[Asterisk-Users] Freak incidents, who's to blame?

[Ryan Courtnage]

On 3-May-05, at 9:16 PM, Henry Devito wrote:

> Nortel and Toshiba and so on help eliminate this by routing  
> outgoing calls starting from the highest trunk backwards and  
> incoming calls of course start from the lowest trunk and work upward.

Thanks for everyone's feedback on this.

Just to add closure to the discussion, Zap channel groups support  
this "hunting" by use of a group number prefix in the dial cmd:
http://voip-info.org/wiki-Asterisk+ZAP+channels

Dial(Zap/g2...): Looks in order 1, 2, 5, 8
Dial(Zap/G2...): Looks in order 8, 5, 2, 1
Dial(Zap/r2...): Looks in order 8, 1, 2, 5
Dial(Zap/R2...): Looks in order 2, 1, 8, 5

(I was previously only aware of "g").

Thanks
Ryan


>>
>>> Ryan Courtnage wrote:
>>>
>>>
>>>> Hello all,
>>>> Everyone has probably experienced this at some point in the past:
>>>> You pick up your analog phone.  Rather than hearing dialtone,  
>>>> you  are connected with someone who has just called you.   
>>>> Neither you  nor them heard a ring.
>>>> Maybe it's just me, but it seems these "freak incidents" would   
>>>> occur more frequently years ago, than now.
>>>> I've now experienced this a couple of times with an * system  
>>>> (TDM400p  - quad FXO):
>>>> A SIP exten dials digits which are answered by a Zap trunk.  As   
>>>> soon as Zap answers, the SIP extension is connected with an   
>>>> inbound (PSTN) caller (who was expecting to hear an IVR).
>>>> My questions are:  Who's to blame (telco, tdm card, * config,  
>>>> gremlins)?  Is this avoidable?
>>>>
>>>>
>>>
>>> It's called "glare".
>>>