[VoiceOps] SIP - Preserving original source number in redirected call

Dovid Bender dovid at telecurve.com
Fri Apr 12 13:40:24 EDT 2019

If it's for your own internal purposes why not use a custom header?

On Fri, Apr 12, 2019 at 1:38 PM Calvin E. <calvine at gmail.com> wrote:

> I'm faced with a Lawful Intercept scenario for SIP call forwarding which
> requires the forwarded call to contain the original source and destination
> numbers. The source number may or may not be changed on the forwarded leg.
> I see how the original called number can be preserved in Diversion
> or History-Info, but how do I preserve the original source number? Is there
> an RFC for this that I missed, or misunderstood?
> Is it as simple as using PAI for the forwarded A-number and From for the
> original? I'm concerned the wrong number might appear to the called party.
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