VoIP System Telephones
Voice over IP (VoIP)
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VoIP System Telephones
The following telephones and software packages are available for VoIP
system telephony:
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Forum IPhone 525: This is a VoIP-enabled edition of the Forum Phone 525
system telephone. This system telephone can be extended with up to three
key extensions (Forum 500 Keypad Paper FP 525/535).
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Forum IPhone 535: This is a VoIP-enabled edition of the
Forum IPhone 535 system telephone. This system telephone can be
extended with up to three key extensions (Forum 500 Keypad Paper
FP 525/535 or Forum 500 Keypad Display FP 535).
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Forum IPhone PC: This VoIP software offers the functionality of an system
telephone using Windows executable software (see
starting on page 194). This software also provides local answering
machine functionality and can be integrated into CTI applications.
Device Properties
The VoIP-enabled versions of the system telephones Forum IPhone 525 and
Forum IPhone 535 offer the same features as the corresponding system
telephones. Using VoIP system telephones is therefore not much different
from using standard system telephones. The following differences exist:
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Two RJ45 connector ports are available for ethernet connection. The ports
are connected to one another via the telephone’s internal switch. The
switch supports 10 Mbit/s or 100 Mbit/s full-duplex with priority given to
VoIP data transmission.
LAN Port
: Allows the telephone to connected to the LAN. Use a non cross-
over RJ45 patch cable to connect to a Hub or Switch.
PC Port
: Allows the telephone to be connected to a workstation computer.
Use a non cross-over RJ45 patch cable to connect to the PC’s network
port.
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The VoIP system telephone’s power supply is provided by an extra plug-in
power supply. It is also possible to provide a power feed via PoE (“Power
over Ethernet”). PoE requires special devices for power feeds, as well as a
completely wired RJ45 connection line.
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You can also connect a standard headset via RJ45 sockets (DHSG
standard) to VoIP system telephones.