AT&T Door Phone Controller Installation And Operation Manual page 84

Reset Option
Selections to Factory
Defaults
Phone Number
Storage Memory 1
Phone Number
Storage Memory 2
Delay Before Door
Ajar Call Back
B-2 Option Selection Mode Definitions
This option is useful when current option selections are
unknown. Note that this function will reset the Door Unlock
Code to the default value, but it will not reset "Phone Number
Storage Memory 1" or "Phone Number Storage Memory 2"
(see below). Defaults to dialing phone number #1.
This option is used in what is called "Ringdown Mode" to
auto-dial a particular extension or outside-line phone number.
The AT&T Door Phone Controller has two memory locations for
holding user stored telephone numbers. Phone numbers can
be for telephones within the same building or off-premises.
These memory locations are used exclusively in Ringdown
Mode. Only one memory location is active at a time. To select
the active location for the phone number, a telephone
connection to the AT&T Door Phone Controller must be made
(by calling the extension number of the Door Phone). Once
connected dial in "##1", this selects Memory Location 1; if you
were to dial in "##2", you
See above explanation.
This option determines the length of time allowed for the door
to shut after it has been opened by the strike plate release. If
the door is still ajar at the end of this period, the controller will
call back and an alarm tone will be heard in the receiver when
the phone is answered.
would select Memory Location 2.