwidth shaping is basic but consequently quite simple.

It has SIP, FTP and h.323 as preconfigured profiles that require nothing
more than a source and/or destination address, priority and amount of
bandwidth to allocate.  Other protocols require port number and protocol
type as you'd expect.

If configured to share root bandwidth among classes then it will happily
allow browsing and leeching at full speed, but when you make a call there
will be a near instant drop in download speeds elsewhere.  I allocated
176kbps to port 4569 udp (IAX2) and found that using the voiptalk service
was fine.  I'm having a few ATM issues with our dsl here that didn’t help
testing earlier today, but when the dsl is behaving itself, using the voip
is certainly no different to using the pstn over asterisk.  Both methods are
using gsm as the default codec right now.  There was the occasional defect
in the voice I will admit, but that just the odd bit of packet loss I think.

jd

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Adam Goryachev
Sent: 07 September 2004 13:13
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: RE: [Asterisk-Users] Lower cost router suitable for VOIP ?

On Tue, 2004-09-07 at 21:20, John Howard wrote:
> I'm using the Zyxel 660H-61 with fantastic results.
> 
> It supports SIP out of the box, and ive been able to set up the bandwidth
> shaping for SIP (it supports this natively), and iax2 as well.
> 
> It cost be about £60 GBP.
> 
> Well worth the month I think...

Can you tell us more about this, specifically I am interested in it's
capabilities to deal with different traffic scenarios while trying to
hold a conversation.

ie, conversation quality during large upload and during large download.
Also, what is the reduction in overall download/upload speed while you
are on a call, compared to while no call is in progress.

Thanks,
Adam

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