[Asterisk-Users] Re: Strange Problem

[Adam Goryachev]

On some telco systems, the person who makes the call is the only one who
can 'release' the call. As such, even if the callee (person who was
called) hangs up, and then picks up again (say minutes later) the caller
will still be on the line. As soon as the caller hangs up, both ends are
dis-connected. This is the way it used to work here in Australia, I
don't know if it still does. 

If one end is on a digital line, and it hangs up, it will disconnect the
call, regardless of whether it initiated the call or not. (AFAIK).

Regards,
Adam

On Sat, 2004-03-13 at 14:00, Asterisk Learner wrote:
> -----Original Message-----
> From: asterisk-users-admin at lists.digium.com
> [mailto:asterisk-users-admin at lists.digium.com] On Behalf Of Stephen R.
> Besch
> Sent: Saturday, March 13, 2004 12:19 AM
> To: asterisk-users at lists.digium.com
> Subject: [Asterisk-Users] Re: Strange Problem
> 
> Asterisk Learner wrote:
> >> 
> >> 
> >> I am experiencing a strange problem and wanted to know if someone has
> 
> >> faced any similar issues or could provide me with a way to counter
> this 
> >> problem. I am in the process of experimenting with asterisk and
> trying 
> >> to setup a basic functional system. I have one TDM400P (single port)
> and 
> >> one X100P. I am using one analog phone connected to the TDM400P and I
> 
> >> also have a couple of Xlite SIP phones configured. I can make calls
> out 
> >> to the PSTN and I can also receive calls.
> >> 
> >>  
> >> 
> >> The problem happens when someone from the outside (PSTN) calls the 
> >> Asterisk box. I have asterisk configured to forward the call to Zap/2
> 
> >> (analog phone). Zap/2 rings and I can talk to the person on the other
> 
> >> end but if I hang up first then the other end does not see as the
> call 
> >> being hung up. Asterisk CLI shows that Zap/1-1 (FXO) hungup but for
> some 
> >> reason the other end thinks that the call is still up and does not 
> >> disconnect unless the person hangs up himself. The confusing part is 
> >> that if I initiate the call then this problem does not happen.
> >> 
> >>  
> >> 
> >> Can someone tell me what is happening and how to resolve this issue?
> >> 
> >>  
> >> 
> >> Thanks
> >> 
> >  
> >
> >On analog lines, the central ofice switch will signal that the remote 
> >end hung up the call, if I recall correctly, either by dropping loop 
> >current or using a brief polarity reversal. There may be other means as
> 
> >well.  You need to make sure that you are using the correct settings to
> 
> >sense this properly.
> 
> I am not seeing the problem when the remote side hangs up. I apologize
> if my description of the problem was vague. I will have another go at
> it. The problem happens when someone from the outside calls my asterisk
> box and I pick up the analog phone (attached to the TDM400P) and then
> hang up from the inside. The problem DOES NOT happen when I call from
> the inside to outside and hang up from the inside. I believe in both
> cases Asterisk is responsible for releasing the line as in both cases
> the inside is hanging up.
> 
> >The reason you don't see this when you place the call is that, 
> >obviously, your end has no trouble determining when you have hung up, 
> >regardless of setting that affect the detection of the remote end 
> >hanging up.
> 
> >Stephen R. Besch
> 
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