Instruction manual

2-4. DV-MUX3 CONFIGURATION INFORMATION
General The DV-MUX3 contains several printed circuit boards, identified in figure 2-1:
•
Main board. This board contains most of the DV-MUX3 circuits.
•
Voice channels module. In accordance with your order, this module can in-
clude one or two voice channels.
•
Voice channel interface modules. Three types of voice channel interface
boards are available:
°
DV-MUX3-FXO for FXO interface.
°
DV-MUX3-FXS for FXS interface.
°
DV-MUX3-E&M for E&M interface.
Figure 2-1 shows two interface modules installed on the voice channels mod-
ule. One interface module is required for each voice channel. The appropriate
module is factory-installed in accordance with your order.
Prior to DV-MUX3 installation, the internal jumpers and switches located on these
boards must be set in accordance with your requirements, as explained below.
This paragraph provides information on the functions of the internal jumpers and
switches located on each board, and provides step-by-step instructions for making
the internal settings.
WARNING
ELECTRICAL
SHOCK
HAZARD
Access to the inside of the equipment is only permitted to
qualified and authorized service personnel.
Disconnect the unit from all the cables and from the power
line before removing the power cord.
Line voltage is present inside the DV-MUX3 when it is con-
nected to power. Moreover, external fault conditions may
cause dangerous high voltages to appear on the voice chan-
nel cables connected to the DV-MUX3. Observe all the appli-
cable safety precautions, and in particular always disconnect
all the cables connected to it, and then disconnect the input
power from the DV-MUX3 before disconnecting the DV-
MUX3 power cord from the enclosure.
Any adjustment, maintenance, and repair of the opened in-
strument under voltage should be avoided as much as possi-
ble and, when inevitable, should be carried out only by a
skilled person who is aware of the hazard involved. Capaci-
tors inside the instrument may still be charged even after the
instrument has been disconnected from its source of supply.
CAUTION
The DV-MUX3 contains components sensitive to electrostatic
discharge (ESD). To prevent ESD damage, avoid touching the
internal components, and before moving jumpers, touch the
DV-MUX3 frame.
DV-MUX3 CONFIGURATION INFORMATION
DV-MUX3 Installation and Operation Manual 2-3