Aastra 400 Series System Manual page 443

If B is making an exchange all,
abled for exchange calls, throughout the system.
Notes:
– In connection with the Silent intrusion feature, relevant national data
protection regulations must be observed.
– One Silent Intrusion licence is required to be able to use the Silent intru-
sion feature.
– Silent intrusion is not possible in all cases and in certain cases may
cause a crackling sound (see
– Analogue terminals cannot switch directly from the Silent intrusion
state to Intrusion. The microphone is always active with these termi-
nals.
Connections overview
Silent intrusion is not possible in all cases and not absolutely silent. For IP-IP, IP-SIP
and SIP-SIP connections, the media is switched directly and not via the system. In
these cases the connection must first be fetched into the system for the intrusion,
causing a faint crackling. Prerequisites for this procedure are sufficient VoIP licenses
and DSP resources.
Tab. 234 Silent intrusion: Connections
Existing connection combination
External (ISDN, FXS) — internal (any)
External SIP — internal (DSI, DECT, ISDN, FXS)
External SIP — internal (IP, SIP)
Internal (IP, SIP) — internal (IP, SIP)
Internal (DSI, DECT, ISDN, FXS) — internal (DSI, ISDN, FXS, IP,
SIP)
Internal (DECT) — internal (DECT)
External (any) — external (any)
System functions and features as of R3.0
syd-0367/1.3 – R3.0 – 03.2013
Silent intrusion will only work if this feature is also en-
Tab. 234).
DSI, DECT, IP, FXS
Audible crackling
Audible crackling
Intruding terminal
Silent Not possible
Silent Not possible
Not possible
Not possible
Silent Not possible
Not possible Not possible
Not possible Not possible
Features
ISDN, SIP
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