AT&T ISDN 7507, ISDN 7505, ISDN 7506 manual Priority Calling

Priority Calling

To place a priority call	1	Press ì Priority ü
(3-burst ring)	2	or Dial Priority Calling Code	[dial tone]
		Dial extension
	3	Wait for called party to answer

To change a regular call into a priority call (3-burst) when you hear a call waiting ringback tone

1Press ì Priority ü

●Called party receives a priority call waiting tone (3-burst)

2Wait for called party to answer

Note: If you still receive a call waiting ringback tone, wait a few minutes and try again.