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

[John Novack]

Tim Nelson wrote:
> Thank you all for the suggestions. I'm looking into getting groundstart lines for that installation as suggested earlier. 
Make sure your interface supports GS
The Sangoma and TDM cards do
I assume you are using one of these as you mention Zaptel.

John Novack

> Also, I'll try setting the outbound call routes in reverse from the inbound hunt group. I appreciate your help!
>
> Tim Nelson
> Systems/Network Support
> Rockbochs Inc.
>
> ----- Original Message -----
> From: "James Texter III" <james.texter at gmail.com>
> To: "Asterisk Users Mailing List - Non-Commercial Discussion" <asterisk-users at lists.digium.com>
> Sent: Thursday, February 28, 2008 8:47:37 AM (GMT-0600) America/Chicago
> Subject: Re: [asterisk-users] Simultaneous Inbound and Outbound calls on analog lines...
>
> 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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