OBi Phone Service $39.99/year
SteveInWA:
Quote from: giqcass on January 06, 2014, 01:19:10 am
I am of the understanding the information SteveInWA wrote above is correct for the US and most other locations.
I didn't think I needed your approval on my posts, but thanks, anyway. ::)
Quote from: giqcass on January 06, 2014, 01:19:10 am
I also believe based on reading that CNAM is usually tossed out even when it is transmitted with CID. If you want your CNAM information to show up you can submit the info to some of the databases.
CNAM isn't transmitted from the calling party's PSTN, period. It is always a database look-up by the called party's telco. I tried the "listyourself" website once in the past. It's useless/broken/doesn't work for consumers; it's mainly a company selling database services.
Quote from: giqcass on January 06, 2014, 01:19:10 am
Minor Rant:
Honestly the whole CNAM/CID system could use an update. There is no way to be sure you are talking to the person you think you are talking to when you receive a call. The data is too easy to fake. My policy is to never discuss private information with someone that calls me. If they need that kind of information I call them back. The SMS system in the US is far more secure when it comes to identity.
Caller ID was useful as a authentication system only under the original monopoly, closed Bell System. After the deregulation, that level of vertically-integrated database management went away, and it became merely informational. With the later advent of VoIP, and caller ID spoofing via PBX and SIP server software, its trust level declined substantially, but it's still useful as one piece of information, in context. If I get a call with caller ID = Wells Fargo, I don't trust it at all. If I get a caller ID with my best friend's name, it's highly likely to be him. While you could argue that SMS sender ID is more secure, it isn't "far" more secure, as it's also easy to spoof. Unfortunately, millions of people, often elderly and of low income, are scammed by both phone and text, using combinations of false or misleading identification or social engineering. The best defense is education, not technology.
giqcass:
Quote from: SteveInWA on January 06, 2014, 02:01:26 am
CNAM isn't transmitted from the calling party's PSTN, period. It is always a database look-up by the called party's telco. I tried the "listyourself" website once in the past. It's useless/broken/doesn't work for consumers; it's mainly a company selling database services.
Although I can not personally verify it my reading suggests otherwise. Telephone systems differ from one country to the next. You really must consider the US and Canada as legacy telephone carriers. Do you have any Idea how far our telecommunication systems are behind other countries?
I am of course not referring to third world countries.
SteveInWA:
Quote from: giqcass on January 06, 2014, 06:07:18 am
Quote from: SteveInWA on January 06, 2014, 02:01:26 am
CNAM isn't transmitted from the calling party's PSTN, period. It is always a database look-up by the called party's telco. I tried the "listyourself" website once in the past. It's useless/broken/doesn't work for consumers; it's mainly a company selling database services.
Although I can not personally verify it my reading suggests otherwise. Telephone systems differ from one country to the next. You really must consider the US and Canada as legacy telephone carriers. Do you have any Idea how far our telecommunication systems are behind other countries?
I am of course not referring to third world countries.
My original answer was accurate, relevant to the discussion, and was simply expanding on the also-correct answer that sdb posted.
Given that the majority of OBi users are making US-based telephone calls, and there was no mention of international telcos in this thread, I was describing the PSTN Caller ID system as developed and implemented by the Bell System in the United States of America. That system is still used by USA-based carriers, for calls terminated on USA PSTN DIDs. Of course it doesn't apply to many other countries' phone systems, which have many other characteristics that differ from the US system. The service isn't even known as "Caller ID" in most other countries. I didn't think I needed a disclaimer to avoid a pedantic argument from you, but here you go:
My posts refer solely to the PSTN and VoIP technology deployed by US-based LECs and ITSPs. They do not apply to non-US countries, nor to military communications, ham radio, smoke signals, ship-to-shore communications, secret agent gizmos, tin cans and string, or yodeling. If you have an erection lasting more than four hours, seek medical help immediately. Warning, objects in mirror are closer than they appear, this bag is not a toy, and the beverage you are about to enjoy is very hot.
gderf:
@SteveInWA
ROFL
Ostracus:
The bad thing about Caller-ID is how much of the Obi's functionality goes away/impaired if it's broken, or missing. IMHO I personally like the Canadian way of doing it.
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