Expansion Stages and System Capacity
46
Aastra 415/430 as of R3.2
syd-0344/1.6 – R3.2 – 09.2014
Use of VoIP channels
VoIP channels are always required between IP and non-IP endpoints. They are
freely available, i.e. they are always used wherever they happen to be needed. The
figure below gives an overview of the cases where VoIP channels are needed and
how many of them
Tab. 18 Required VoIP channels between two possible endpoints
Non-IP endpoints:
• Analogue terminal (FXS)
• Digital system terminal (DSI)
• DECT cordless phone (DSI)
• ISDN phone (BRI-S)
• External via analogue exchange (FXO)
• External via ISDN exchange (BRI-T/PRI)
• Internal voice mail system
•Auto attendant
• Internal announcement service
•Music on hold
• Conversation recording
• Queue with announcement
IP endpoints
• IP system phone
• Aastra SIP terminal
• Standard SIP terminal
• DECT cordless phone via SIP-DECT
• WiFi cordless phone via SIP-DECT
• WiFi cordless phone via SIP access point
• WiFi mobile phone via AMC controller
• External via SIP provider
IP endpoints on satellites:
In normal operation all IP endpoints are registered with
the master, even if they are located on the satellite.
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