Pub. 42004-463C
VoIP Speaker Amplifier Interface
Page 3 of 13
P:\Standard IOMs - Current Release\42004 Instr. Manuals\42004-463C.docx
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Multicast Broadcasts
The VoIP speaker amplifier interface can receive multicast broadcasts. Multicast allows a single audio
stream to be sent to multiple end points simultaneously, achieving multi-point paging or
public address
functionality over IP. Multicast requires the use of a SIP server that specifically supports multicast
functionality and each interface must be configured (enabled) to receive multicast packets.
Installation
Safety and General Information
Installation must be performed by qualified service personnel in accordance with the National
Electrical Code or applicable local codes.
Power Sources
—Operate this unit only from the type of power source indicated on the label.
Contact qualified service personnel if unsure of the type of power supply to use.
•
Refer to operating instructions for units intended to operate from battery power.
•
Use only the recommended approved power supplies with units intended to operate with external
power supplies.
•
The power source must comply with EN60950 for units intended to operate with a limited power
source. Substitutions may damage the unit or cause fire or shock.
Electromagnetic Interference/Compatibility
Electronic equipment may be susceptible to electromagnetic interference. If you experience interference,
visit the FCC website at
for possible solutions.
Safe Handling of CMOS Integrated Circuit Devices
Many of the integrated circuit devices used in communications equipment are of the Complementary
Metal Oxide Semiconductor (CMOS) type. Because of their high open circuit impedance, CMOS
integrated circuits are vulnerable to damage from static charges. Care must be taken handling, shipping,
and servicing them and the assemblies in which they are used.
Even though protection devices are provided in CMOS integrated circuit inputs, the protection is effective
only against overvoltage in the hundreds of volts range such as is encountered in an operating system. In
a system, circuit elements distribute static charges and load the CMOS circuits, decreasing the chance of
damage. However, CMOS circuits can be damaged by improper handling of the modules, even in a
system.
To avoid damage to circuits, observe the following handling, shipping, and servicing precautions:
•
Prior to and while servicing a circuit module, particularly after moving within the service area,
momentarily touch both hands to a bare metal, earth-grounded surface. This will discharge any static
charge that may have accumulated on the person doing the servicing.
N
OTE
:
Wearing a conductive wrist strap will minimize static build-up during servicing.
•
Whenever possible, avoid touching any electrically conductive parts of the circuit module with your
hands.
•
Power down the unit before installing or removing the circuit module.