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Expansion Stages and System Capacity
45
Aastra 470 as of R1.2
syd-0337/1.2 – R1.2 – 11.2011
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 provides an overview of the cases where VoIP channels are needed
and how many.
Fig. 13
Overview of the use of VoIP channels
Master
AIN
Satellit
1 V
oIP
channel
1 V
oIP
channel
No V
oIP
channel
No V
oIP
channel
IP system phone
Aastra SIP terminal
Standard SIP terminal
DECT cordless phone via
SIP DECT radio unit
WiFi cordless phone via
SIP DECT radio unit
WiFi cordless phone via
SIP Access Point
WiFi mobile phone via
AMC-Controller
External via SIP provider
1 VoIP channel
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
Internal announcement service
Music on hold
No V
oIP
channel
No V
oIP
channel
IP system phone
Aastra SIP terminal
Standard SIP terminal
DECT cordless phone via
SIP DECT radio unit
WiFi cordless phone via
SIP DECT radio unit
WiFi cordless phone via
SIP Access Point
WiFi mobile phone via
AMC-Controller
External via SIP provider
No VoIP channel
2 VoIP channels
1 VoIP channel
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
Internal announcement service
Music on hold