9
Configuration & Controls - DHY-04, DHY-04S, DHY-04T 2
Ring Detector (Auto Answer) Enable - SW4 {ON}
This switch enables the integrated ring detector, which automatically
answers incoming calls after the number of rings set using the webserver
(see page 24, Configuration - Telephone). The default is 2 rings.
Note
double cadence ring tones count both rings in the cadence pattern.
Force Static IP Address – SW6 (ON)
When SW6 is enabled (ON) during the unit power-up routines, the Network
settings are overridden to force the unit to use a static IP address of
192.168.0.100 with a subnet mask of 255.255.255.0
Network Cancellation Enable – SW7 {ON}
When switch SW7 is enabled (ON) the DHY-04 performs the echo
cancellation routine on the incoming signal from the telephone line. This
would be the normal operational setting, but it may be disabled for special
circumstances.
Country Set on Power Up – SW8 {OFF}
SW8 is only read on power-up and needs to be ON to set the specific
country code to be used for the unit (set ON the remaining switches to
define the country code - see Table 2-1 on page 10). After power up,
the switches should be returned to their normal position, otherwise the
unit may fail to work correctly. The country code can also be changed via
the Ethernet port webserver, but in either case when the country setting
is altered, any calibration parameters are discarded as they will most likely
now be incorrect. These parameters include tuned hybrid impedance
settings & coefficients and default cancellation calculation coefficients.
Country Code Selection
The correct country code selection is essential for proper operation of the
DHY-04 unit. It ensures that all telephone approval parameters are met
for operation of this unit in various parts of the world. The table following
is likely to change with additional countries or PABXs and possible detail
changes for existing countries. However the actual country codes are fixed
and will not alter. For the latest table please refer to our website www.
sonifex.co.uk/dhy04
The country codes are selected on power up, by setting DIPSwitch 8 of the
SETTINGS on the rear panel to the “ON” position and setting DIPSwitches
1-7 as per the following table or from the Webpage. Once the system has
initialised – indicated by the chase pattern of LEDs on the lower bargraph,
then all switches should be returned to their previous position for the
correct operation of the unit. ETSI, the European Telecommunications
Standards Institute (http://www.etsi.org/) govern the telcoms standards
used and in the majority of cases, it has been provisionally assumed that
the disconnect tones are at the ETSI standard - Code 1 in the following
table.