When a call is delivered to the recipient's telephone carrier, the calling number is delivered via the SS7 network. The recipient's carrier [i:cefe88c06a]may[/i:cefe88c06a] supply a name for display with the number, but to do so, the terminating carrier must perform a database lookup to translate the calling number to a name. Different terminating carriers look this information up in different databases. When I call a Cablevision (Optimum voice) subscriber from my Vonage line, the recipient gets my name. When I call a Verizon subscriber from the same Vonage line, the recipient gets my number in both the number and name fields. Before my line was ported from Verizon to Vonage, Verizon subscribers got my name mis-spelled, while Cablevision subscribers got it correctly. I'm not sure where Vonage performs this lookup on inbound calls, or how/when they update the name databases used by other carriers who terminate calls from Vonage. But I believe these are the variables that cause the effects reported in this thread. ...
Anytime
