transfer - With Asterisk, how to make a call between 2 externals then hangup? -

my problem following.

i want:

• to called a
• read code (ex. 15334#)
• retrieve phone number of b database code readed a
• call b
• once in communication b, hangup after 3 seconds

for now, works, but when hangup (after 3 seconds), communication between , b closed.

a , b external numbers.

how hangup server without closing communication between & b?

thanks lot,

doing way did called "bridged call". when close bridge,it hangup. need transfer call. unfortanly require transfer support provider side. sure no 1 of providers 0 cost.

provider can organize using other asterisk(at provider side) or special hardware pbx or other hardware/softswitch solution. if provider can feature you, provider inform how do. example provider allow transfer using flash+dtmf command(on analog lines).