6
DRD-4
DRD-4
STYLE 4 port
—This port rings with
a short-long-short ring cadence. Use
this port for any telephone device
that you wish to respond to the
the phone company.
• The DRD-4 recognizes each ring
cadence and automatically
directs each call to its intended
destination.
• The DRD-4 allows any phone
directly connected to the unit to
answer all phone calls during the
ring signal. Once you answer a
call, the DRD-4 will not allow any
of its ports to interrupt a call to
another port. This feature
ensures your privacy during
phone calls and guarantees data
integrity when you use data
equipment.
NOTE: Only the phones connected to a port
will ring when calls are directed to
that port, but you can answer those
calls from other phones.
STYLE 4
fourth phone number.
Fig. 2-6. Style 4 Port.
NOTE: The dashed lines above each port
correspond to the port’s unique ring
cadence.
2.3 Functions of the DRD-4
The DRD-4 is compatible with any
type of telephone device that
responds to a standard phone-
company ring signal. It functions as
follows:
• The DRD-4 monitors the
telephone line for the four
distinctive ring cadences from
