Posted: Thu Jan 20, 2000 12:00 am Post subject: [Asterisk] RE: Low Budget system
I hit the web page, and I'm interested in helping out with a low
budget system. I'm not a hardware person, but I'm an average C
programmer, and have been doing a lot with C++. My target would be a
analog system, 2 inputs and 4 extensions. Ring generation is a must for
the extensions. Voice mail would be a plus, but not neccesary.
--
-----------------------------
Jon 'the maddman' Frederick
-----------------------------
Posted: Thu Jan 20, 2000 12:16 am Post subject: [Asterisk] RE: Low Budget system
Quote:
I hit the web page, and I'm interested in helping out with a low
budget system. I'm not a hardware person, but I'm an average C
Out of curiosity, what does the list htink is a low budget
system?
Greg
/********************************************************************
Greg Herlein Quicknet Technologies, Inc.
Member of Technical Staff 415-864-5225 x541
gherlein@quicknet.nethttp://www.quicknet.net
*********************************************************************/
Posted: Thu Jan 20, 2000 12:38 am Post subject: [Asterisk] RE: Low Budget system
There is a thread in the archives about designing a home-brew system.
That's what I'm thinking of. Does anyone know what the bell standing
would be if the computer isolated their lines from the extensions? If
we handled the incoming lines with a voice modem or something, would
they care that the internal stuff isn't certified?
I only know a little about how the phone systems work, but there is no
way I could afford a T1 to play with.
Greg Herlein wrote:
Quote:
> I hit the web page, and I'm interested in helping out with a low
> budget system. I'm not a hardware person, but I'm an average C
Out of curiosity, what does the list htink is a low budget
system?
Greg
/********************************************************************
Greg Herlein Quicknet Technologies, Inc.
Member of Technical Staff 415-864-5225 x541
gherlein@quicknet.nethttp://www.quicknet.net
*********************************************************************/
--
-----------------------------
Jon 'the maddman' Frederick
-----------------------------
Posted: Thu Jan 20, 2000 12:46 am Post subject: [Asterisk] RE: Low Budget system
On Wed, 19 Jan 2000, Jon Frederick wrote:
Quote:
There is a thread in the archives about designing a home-brew system.
That's what I'm thinking of. Does anyone know what the bell standing
would be if the computer isolated their lines from the extensions? If
we handled the incoming lines with a voice modem or something, would
they care that the internal stuff isn't certified?
I only know a little about how the phone systems work, but there is no
way I could afford a T1 to play with.
As long any connection to MaBell's pairs is via a part61 approved device,
its all good.
Posted: Thu Jan 20, 2000 12:57 am Post subject: [Asterisk] RE: Low Budget system
On Wed, 19 Jan 2000, Jon Frederick wrote:
Quote:
I hit the web page, and I'm interested in helping out with a low
budget system. I'm not a hardware person, but I'm an average C
programmer, and have been doing a lot with C++. My target would be a
analog system, 2 inputs and 4 extensions. Ring generation is a must for
the extensions. Voice mail would be a plus, but not neccesary.
It seems we have plenty of programmers now all we need are real
hardware + telecomms people. Mmm, this year I'm doing a couple of
electronics courses (from an electrotechnology degree, I'm doing them
as electives for the business computing degree I'm doing), maybe I
could have a talk with some of the people that are running the
courses (lecturers etc).
Posted: Thu Jan 20, 2000 1:02 am Post subject: [Asterisk] RE: Low Budget system
We have a 3com NBX 100 pbx system and it simply has analog line cards to
interface the analog PSTN lines. The handsets are ethernet. This sounds
like a similar setup as the modem isolation.
Matt
Jon Frederick wrote:
Quote:
There is a thread in the archives about designing a home-brew system.
That's what I'm thinking of. Does anyone know what the bell standing
would be if the computer isolated their lines from the extensions? If
we handled the incoming lines with a voice modem or something, would
they care that the internal stuff isn't certified?
I only know a little about how the phone systems work, but there is no
way I could afford a T1 to play with.
Greg Herlein wrote:
>
> > I hit the web page, and I'm interested in helping out with a low
> > budget system. I'm not a hardware person, but I'm an average C
>
> Out of curiosity, what does the list htink is a low budget
> system?
>
> Greg
>
> /********************************************************************
> Greg Herlein Quicknet Technologies, Inc.
