2 Configuration & Controls - DHY-04, DHY-04S, DHY-04T
8
Pin 3: RxD
Pin 8:
RTS
Pin 4: N/C
Pin 9:
N/C
Pin 5: Ground
Ethernet Port
This is an RJ45 port which should be connected via CAT5 cable to an
Ethernet device or switch. The port will automatically set the pins to suit
(Auto-MDX) and select the maximum available speed (10Mbps, 100Mbps or
1Gbps) depending on the connected infrastructure (Auto-Negotiation).
Mains Input
The power supply is connected via a filtered IEC Plug and is continuously
rated 85-264V AC @ 47-63Hz.
Protective Earth Terminal
This earth bond screw terminal is a screen terminal that must be connected
to an earth point.
Configuration Settings DIPSwitches
The SETTINGS switches are used to configure the DHY-04 in the modes
that you want it to operate. A label on the top panel of the unit shows the
orientation of the switches:
The following paragraphs describe the function of each switch; the default
or normal position is shown in curly brackets.
Noise Gate Select - SW1 {ON}
An output noise gate operates when the telephone signal is below the noise
gate threshold control. This noise gate reduces the output gain by 34dB
during low level signal conditions. This eliminates the effects of telephone
line cross talk. The noise gate can be switched off if you don’t wish to use it
by switching SW1 to the OFF position.
Ducking Enable - SW2 {ON}
This switch allows the received signal to be automatically attenuated by
18db when both received and sent audio are present in the hybrid. This
allows an operator in the studio to talk over the caller at all times.
Auto Disconnect Enable - SW3 {ON}
When SW3 is enabled (ON) the DHY-04 automatically disconnects from the
telephone line by detecting the appropriate disconnect regime selected for
the specific country according to the selected country code (see Table 2-2).
Line reversal
and
K-break
work by changing the voltage on the line and
have parameters settings which indicate a duration range for which this
voltage change must be present.
Tone detection
has a more complicated
and extensive parameter set. A variety of single or dual tones with level
control are available together with the ability to handle cadence patterns,
where known countries disconnect requirements are preset, but if not the
ETSI default of 400Hz tone is used. These parameters can be defined to use
standard tones or the ‘User’ sets which are set via the webserver. You may
need this capability if your telephone system provides non-standard call
progress tones.
Coun
try Set on
P
o
w
e
r Up
Noise Ga
te
Select
Fo
rc
e
S
tat
ic
IP Addr
ess
1 2 3 4 5 6 7 8
ON
OFF
Netw
ork
Cancella
tion Enable
Aut
o
Ans
w
er Enable
Aut
o
Disc
onnect Enable
Ducking Enable
Unused
Figure 2-4: Configuration Settings Switches.
