my understanding of it has always been that it means you are sending the name out, but if the carrier isn't passing it along for you it does no good. i could be wrong. below is from the screen reference guide, which you can get here:
Send Name
Specifies whether the calling/connected/called/busy party’s administered name, or the name on
a redirected call, is sent to the network on outgoing/incoming calls. Valid entries are y, n, or r
(restricted). The value r indicates that the calling/connected name will be sent by
Communication Manager, but will be marked “presentation restricted.” This value is valid only if
the Supplementary Service Protocol field is a (national supplementary service), b (for called/
busy only) or d for the QSIG Global Networking Supplementary Service Protocol. When the
Supplementary Service Protocol field is e (DCS with Rerouting), only values of y and n are
permitted. For redirected calls, the value y indicates that the name is displayed, while for n and
r, the redirected caller name is not displayed.
When the Send Name field in n, an incoming name is not tandemed out again if the
Supplementary Service Protocol field is any value other than b (QSIG). Similarly, when Send
Name is r (restricted), an incoming name is marked restricted when it is tandemed out again.
However, if the Supplementary Service Protocol field is b (QSIG), then an incoming name is
passed on unchanged and the Send Name field is ignored.
Note:
Note: If name information is not administered for the calling station or the connected/
called/busy station, the system sends the extension number in place of the name.