[asterisk-users] Asterisk 1.8 Transfer CallerID

[Kevin P. Fleming]

On 05/08/2012 08:50 AM, Jonathan Rose wrote:
> ----- Original Message -----
>> From: "Jonas Kellens"<jonas.kellens at telenet.be>
>> To: "Asterisk Users Mailing List - Non-Commercial Discussion"<asterisk-users at lists.digium.com>
>> Sent: Tuesday, May 8, 2012 7:13:30 AM
>> Subject: [asterisk-users] Asterisk 1.8 Transfer CallerID
>>
>>
>> Hello,
>>
>> when a call comes in and is answered by colleague A, this colleague A
>> sees the CallerID of the external calling number.
>>
>> When colleague A transfers the call to colleague B, attended or
>> unattended, then colleague B sees the number of colleague A on his
>> screen while talking to the external calling number.
>>
>
> That would be because this is the expected behavior.  The call isn't
> coming from the outside caller, it's coming from the person who
> transferred it.
>
>> I expect here that colleague B would see the external calling number
>> on the screen of his IP-phone.
>>
>> How can I get this behaviour ?
>>
>>
>> Thanks.
>> Jonas.
>
> Getting this behavior shouldn't be too hard I wouldn't think. First,
> be aware that the Dial command has an option s(x) which is described:
>
> s(x): Force the outgoing callerid tag parameter to be set to the
>      string<x>.
>      Works with the f option.
>
> So if you simply transfer to a dial application with that option,
> you can force the callerid to be whatever you want it to be. You can
> also retrieve the callerid of the original caller and put it on your
> transferring peer in a variable when starting the call. I'm not
> exactly sure on the specifics of that right now, but I'm pretty sure
> it should be possible. So then when you are making the transfer to
> dial, you just use that variable as your argument to the s option.

This is overkill, although it is certainly a way to approach it.

If the OP's SIP peers for his phones are configured to send 
Remote-Party-ID or P-Asserted-Identity to those phones, then the 
behavior he's looking for should be automatic, since Asterisk 1.8.x has 
Connected Line update support. Of course, this also assumes that the 
phones in question have the ability to receive this information and 
update their displays. This can be tested by using the CONNECTEDLINE() 
dialplan function to send anything desired to a phone that is in a call 
with Asterisk.

-- 
Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
Jabber: kfleming at digium.com | SIP: kpfleming at digium.com | Skype: kpfleming
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
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