[Asterisk-Users] Re: Benjk's Question "Why FXS"

2004-10-29 Thread Stephen R. Besch
Andrew Kohlsmith wrote:

IP Phones require massive rewiring of your network infrastructure -- throwing 
those phones with the built-in switches in the mix is just asking for 
trouble.

-A.
I agree - if you are have a hub based architecture. But not if you are 
using switches. And, sharing existing ports using a small 4-port switch 
(maybe 40 bucks or less) you don't even need much extra wiring. The 
packet traffic level from an IP phone is just not enough to be of any 
concern unless you are moving gigs of data simultaneously over the same 
shared port.

Stephen R. Besch
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[Asterisk-Users] Re: Benjk's Question "Why FXS"

2004-10-29 Thread Stephen R. Besch
Wolf Paul wrote:
How about a school strapped for cash, with around 60 POTS phones on
hand and an almost free source of another 60? Versus a cost (here in
Austria) of $99 for the cheapest VoIP phone (the cheapest Grandstream
model). Of course that also means that FXS is only of interest if
I can get it for under around $50-60/port -- if things cost more it
becomes easier to argue early replacement of these POTS phones by IP 
phones.
For that many analog phones, you probably want something like a channel 
bank(s), which can handle the both FXS and FXO lines and package them 
into T1's. These are pricey new, but if you have the flexibility - and 
many school financial officers frown on buying used or surplus equipment 
- you can get them on e-bay quite reasonably with a little effort. I was 
able to get my FXS/FXO cards (4 port) for about $25.00 (US) per analog 
line and a virtually new TSU-600 for $99.00.

Stephen R. Besch
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Re: [Asterisk-Users] Re: Benjk's Question "Why FXS"

2004-10-26 Thread Kevin P. Fleming
Harry McGregor wrote:
I would love to see a good cheap phone with 802.3af, but they have yet
to come out.  We have been looking at the Zip 4x4, as it's about the
best of the lot.  We tried to look at the UIP200, but it was not even
readily available.
The Polycom SoundPoint IP300 is around $130 and with the addition of 
their "splitter" cable can do 802.3af, but I don't know what the 
splitter costs. If it's $20, that's a pretty good phone for $150, 
remotely-powered.
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RE: [Asterisk-Users] Re: Benjk's Question "Why FXS"

2004-10-26 Thread Harry McGregor
On Mon, 2004-10-25 at 16:15, Reid A. Forrest wrote:

> I may be wrong, but from what I've seen so far, an FXS port will run you
> about $100/port anyway, plus the cost of the analog device. At this price, I
> can't see any reason not to dump the analog and go with a cheap VOIP device.
> Even the lowest end (i.e. Grandstream) will give you more functionality than
> most analog phones at the same price. Now if you have a source for cheap or
> free channel banks, that's another story.

The cheapest VoIP phone won't get you PoE.  I expect my phones to be
powered when the AC power is out.

The only way to do that is with PoE or FXS and channel banks, and good
UPS in your closet.  Putting a UPS on each user's Grandstream just is
not effective.

Anyone that does not include power calculations in the VoIP projects is
not doing their homework.

I would love to see a good cheap phone with 802.3af, but they have yet
to come out.  We have been looking at the Zip 4x4, as it's about the
best of the lot.  We tried to look at the UIP200, but it was not even
readily available.

I could go for a $100 granstream with PoE VS a $65 Grandstream without
it.

Harry
 
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University of Arizona - Environment and Natural Resource Building
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University of Arizona or the U.S. Geological Survey.

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Re: [Asterisk-Users] Re: Benjk's Question "Why FXS"

2004-10-25 Thread James H. Thompson
Reid A. Forrest <[EMAIL PROTECTED]> wrote:
>> -Original Message-
>> From: [EMAIL PROTECTED]
>> [mailto:[EMAIL PROTECTED] On Behalf Of
>> James H. Thompson
>> 
>> Sipura 200 ATA is $40/port
>> Linksys PAP2-NA is $25/port
>> 
> 
> You're correct, I was looking at prices of _new_ channel banks
> instead of these devices. At $25 or $40 per port it could make sense
> to use FXS instead of VoIP. I haven't really followed the Linksys
> products; is the PAP2-NA commercially available unlocked? I thought
> they only sold these locked to Vonage.
> 

LInksys has restricted sales of the unlocked versions to "Service Providers".
Instructions and more info here:
http://www.voip-info.org/tiki-index.php?page=Linksys



Jim

James H. Thompson
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RE: [Asterisk-Users] Re: Benjk's Question "Why FXS"

2004-10-25 Thread Reid A. Forrest
 

> -Original Message-
> From: [EMAIL PROTECTED] 
> [mailto:[EMAIL PROTECTED] On Behalf Of 
> James H. Thompson
> 
> Sipura 200 ATA is $40/port
> Linksys PAP2-NA is $25/port 
> 

You're correct, I was looking at prices of _new_ channel banks instead of
these devices. At $25 or $40 per port it could make sense to use FXS instead
of VoIP. I haven't really followed the Linksys products; is the PAP2-NA
commercially available unlocked? I thought they only sold these locked to
Vonage.

