Specifications

Make sure that both devices are powered and establish a normal connection to your remote control. Issue the
security codes and commands necessary to select and control channel 7. (In the case of the RFC-1/B, enter 07 to
select channel 7 and enter the control security code 66.) Issue the command to activate the On/Raise control relay
(# on the RFC-1/B). This command will activate the DAI-2 by bridging the Connect switch as described above. Both
devices are now connected to the telephone line--but the DAI-2 is not yet active.
Enter the hangup command to the remote control (99 for the RFC-1/B) so the remote control releases the line. Enter
❊❊❊❊ to activate the DAI-2. When the DAI-2 activates it will not require security code for access.
When the DAI-2 is waiting for a security code it will not recongize a telephone hang-up (if it did, it would release the
line when the remote control drops off). If the remote control hang-up is causing the DAI-2 to release the line,
increase the length of the security code timer. During a transfer, do not enter the DAI-2 activation command ❊❊❊❊
until after the remote control disconnects from the line.
4.4.2 Control via VHF or microwave RPU
A variation of the Transfer from Remote Control connection described above can be used to connect to and control
the DAI-2 using an RPU. This connection can be used instead of (or in addition to) a telephone line. Connect the
squelch relay contacts to the MAN and GND screw terminals described in the previous section. When the RPU is
keyed on, the squelch relay closure will bring the DAI-2 online. Enter ❊❊❊❊ to activate the DAI-2. When the DAI-2
activates it will not require security code for access. The squelch relay will hold the DAI-2 online as long as it is
engaged. When the squelch relay releases, the DAI-2 will disconnect.
Audio signals from the RPU must be routed to the input of the DAI-2. A sample schematic is provided in the
Installation section of this manual. The DAI-2 will ignore chatter on the squelch relay as long as contact is not lost
for more than one full second. You must have an external means of generating DTMF tones to control the DAI-2.
4.5 Command Sets
The DAI-2 stores four command sets in its non-volatile memory. A command set defines how the unit will respond
when telephone keys are pressed and when logic level inputs are activated. Three of these command sets are
permanent and cannot be changed--the forth is fully user programmable. While four commands sets are stored in
memory only one command set can be active at a time. The active command set is selected by changing the
programming in system profile at address 358--Active Command Set.
Command sets tell the DAI-2 how to respond when: a key is pressed; a logic level input is detected; or the system is
reset. Each key and logic level input can set different conditions except the key which used by the system and is
not programmable. System responses can include: opening, closing or momentarily closing relay contacts;
switching audio either into or out of the DAI-2; generating an audible slate tone for cuing; and triggering a series of
telephone calls to warn of an alarm condition.
4.5.1 Command Set 0 -- User Defined
Command set 0 is entirely user programmable. From the factory, command set 0 contains the same settings as
command set 3 for emergency broadcast operation. Instructions for reprogramming are in the next section of this
manual. The three factory programmed command sets provide good examples of the variety of uses and
programming options for the DAI-2.
DAI-2 Operation page 4. 5