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VoIP Telephones
VoIP Telephones
VoIP stands for “Voice over IP” and refers to telephony where voice data is transmitted via Internet Protocol
(IP). VoIP enables companies to use existing company data lines without having to lay new telephone lines. To
be able to use this technology, however, suitable devices which support it are necessary.
The following IP system telephones are suitable, e. g. Comfort Pro P 300 IP and Comfort Pro P 500 IP. These
telephones offer the same range of functions that the Comfort Pro P 300 and Comfort Pro P 500 standard
system telephones offer and are operated in exactly the same way. The number of keys and their functions
and the displays are the same for both the standard and the IP system telephones. Key extensions can also be
connected to IP system telephones (see also the chapter Key Extensions starting on page 34).
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Note: The IP telephones Comfort Pro P 300 IP and Comfort Pro P 500 IP can only be
operated on the Comfort Pro communications system.
If your system administrator has configured an IP system telephone for you, the following information will be
of interest to you:
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During some connections you may experience short breaks or hear an echo. This depends on the
transmission quality of the line and is not due to your telephone functioning improperly.
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If your telephone is being connected to the line or the connection is interrupted (e. g. if the company
network breaks down), the required terminal software will be loaded (the telephone “reboots”). This
happens automatically and may take some minutes. The telephone is ready for operation when the
display shows the time and the internal call number. Then you may use the telephone as per usual.
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When telephoning via connected headset, it is advisable to wait a second after accepting an incoming
call before you begin to speak. This brief time interval is necessary to allow the VoIP connection to be
established between yourself and the caller.