-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 2012-08-25 23:48, James Knott wrote:
That number is carried over SS7 on the POTS network and a similar method exists for SIP. If a carrier does not pass on that number, they're violating the SS7 specs.
Pre 1997 the telco in Spain did not. I worked for one of the newcommer telcos, and one of the problems was that some calls did not carry the ID via SS7 signaling. I was in the department that received those problems, we found out that. Of course, in most of those occasions, it happened that the caller was on one of the few analog switches remaining (rotary?), so caller ID was impossible. Telefónica had to supply us with a list of all the phone ranges for which caller ID was impossible, so that our telemarketers did not offer service to them. - -- Cheers / Saludos, Carlos E. R. (from 12.1 x86_64 "Asparagus" at Telcontar) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.18 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAlA5cAMACgkQIvFNjefEBxocCwCdH+s6QALAIX9D28Z97w5TWSIL JcwAoNs0AoFkgazdeSwjFzTZttozwGvP =C9fc -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org