VoIP Telephones89VoIP TelephonesVoIP stands for “Voice over IP” and refers to telephony where voice data is transmittedvia Internet Protocol (IP). VoIP enables companies to use existing company data lineswithout 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. Aastra 6773ip(OpenPhone 73 IP) and Aastra 6775ip (OpenPhone 75 IP). These telephones offer thesame range of functions that the Aastra 6773 (OpenPhone 73) and Aastra 6775(OpenPhone 75) standard system telephones offer and are operated in exactly thesame way. The number of keys and their functions and the displays are the same forboth the standard and the IP system telephones. Key extensions can also be con-nected to IP system telephones (see also the chapter Key Extensions starting onpage 30).If your system administrator has configured an IP system telephone for you, the fol-lowing information will be of interest to you:• During some connections you may experience short breaks or hear an echo. Thisdepends on the transmission quality of the line and is not due to your telephonefunctioning improperly.• 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 beloaded (the telephone “reboots”). This happens automatically and may take someminutes. The telephone is ready for operation when the display shows the timeand the internal call number. Then you may use the telephone as per usual.• When telephoning via connected headset, it is advisable to wait a second afteraccepting an incoming call before you begin to speak. This brief time interval isnecessary to allow the VoIP connection to be established between yourself andthe caller.
