Fundamentals - Aastra OpenCom 100 Mounting And Commissioning User Manual

Voice over IP (VoIP)
A configuration dialogue of SIP telephony software
7. You can only conduct a certain number of telephone calls simultaneously with
internal SIP telephones. The number licenced can be viewed on the System:
Licences page. The number of SIP telephones currently licenced can be deter-
mined on the System Info: Telephony: SIP phones page. If you click on Reset
licences, the available licences will be reassigned with the next incoming or
outgoing calls.
9.2

Fundamentals

VoIP makes the transmission of voice and telephony signalling via IP ("Internet
Protocol") possible. After a connection is established, the terminal collects voice
data (PCM data), which is then sent to the receiver using an IP packet. PCM data
can also be compressed to save bandwidth.
Fundamentals
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