A service feature in which a user initiates service on a previously arranged trunk or transfers, without human intervention, from an active trunk to a standby trunk.
... 18 to 24, 36.3% from 25 to 44, 25.1% from 45 to 64, and 7.0% who are 65 years of age or older. The median age is 36 years. For every 100 females there are 92.3 males. ...