[Asterisk-Users] HT-488 vs. SPA-3000?

[Rich Adamson]

The majority of the audio level issues seem to be on the fxo port
and setting the transmission levels (gain) to compensate for the 
cable loss to the central office. Eg, setting the pstn gain values
to what should be appropriate causes echo, etc, not unlike the TDM
card. (I have both in use.)

In other words, the further the spa3000 (or TDM card) is from the
central office, the more difficult it seems to be to set gain values
that are acceptable. That's apparently why many people find its use
is okay while others seem to think its objectionable.

------------------------
> We have 6 SPA3000s.  The device is extremely configurable and works inbound/outbound with 
Asterisk with the latest firmware update with little trouble.  However, we've yet to resolve 
sound volume and quality issues.  The PSTN to SPA gain and SPA to PSTN gain along with FXS Port 
Input Gain and Output Gain settings have had no positive effect.  The problem is entirely with 
the analog line adapter.  VoIP calls from the analog phone to other VoIP destinations are 
perfect.  We also have several SPA-1001s and SPA-2000s that have been running perfect since day 
1.
> 
> Also Sipura support is nonexistant.  Just our experience.
> 
> 
> -----Original Message-----
> From: asterisk-users-bounces at lists.digium.com
> [mailto:asterisk-users-bounces at lists.digium.com]On Behalf Of Dan
> Littlejohn
> Sent: Wednesday, June 15, 2005 9:55 AM
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: Re: [Asterisk-Users] HT-488 vs. SPA-3000?
> 
> 
> I have only had experience with the Sipura 3000 and I would agree with
> the voice volume problems.  I have given up on it working properly
> (adjusted gains, impedences, firmware, etc), the voice quality is just
> to low to actually use.  I actually purchased a second one thinking
> that the first might be defective.
> 
> Would not recommend it because of the low sound volume problem. 
> Talking on the phone is actually the point of the device so who cares
> how configurable it is if you cannot hear anything.  I purchased a
> Digium TDM400P and have had very good luck with it.
> 
> Dan
> 
> On 6/15/05, Rich Adamson <radamson at routers.com> wrote:
> > > Just want to tap the collective wisdom of this list as to experiences
> > > pertaining to the Handytone HT488 and the Sipura SPA-3000 adapters...
> > 
> > I've not played with the ht488, but I believe others have posted this
> > device does not provide access to the pstn-fxo port. The spa3k does
> > provide that access (if you want it).
> > 
> > > Basically I'm looking for a FXO/FXS/LAN ATA and these two seems to be
> > > the top of the pick..Any comments and experiences esp. with Asterisk
> > > compatibility would be great, before I plonk in the bucks.
> > 
> > The spa3k works fine with asterisk as many have posted. However, once
> > in awhile it does act a little strange in two different ways:
> >  1. the spa3k will sometimes interpret some voices as tones which cause
> >  a little disturbance to any conversation going on. It is sort of like
> >  the old telephony "talk off" that existed years ago. Doesn't happen
> >  all that often and seems to be more sensitive to female voices based
> >  on my one-year of experience.
> >  2. sometimes it seems to operate in half-duplex mode, where if you try
> >  to talk at the same time as the other end is talking, the other end
> >  won't hear you.
> > 
> > Neither one of those have been all that objectionable to me, but they
> > happen and others have posted roughly the same issues. I've not heard
> > of anyone that has found a way to minimize those two issues.
> > 
> > The down side of the spa3k right now is that Cisco bought the company
> > and there likely won't be much advancement of the code until after the
> > ownership (and development efforts) are sorted out by both companies.
> > (The same kind of product delays has been seen with their Linksys
> > purchase, as well as when other companies are bought/sold.)
> > 
> > Its fairly common knowledge that ex-Cisco folks started Sipura for the
> > sole purpose of selling the company for a hugh profit. Their success
> > in accomplishing that objective could only be measured in terms of
> > producing Sipura products that had at least some acceptance of those
> > products by end users. With those previous objectives accomplished,
> > how will Cisco handle the Sipura products in the future? (It's any-
> > one's guess at this point since Cisco also has at least some track
> > record of mismanaging purchased companies for whatever reason.)
> > 
> > >From an internal Cisco strategic perspective, they now own the assets
> > that can make a major dent in the mass-market end-user voip product
> > arena, and hopefully they'll take that in a positive direction.
> > 
> > Given the price of the spa3k, I don't have any issue with purchasing
> > more of them right now. Excellent choice for the one-to-three pstn-fxo
> > market space.
> > 
> > 
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