> Member of Technical Staff 415-864-5225 x541
> gherlein@quicknet.nethttp://www.quicknet.net
> *********************************************************************/
--
-----------------------------
Jon 'the maddman' Frederick
-----------------------------
Posted: Thu Jan 20, 2000 12:36 pm Post subject: [Asterisk] RE: Low Budget system
I think you'll be fine - on the aforementioned line cards (I work in the NBX100
team, although not on those cards), it's my understanding that we're allowed to
completely alter the DSP code without re-homologation, which seems to be
concerned purely with the hardware (i.e., they don't care unless you're going to
blow up their equipment).
Hamish
Matthew Winther <winther@rni.net> on 01/20/2000 01:02:41 AM
To: asterisk@marko.net
cc: (Hamish Allan/GB/3Com)
Subject: Re: [Asterisk] RE: Low Budget system
We have a 3com NBX 100 pbx system and it simply has analog line cards to
interface the analog PSTN lines. The handsets are ethernet. This sounds
like a similar setup as the modem isolation.
Matt
Jon Frederick wrote:
Quote:
There is a thread in the archives about designing a home-brew system.
That's what I'm thinking of. Does anyone know what the bell standing
would be if the computer isolated their lines from the extensions? If
we handled the incoming lines with a voice modem or something, would
they care that the internal stuff isn't certified?
I only know a little about how the phone systems work, but there is no
way I could afford a T1 to play with.
Greg Herlein wrote:
>
> > I hit the web page, and I'm interested in helping out with a low
> > budget system. I'm not a hardware person, but I'm an average C
>
> Out of curiosity, what does the list htink is a low budget
> system?
>
> Greg
>
> /********************************************************************
> Greg Herlein Quicknet Technologies, Inc.
> Member of Technical Staff 415-864-5225 x541
> gherlein@quicknet.nethttp://www.quicknet.net
> *********************************************************************/
--
-----------------------------
Jon 'the maddman' Frederick
-----------------------------
Posted: Thu Jan 20, 2000 1:29 pm Post subject: [Asterisk] Re: Low Budget system
Quote:
> I hit the web page, and I'm interested in helping out with a low~
>budget system. I'm not a hardware person, but I'm an average C~
Out of curiosity, what does the list htink is a low budget~
system?~
Something I can start with a ~$200 PC and add say up to four to eight lines
for less that $50 a line.
Posted: Thu Jan 20, 2000 3:44 pm Post subject: [Asterisk] RE: Low Budget system
On Wed, 19 Jan 2000 16:16:28 -0800 (PST), Greg Herlein wrote:
Quote:
> I hit the web page, and I'm interested in helping out with a low
> budget system. I'm not a hardware person, but I'm an average C
Out of curiosity, what does the list htink is a low budget
system?
For me a low budget system is a card ~$200 preferably less that will
interface to 2-4 incoming and switch between 4 - 8 stations. If the
ability was there to add more lines and stations for <$50 I would
probally pay a little more for the initial card. I don't need the
VoIP stuff or conferencing stuff.
Posted: Thu Jan 20, 2000 4:03 pm Post subject: [Asterisk] RE: Low Budget system
On Thu, 20 Jan 2000 13:57:09 +1300 (NZDT), Andrew Gordon wrote:
Quote:
It seems we have plenty of programmers now all we need are real
hardware + telecomms people. Mmm, this year I'm doing a couple of
I am a hardware person but not a teleco person. If I can find the
info I have the facilities to design/layout/and build whatever we
need. BUT I am quite short on time.
So far good info has been a stumbling block of mine. I have found
some info on DAAs (Data Access Arangements, the interface to the
phone line) and I have found at least one chipset that claims to be
linux friendly and appears to have a lot of functionality for what we
need.
What I have found Zero info on so far is interfaceing phone lines to
phonelines using crosspoint switches or whatever. I can't really
move forward until I find some of this info.
What I would kinda like to do is some sort of GPLed hardware design.
That way any manufacturer who wanted to pick up the design and make a
crapload of them for cheap could. Yet any improvements made would
stay available for all.
Quote:
electronics courses (from an electrotechnology degree, I'm doing them
as electives for the business computing degree I'm doing), maybe I
could have a talk with some of the people that are running the
Yeah that would be good. Perhaps some of them could suggest some
good app notes or books that I can get a hold of.
