Call Forward with Caller ID

Answered Question
Jan 14th, 2008

Hi

We have been asked by a customer if it is possible to forward a call using call forward all, and still display the original caller id.

Basically the system forwards all calls after hours to a mobile. But the customer wants the caller's number to display on the mobile. Is this possible?

They are using a new Cisco UC500 series.

Many Thanks

I have this problem too.
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Correct Answer by Paolo Bevilacqua about 8 years 11 months ago

Hi,

No, generally it's not possible, because telco doesn't accept arbitrary numbers as calling.

Otherwise, it would be possible for anybody, to originate calls pretending to be someone else, for prank or malice, obviously this is not safe.

I said generally because some telcos in the US, for PRI customers, don't care about which calling number is used, and send it unchanged.

Hope this helps, please rate post if i does!

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Correct Answer
Paolo Bevilacqua Mon, 01/14/2008 - 12:26

Hi,

No, generally it's not possible, because telco doesn't accept arbitrary numbers as calling.

Otherwise, it would be possible for anybody, to originate calls pretending to be someone else, for prank or malice, obviously this is not safe.

I said generally because some telcos in the US, for PRI customers, don't care about which calling number is used, and send it unchanged.

Hope this helps, please rate post if i does!

Brett Gustafson Fri, 06/01/2012 - 08:17

I don't know if this is possible on a UC500, but in my experience, it is usually able to specify any valid caller ID on a PRI.  At least as far as I've seen, on a PRI they are not concerned with your spoofing Caller ID.

Paolo Bevilacqua Fri, 06/01/2012 - 09:00

Brett Gustafson wrote:

I don't know if this is possible on a UC500, but in my experience, it is usually able to specify any valid caller ID on a PRI.  At least as far as I've seen, on a PRI they are not concerned with your spoofing Caller ID.

That is true in the US, but not in other countries. And even in the US, is not allowed anymore on most SIP trunks.

Gustavo Moreschi Mon, 02/29/2016 - 08:35

Paolo, is this statement still valid?

My provider allows me to send whatever callerID I want to PSTN.

However, even though I'm not able to send the originator callerID back to PSTN via CFW in H323 GW.

Let me know if you can point me out to the right direction.

Thanks!

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