Don't think so. The sequence with the hookflash and a single line phone is used for a transfer or conference call, but not to select inside or outside dial tone. The usual scenario, as you know, is like you are used to setting up, pickup system dial tone, then the dial out code for an outside call. You can use auto line select to go off-hook with outside dial tone, but I know of no way to then select inside dial tone. TipHelp@charter.net