Posted: Thu Jan 20, 2000 4:12 pm Post subject: [Asterisk] Re: Low Budget system
Quote:
Something I can start with a ~$200 PC and add say up to four to eight lines
for less that $50 a line.
If all you need is POTS then you ought to be able to find a
solution. If you need PSTN you may have trouble finding a
solution in that proce range. If you need any DSP you will not
find a solution for that cheap.
Greg
/********************************************************************
Greg Herlein Quicknet Technologies, Inc.
Member of Technical Staff 415-864-5225 x541
gherlein@quicknet.nethttp://www.quicknet.net
*********************************************************************/
Posted: Thu Jan 20, 2000 5:41 pm Post subject: [Asterisk] Re: Low Budget system
On Thu, 20 Jan 2000 08:12:28 -0800 (PST), Greg Herlein wrote:
Quote:
> Something I can start with a ~$200 PC and add say up to four to eight lines
> for less that $50 a line.
>
If all you need is POTS then you ought to be able to find a
solution. If you need PSTN you may have trouble finding a
Please explain the differnce between POTS and PSTN. I know what they
stand for but I kinda thought they were just different names for the
same thing.
Quote:
solution in that proce range. If you need any DSP you will not
find a solution for that cheap.
What kind of DSP power are we talking here? Our rep has been after
us to find a use for that TI $10 dsp. Using that I would think that
the DSP subsystem with D/A A/D could be built for <$50. I just got a
quote on a 4"x6" 4 layer board 50 pices for $53 / board so lest say
$60. Add $50 - $60 of extra stuff. Thats $170, now add assembly $10
- 20 /board.
$180 - $190 per board. Oh.. you want some profit out of it huh? Well
thats different. *grin*
Hows my guess mesh with reality? Did I miss anything that would jack
the price up?
Posted: Thu Jan 20, 2000 5:51 pm Post subject: [Asterisk] Re: Low Budget system
Quote:
Please explain the differnce between POTS and PSTN. I know what they
stand for but I kinda thought they were just different names for the
same thing.
POTS port - what you can plug an analog phone into
- this provides dial tone, ring, etc. It looks like what a
telco CO provides to you on the wall jack.
PSTN port - the reverse of the POTS - ie, the ability to plug
into the telco, go offhook, make calls through the normal system
etc.
Quote:
What kind of DSP power are we talking here? Our rep has been after
us to find a use for that TI $10 dsp. Using that I would think that
the DSP subsystem with D/A A/D could be built for <$50. I just got a
quote on a 4"x6" 4 layer board 50 pices for $53 / board so lest say
$60. Add $50 - $60 of extra stuff. Thats $170, now add assembly $10
- 20 /board.
$180 - $190 per board. Oh.. you want some profit out of it huh? Well
thats different. *grin*
Hows my guess mesh with reality? Did I miss anything that would jack
the price up?
Quicknet sells the Internet PhoneJACK at $159 retail (single unit
pricing). I'd say you are a bit high, but we've had 4+ years to
try to get some cost optimization. :)
Greg
/********************************************************************
Greg Herlein Quicknet Technologies, Inc.
Member of Technical Staff 415-864-5225 x541
gherlein@quicknet.nethttp://www.quicknet.net
*********************************************************************/
Posted: Thu Jan 20, 2000 11:20 pm Post subject: [Asterisk] RE: Low Budget system
Quote:
I am a hardware person but not a teleco person. If I can find the
info I have the facilities to design/layout/and build whatever we
need. BUT I am quite short on time.
I may be able to get access to resources to build what we need in scale,
if we reach that point.
Quote:
So far good info has been a stumbling block of mine. I have found
some info on DAAs (Data Access Arangements, the interface to the
phone line) and I have found at least one chipset that claims to be
linux friendly and appears to have a lot of functionality for what we
need.
Can you provide some pointers to the chipsets you've found?
Quote:
What I have found Zero info on so far is interfaceing phone lines to
phonelines using crosspoint switches or whatever. I can't really
move forward until I find some of this info.
Where does the crosspoint switch come in? Asterisk does the switching in
the PC. We just need to be able to read in the stuff with DMA, I/O, or
whatever.
Posted: Thu Jan 20, 2000 11:57 pm Post subject: [Asterisk] Re: Low Budget system
Looking at the LT-Winmodem page it seems that they might have ring
detection working.... I'll look into it more tonight. I might have to
pick one up to play with.
--
-----------------------------
Jon 'the maddman' Frederick
-----------------------------
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum