[Asterisk-Users] Channel Bank with E1

Steven Critchfield critch at basesys.com
Wed Oct 29 10:29:40 MST 2003 

On Wed, 2003-10-29 at 10:41, Ray Burkholder wrote:
> I can get a hold of a number of refurbished Carrier Access Bank I (T1/FXS)
> units for a pretty respectable price.  Will they do the job based upon your
> comment that they support 'Answer Supervision'?  How about the Caller ID,
> MWI stutter that Asterisk provides?

The stutter tone and is a function of asterisk after a call is connected
to asterisk. It should provide callerid for FXS ports. It has been
mentioned here before that the ring generator is easily damaged, and
those cheap AB1's may be damaged. This happened to us. We bought a
inexpensive AB1 off of eBay and the ring generator was nonfunctional. 

Just make sure you have a way of testing them before you can not return
them.

> > -----Original Message-----
> > From: asterisk-users-admin at lists.digium.com 
> > [mailto:asterisk-users-admin at lists.digium.com] On Behalf Of 
> > Asterisk online forums
> > Sent: October 29, 2003 09:37
> > To: asterisk-users at lists.digium.com
> > Subject: Re: [Asterisk-Users] Channel Bank with E1
> > 
> > 
> > Sergi,
> > 
> > I would say it depends of your budget. You can find on market 
> > different
> > channel banks. Some of them are very expensive and have all 
> > fancy features,
> > some of them are not so expensive and of course are missing 
> > some features.
> > We are using CAC and New Bridge chanell banks, they are 
> > working good and no
> > problem.
> > 
> > When you are looking for channel bank, make sure it supports Answer
> > supervision, it is very important feature. But I don't know 
> > what exactly are
> > you going to do within your netowrk for 100 phones..  Do they need all
> > features to be trasmitted like Calle ID , from outside world ?
> > Also you can take a look into Adtran or NewBridge. IF you 
> > have more specific
> > questions about them, please let me know.
> > 
> > Thanks,
> > Alexander
> > 
> > 
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> > 
> > 
> > 
> > 
> > ----- Original Message ----- 
> > From: "Sergio Serrano Revuelto" <sergio.serrano at avanzada7.com>
> > To: <asterisk-users at lists.digium.com>
> > Sent: Wednesday, October 29, 2003 8:44 AM
> > Subject: [Asterisk-Users] Channel Bank with E1
> > 
> > 
> > I need connect up to 100 analog phone to a H.323 network through *. I
> > think use TE410P, But I need to know what channel bank is 
> > better. I use
> > E1 lines
> > 
> > Any idea?
> > 
> > Thanks in advance,
> > srsergio
> > 
> > 
> > -----Mensaje original-----
> > De: asterisk-users-admin at lists.digium.com
> > [mailto:asterisk-users-admin at lists.digium.com] En nombre de DUSTIN
> > WILDES
> > Enviado el: miércoles, 29 de octubre de 2003 14:30
> > Para: asterisk-users at lists.digium.com
> > Asunto: RE: [Asterisk-Users] Answering Machine Detection
> > 
> > 
> > Thanks for all the info!
> > So I take it I would need to either build an additional APP 
> > to asterisk
> > like (voice_detection) or into an AGI and have that application or AGI
> > run after the call is Answered?
> > 
> > Fortunately it's not a telemarketing system!  :-)
> > It's an appointment reminder system for some of our employees.  Calls
> > them up and reminds them of important tasks like meetings and stuff.
> > 
> > 
> > 
> > 
> > -----Original Message-----
> > From: Michiel Betel [mailto:michiel at betel.nl]
> > Sent: Wednesday, October 29, 2003 8:11 AM
> > To: asterisk-users at lists.digium.com
> > Subject: RE: [Asterisk-Users] Answering Machine Detection
> > 
> > 
> > See
> > http://resource.intel.com/telecom/support/documentation/unix/S
> > R50_linux/
> > html
> > _files/vox_feat/contents.html#TopOfPage chapter 2 for a basic 
> > insight on
> > Dialogic does it...
> > 
> > -----Original Message-----
> > From: asterisk-users-admin at lists.digium.com
> > [mailto:asterisk-users-admin at lists.digium.com] On Behalf Of 
> > Eric Wieling
> > Sent: woensdag 29 oktober 2003 3:12
> > To: asterisk-users at lists.digium.com
> > Subject: Re: [Asterisk-Users] Answering Machine Detection
> > 
> > 
> > Humans tend to say "Hello?" (short burst of audio followed by 
> > silence),
> > and answering machines tend to say "I'm sorry I'm not here right now,
> > please leave a message after the beep" (long burst of audio 
> > followed by
> > a beep and silence).
> > 
> > So, basically you need to decide 1) what is audio and what is 
> > background
> > noise and 2) how long should there be audio followed by silence.
> > 
> > On Tue, 2003-10-28 at 19:25, Alastair Maw wrote:
> > > On 27/10/03 21:57, DUSTIN WILDES wrote:
> > > > Does anyone have any recommendations on implementing Answering
> > > > Machine detection for call generation programs?
> > >
> > > There's obviously no nice way of doing this.
> > > If you're doing telemarketing, and you're playing 
> > pre-recorded audio,
> > > which of course is a nasty thing to do, the algorithm is something
> > > like:
> > >
> > > 1. Dial out.
> > > 2. Wait for answer.
> > > 3. Start playing audio.
> > > 4. If you hear something that sounds like a beep, either hang up
> > >     and try again later, or stop the audio, pause for two seconds
> > >     and start playing it again.
> > > 5. Hang up when finished playing audio.
> > >
> > > Step 4 is accomplished by doing a FFT on the incoming audio into
> > > frequency buckets and taking a rolling average of the mean and
> > > standard deviation, such that you can detect when a fixed monotone
> > > beep occurs at the other end.
> > >
> > >
> > > If you don't want to play audio files and wait for beeps, 
> > and want to
> > > connect real humans to each other, then there's no decent way to do
> > > this, as the only difference between humans and arbitrary answering
> > > machines is that the answering machines give you a beep prompt to
> > > record your message.
> > >
> > > Regards,
> > -- 
> > Sample configs, scripts, more : http://www.fnords.org/~eric/asterisk/
> > 
> > BTEL Consulting 504-899-1387 or 850-484-4545 or 877-677-9643
> > 
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-- 
Steven Critchfield  <critch at basesys.com>

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