[Asterisk-Users] Definitive CallerID Format and anonymous?

[Robert Goodyear]

On Jul 8, 2005, at 12:43 AM, Jay Milk wrote:

> All,
>
> I'm currently only setting CID as a ten-digit number.  Has anyone on
> this list tested caller-id delivery with various services?  Is there
> *one* usable format (i.e. 1+10, or "+1"+10), or does it vary from
> provider to provider?
>

Jay, FWIW the US standard for CLI is ten digits. I don't know if this 
has anything to do with your root question, but I thought I'd chime in 
here. I notice that one of my providers sends 1 plus ten for US calls, 
which is nonstandard and thus breaks CNAM lookups on the recipient's 
end via their PSTN provider. When one of my providers was sending the 
plus sign and eleven digits, it would break completely when that call 
was destined for an AT&T cellphone.

Hope that helps.

-Rob.