[Asterisk-biz] Caller ID name propagation

[Kevin P. Fleming]

alex at pilosoft.com wrote:

> It should take 0. CLECs are not supposed to cache results of CNAM lookups.  
> (according terms of service of people who run CNAM databases). However,
> most CLECs do anyway, since CNAM lookup costs money.

I have a strong suspicion that some CLECs are _not_ using the same SS7 
database as they are supposed to be. Before I moved away from Phoenix, I 
had telephone service provided by the cable company (Cox). Not only were 
there CNAMs frequently wrong due to looking up the wrong number, when 
they did look up the right number they often provided an 'old' name for 
that number.

They would never admit this, of course, but I believe they are using an 
'alternative' CNAM database which costs less to query, and also is crap 
:-) In fact, another CLEC that I buy PRIs from has told me that when I 
send them CNAM updates it can take quite some time for all other LECs to 
start showing the new name.