[Asterisk-Users] fxo cards

Thu May 22 11:33:37 MST 2003

Dan,

People at Digium will answer this question more precisely, but as far as I
know there is no DSP in hardware and all the work is done by software (like
soft-modems, or winmodems), inside Asterisk and kernel modules. There are
specific routines in Zaptel and Asterisk's DSP doing all jobs: echo
cancelation, voice compression, tone detection, tone generation, callerID
detection ...

Only one correction: X100p is not a 'sound card', but a true 'FXO card'.
There is a builtin line interface in the card, whith DAA, line monitor, and
all stuff like that.

Regards,
-Eduardo

----- Original Message ----- 
From: "Dan" <dtoma at fx.ro>
To: <asterisk-users at lists.digium.com>
Sent: Thursday, May 22, 2003 1:07 PM
Subject: Re: [Asterisk-Users] fxo cards

> Hi Eduardo,
>
> There is some DSP in hardware or just a simple full-duplex sound card?
>
> Thanks,
> Dan
>
> ----- Original Message -----
> From: "Carlos Eduardo Cremon" <ecremon at uol.com.br>
> To: <asterisk-users at lists.digium.com>
> Sent: Thursday, May 22, 2003 6:40 PM
> Subject: Re: [Asterisk-Users] fxo cards
>
>
> > Hi Dan,
> >
> > In terms of hardware, a X100P card is just like a soft-modem, as you
> > observed.
> >
> > In terms of software, the Zaptel core talks directly with X100P hardware
> and
> > this adds more funcionality to Asterisk (e.g. support for conferencing
> > because of timing issue) and has a native full-duplex voice
> implementation.
> >
> > In terms of price, a simple voice modem card is cheaper than X100P but
> > basically has half-duplex-AT_Commands voice implementation, which does
not
> > provide a real FXO implementation.
> >
> >
> > Regards,
> > -Eduardo
> >
> >
> >
> > ----- Original Message -----
> > From: "Dan" <dtoma at fx.ro>
> > To: <asterisk-users at lists.digium.com>
> > Sent: Thursday, May 22, 2003 11:46 AM
> > Subject: Re: [Asterisk-Users] fxo cards
> >
> >
> > > Nope.. just one line (for my home), but what has a X100P card more
than
> a
> > > voice modem in terms of hardware?
> > > I think it is a big difference between X100P and LineJack (in price
> too).
> > > LineJack has the audio codecs includec in hardware. About X100P I know
> > > allmost nothing.
> > > The specification on the web page is so thin that it appears like a
> device
> > > who does.... nothing in the hardware.
> > > I am missing something?
> > > Why to pay 99 USD (plus a lot for transport) and not to use a local
USB
> > > voice modem which is just 20USD?. Just because they are no drivers
> > available
> > > for Asterisk?
> > >
> > > If someone knows more about X100P I kindly ask him to send me that
> > > information too.
> > > I really need a good FXO interface (one port only) and supported by
> > > Asterisk.
> > >
> > > Thanks,
> > > Dan
> > >
> > >
> > > ----- Original Message -----
> > > From: "WipeOut ." <wipeout at linuxmail.org>
> > > To: <asterisk-users at lists.digium.com>
> > > Sent: Thursday, May 22, 2003 5:32 PM
> > > Subject: Re: [Asterisk-Users] fxo cards
> > >
> > >
> > > > If you only want 1 line going into * then you best bet is a X100P
card
> > at
> > > $99.. It will make your life much easier when it comes to the setup..
I
> > > though you wanted multiple lines..
> > > >
> > > > > Hi,
> > > > >
> > > > > > A voice modem is not really an option..
> > > > >
> > > > > Why? I don't want to get an ISDN connection at home only for that.
> > > > > I have a broadband connection at home (cable)... so no need for me
> to
> > > have
> > > > > an ISDN line too...
> > > > > There is any other reason not to use a PCI or USB voice modem as a
> FXO
> > > > > interface?
> > > > > It can be a lot cheaper option for home use.
> > > > >
> > > > > Thanks,
> > > > > Dan
> > > > > ----- Original Message -----
> > > > > From: "WipeOut ." <wipeout at linuxmail.org>
> > > > > To: <asterisk-users at lists.digium.com>
> > > > > Sent: Thursday, May 22, 2003 5:02 PM
> > > > > Subject: Re: [Asterisk-Users] fxo cards
> > > > >
> > > > >
> > > > > > A voice modem is not really an option..
> > > > > >
> > > > > > I am going to attempt to use a passive BRI ISDN card and see
what
> > the
> > > > > performance is like.. Later I will try and add another BRI card so
> > that
> > > I
> > > > > have 4 channels..
> > > > > >
> > > > > > > Hi,
> > > > > > >
> > > > > > > A voice modem (PCI or USB) can be an option?
> > > > > > >
> > > > > > > BR,
> > > > > > > Dan
> > > > > > >
> > > > > > > ----- Original Message -----
> > > > > > > From: "WipeOut ." <wipeout at linuxmail.org>
> > > > > > > To: <asterisk-users at lists.digium.com>
> > > > > > > Sent: Thursday, May 22, 2003 1:24 PM
> > > > > > > Subject: Re: [Asterisk-Users] fxo cards
> > > > > > >
> > > > > > >
> > > > > > > > Sounds like you have the same need I do.. and many others I
am
> > > sure..
> > > > > > > >
> > > > > > > > The only option seems to be the Diva Server ISDN cards but
> they
> > > are
> > > > > very
> > > > > > > expensive.. So it actually works out cheaper to get a E1 or T1
> > card
> > > and
> > > > > the
> > > > > > > line installed than buying the 4 port Diva server card (In the
> UK
> > > > > anyway)..
> > > > > > > >
> > > > > > > > Later..
> > > > > > > >
> > > > > > > > > Hi all,
> > > > > > > > >
> > > > > > > > > Is there any alternative hardware components for multi
port
> > FXO
> > > > > cards,
> > > > > > > other
> > > > > > > > > than Single and E1 or T1 level? For example 4 or 8 port
FXO
> > card
> > > is
> > > > > > > ideal.
> > > > > > > > > Also the price matters.
> > > > > > > > >
> > > > > > > > > Thanks!
> > > > > > > > >
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> > > > >
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> > > >
> > > >
> > >
> > >
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> >
> >
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