[Asterisk-Users] Channel Bank with E1

Wed Oct 29 09:41:27 MST 2003

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?

Regards,
Ray Burkholder

> -----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,
> -- 
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> 
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