From other thread:
You could script this elegantly in the dial plan and then program the extension into the speed dial. How many numbers are we talking about?
[speed-call-custom]
exten => _555,1,Playback(transfer)
exten => _555,2,Flash()
exten => _555,3,SendDTMF(4405551212)
exten => _555,4,Hangup()
This would call 4405551212 when you dial 555 from your phone.
From Addison:
I would do this! I would add as many of these as you have sales people. Create custom destinations for each one and then put them in your IVR.
Will require some modification to add the second hook flash.