I have a question regarding the flags for hiding caller ID presentation:
My customer has a requirement that they are able to specify if outbound calls (on a T100P) will have the caller ID displayed or not. This could be easily solved, of course, by not setting a caller ID when creating the outbound call. However, the PRI to which this T100P is connected _must_ see a valid caller ID, and the caller ID is used for billing purposes.
I know that there is the ability to hide caller ID within the Zaptel libraries, using the presentation flags. If set correctly, the expected behavior would be that the ANI would be sent to the switch, but with a flag that would tell the remote switch to suppress the caller ID from being transmitted to the end user.
How does one activate that presentation switch from within a dialplan?
Searching the archives gives me some hints, but no answers. Searching the code, I see in channels/chan_zap.c around line 1399 that the PRES_ALLOWED_USER_NUMBER_PASSED_SCREEN and PRES_NUMBER_NOT_AVAILABLE are referenced, but I'm not clear on where "l" is set, or even if that is a trigger. Can someone give me a hand on syntax on this?
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