[asterisk-users] Simultaneous Inbound and Outbound calls on analog lines...

[James Texter III]

In the telephony world, this is called glare, it's most prevalent on  
Analog (though you can have the same thing happen with robbed-bit  
T1).  There really isn't much you can do to prevent it, only minimize  
it.  You need to have your inbound and outbound starting at opposite  
ends.  If your incoming calls are coming top down, then you need to  
use G<your group number> in your Dial app so that outbound calls go  
bottom up, or vice versa.

HTH,

James Texter

On Feb 27, 2008, at 2:55 PM, Tim Nelson wrote:

> Hello! I've run into a problem where a user is making an outbound  
> call at the same time that an inbound call is being made on the same  
> analog line. It appears that as the zap channel is opened for the  
> outbound call, it is simply answering the inbound call. Obviously,  
> both parties involved in the calling get a bit confused. Previously,  
> it happened only on an occasional basis. However, as this  
> installation gets more and more use, we are finding it happens more  
> often. How can this situation be prevented? Shouldn't zaptel see an  
> incoming call and simply choose another trunk? We are running  
> Asterisk 1.2.12.1 and Zaptel 1.2.22.1. Any ideas?!?
>
> Tim Nelson
> Systems/Network Support
> Rockbochs Inc.
>
>
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