Voip Telephones - Aastra 6771 User Manual

VoIP Telephones

3. VoIP Telephones
VoIP stands for "Voice over IP" and refers to telephony where voice data is trans-
mitted 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 tech-
nology, however, suitable devices which support it are necessary.
The following IP system telephones are suitable, e. g. Aastra 6773ip
(OpenPhone 73 IP) and Aastra 6775ip (OpenPhone 75 IP). These telephones offer
the same range of functions that the Aastra 6773 (OpenPhone 73) and Aastra 6775
(OpenPhone 75) 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 31).
If your system administrator has configured an IP system telephone for you, the
following information will be of interest to you:
■
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 tele-
phone functioning improperly.
■
If your telephone is being connected to the line or the connection is inter-
rupted (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 tel-
ephone as per usual.
■
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.
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