[Serusers] on busy

[Iqbal]

Hi

If a user is busy, or does not asnwer ser can send the call to 
voicemail, now if I have plugged in asterisk, and am using asterisk to 
route the call back out, I can either have asterisk drop the call to 
voicemail when busy using extensions, OR send a busy message back to SER 
which will then process and send to asterisk...anyone know which 
is/would be better, I am thiking the latter, since I am then pretty much 
using SER for processing messages all the time

Iqbal