[Asterisk-Users] transfer pstn call to voip line, thus freeing up pstn line

[Eric Wieling aka ManxPower]

Joseph wrote:

> On Sat, 2005-04-30 at 13:23 -0400, Time Bandit wrote:
> 
>>>I was wondering if there was a way to have incoming
>>>calls to my PSTN line be "transferred" to a voip line?
>>>
>>>I would like to make it so that as soon as the pstn
>>>call is recieved it will switch the call to the voip
>>>line, thus freeing up the pstn line to get more calls.
>>>Kind of like roaming.
>>
>>If you have call transfer on your line, you can do it with somethin like this
>>(from the top of my head)
>>exten => s,1,Answer()
>>exten => s,2,Flash()
>>exten => s,3,SendDTMF(${MYVOIPNUM})
>>exten => s,4,Hangup()
>>
>>Basically, you hook-flash the line (giving you a dialtone), compose
>>the number where you want the calls to be forwarded, then hangup the
>>line. The calling party will be connected to the destination and your
>>line will be free
> 
> 
> Correct me anybody if I'm wrong; but I think this way he will only free
> his internal extension not the PSTN line.
> I think the only way of doing this is to order call forward feature form
> his PSTN service provider, so when the call comes and his number is busy
> it will automatically redirect it to let say DID number over IP (or any
> other number). 
> 

The better way would be to order Call Forward Busy Line from their 
telco.  In the example above when the hangup() happens both legs of 
the call will be disconneced.  The person should order 
Conference/Drop/Transfer service from his/her telco, rather than the 
traditional Three-Way Calling service if they really want to transfer 
the call.

-- 
Always do right. This will gratify some people and astonish the rest.
Mark Twain