[asterisk-users] CallerID presentation - presentation prohibited but still passing number

phreak at phreaknet.org phreak at phreaknet.org
Thu Mar 11 14:33:00 CST 2021

I've been able to pass presentation status between tandems without 
needing to do anything explicitly. This seems to be part of the Caller 
ID that is transmitted without explicit intervention. Have you tested 
without using the u option? I've never used the u option and not had 
issues with presentation transmitting as supposed to. This is with 
manual Set(CALLERID(pres)=something) and then seeing if it gets honored 
on the other end. The remote Asterisk gets the full number, of course, 
but the called telephone does not display it. Perhaps the u option is 
intended for lines, not trunks, and so the number never gets sent?

The only time I've found I (may) need to explicitly account for 
presentation is if I am regenerating the call, and then this needs to be 
accounted for in the call file (ignore that if that makes no sense).

The only inconsistency I've encountered has to do with presentation 
mismatches between the name and the number. If, for instance, I want the 
number to display but not the same, setting the presentations as the 
documentation would suggest does not work. The behavior is inconsistent 
between different SIP clients and it didn't work for me in any logical 
way. I didn't bother to a file a bug report about it, as I worked around 
this by simply doing Set(CALLERID(name)=) to empty the name and write 
the original name back into the variable after the call. Your mileage 
may vary.


On 3/11/2021 2:22 PM, Mike wrote:
> Hi,
> Using Asterisk 13.36.0
> I have a bit of a technical issue with hidden caller IDs.  My setup, 
> at the moment, is composed of two Asterisk boxes. In some instance, 
> calls arrive on Asterisk A, and are then sent to Asterisk B for 
> further processing. The link between them is SIP (both on the same 
> switch/LAN). Asterisk A has a Digium PRI card (recent one) and a PRI link.
> When I receive a hidden number (i.e. “presentation prohibited”) call 
> on Asterisk A through PRI, I get the following Caller ID information 
> (using 444-555-6666 as example):
> “ <4445556666>”
> And
> CallerID presence is received as “prohibited_not_screened”.
> Which is fine – I know the incoming number BUT I am told not to show 
> it to the end user. All good.
> The problem is when calls are not processed on Asterisk A, but sent to 
> Asterisk B for further processing. The dial command I used on Asterisk 
> A to send calls to AsterisB is the following:
> exten => s,n,Dial(SIP/AsteriskB/123,,f("" 
> <4445556666>)u(prohib_not_screened))
> Again, so far so good. But, on Asterisk B in the appropriate context, 
> on extension 123, my first command is a Verbose to show Callerid(all) 
> and the received called id is shown as “Anonymous <anonymous>” with 
> CALLERID presence still “prohib_not_screened”. I would like Asterisk B 
> to receive the actual callerid (“ <4445556666>”) along with the 
> appropriate CallerID presence value (which is correct already).
> Basically I want to “pass forward” both CALLERID and CALLERIDPRES 
> exactly as received on AteriskA to AsteriskB so that AsteriskB gets 
> the exact same info AsteriskA had in the first place.
> How do I accomplish this?
> Michael

More information about the asterisk-users mailing list