[Users] check if transaction exists

[Bogdan-Andrei Iancu]

Hi Andreas,

this should work by default. Usually all phones with single line reject 
with "busy  here" all incoming calls if one is already in progress (even 
during call setup -ringing).

regards,
bogdan

Andreas M. wrote:

> Hi all,
> i want to introduce following in my configuration:
>
> CallerA calls CallerB -> ringing
> CallerC calls CallerB -> reject
>
> during this transaction, without that CallerB picks up the phone, 
> CallerC should not be able to call CallerB during this transaction,
>
> After this transactions, CallerC can call CallerB also.
>
> Any ideas how to check if there is an ongoing transaction ?
>
> regards,
>
> Andreas M.
>
>
>
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