you have 2 options here. you can use the definity vector commands to calculate the EWT and tell the caller how long it will take to answer the call (announcements) or I recon you could use the definity EWT command in a vector to calculate the time and send it to a vdn that is monitored by the asai (eg. there is a vdn for 1 min, vdn for 2 min, vdn for 3 min etc)
goto step x if ewt is x and step x is a vdn that is monitored via the third party. after the vdn the call is passed to a vector that passes the call to the third party.
easier to do it the first way though, and cheaper.
cheers jay