[Asterisk-Users] Channel Bank with E1

[Jeremy McNamara]

Use a T-1 channel bank and a E-1 telco circuit. This is the exact reason 
why Digium built the TE410P.


Jeremy McNamara




Sergio Serrano Revuelto wrote:

>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/SR50_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,
>>    
>>