As another poster suggested, channel banks can be had for cheap on eBay, but
I generally don't consider used equipment on eBay a source most businesses
would look to.
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Re: [Asterisk-Users] Re: Benjk's Question "Why FXS"

2004-10-25 Thread James H. Thompson
Reid A. Forrest <[EMAIL PROTECTED]> wrote:
> 
> I may be wrong, but from what I've seen so far, an FXS port will run
> you about $100/port anyway, plus the cost of the analog device. At
> this price, I can't see any reason not to dump the analog and go with
> a cheap VOIP device. Even the lowest end (i.e. Grandstream) will give
> you more functionality than most analog phones at the same price. Now
> if you have a source for cheap or free channel banks, that's another
> story. ___

Sipura 200 ATA is $40/port
Linksys PAP2-NA is $25/port 



Jim

James H. Thompson
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Re: [Asterisk-Users] Re: Benjk's Question "Why FXS"

2004-10-25 Thread Andrew Kohlsmith
On October 25, 2004 07:15 pm, Reid A. Forrest wrote:
> I may be wrong, but from what I've seen so far, an FXS port will run you
> about $100/port anyway, plus the cost of the analog device. At this price,
> I can't see any reason not to dump the analog and go with a cheap VOIP
> device. Even the lowest end (i.e. Grandstream) will give you more
> functionality than most analog phones at the same price. Now if you have a
> source for cheap or free channel banks, that's another story.

You are clearly smoking something.  Adit600 fully loaded (48 FXS) off ebay for 
US$500.  That's about $11/port, plus the cost of any old phone.  Hell throw 
in a pair of T100Ps and it's STILL $32/port.

IP Phones require massive rewiring of your network infrastructure -- throwing 
those phones with the built-in switches in the mix is just asking for 
trouble.

-A.
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RE: [Asterisk-Users] Re: Benjk's Question "Why FXS"

2004-10-25 Thread Reid A. Forrest
 

> -Original Message-
> From: [EMAIL PROTECTED] 
> [mailto:[EMAIL PROTECTED] On Behalf Of 
> Wolf Paul
> Sent: Monday, October 25, 2004 6:34 PM
> To: [EMAIL PROTECTED]
> Subject: [Asterisk-Users] Re: Benjk's Question "Why FXS"
> 
> How about a school strapped for cash, with around 60 POTS phones on
> hand and an almost free source of another 60? Versus a cost (here in
> Austria) of $99 for the cheapest VoIP phone (the cheapest Grandstream
> model). Of course that also means that FXS is only of interest if
> I can get it for under around $50-60/port -- if things cost more it
> becomes easier to argue early replacement of these POTS 
> phones by IP phones.
> 
> 

I may be wrong, but from what I've seen so far, an FXS port will run you
about $100/port anyway, plus the cost of the analog device. At this price, I
can't see any reason not to dump the analog and go with a cheap VOIP device.
Even the lowest end (i.e. Grandstream) will give you more functionality than
most analog phones at the same price. Now if you have a source for cheap or
free channel banks, that's another story.
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[Asterisk-Users] Re: Benjk's Question "Why FXS"

2004-10-25 Thread Wolf Paul
How about a school strapped for cash, with around 60 POTS phones on
hand and an almost free source of another 60? Versus a cost (here in
Austria) of $99 for the cheapest VoIP phone (the cheapest Grandstream
model). Of course that also means that FXS is only of interest if
I can get it for under around $50-60/port -- if things cost more it
becomes easier to argue early replacement of these POTS phones by IP phones.
Benjamin on Asterisk Mailing Lists <[EMAIL PROTECTED]> writes, 

I don't really understand the obsession with FXS devices.
The only uses I see for FXS are
- connect a FAX machine, where FAX may not be the best application for
VoIP anyway,
- connect an existing cordless phone, where you probably have only one
such device and a Grandstream HT286 will just do fine,
- connect the analog phone in a hotel to a travel adapter, IAXy would
seem to be the best choice here because you are so much more likely to
encounter NAT traversal problems and other obstacles that you may not
be able to resolve with a SIP device,
- feed some Internet based phone services into a legacy PBX that wants
to see them as CO lines, here again, depending on the number of feeds,
HT286 may be cheap and cheerful enough.
For anything else IP phones should be the default with no buts and no
ifs. I am always puzzled by how people desperately hang on to legacy
stuff they don't really need and in the process create a beast of a
kludge technology. The x86 architecture (or lack thereof) should be an
example that serves to show how not to design your stuff with legacy
support as your all-overriding number one priority. So, let's not make
the same mistake with VoIP. Let's get rid of analog phones as fast and
forcefully as we possibly can.
In other words, FXS should be the very very last resort when there is
really no other way.
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