Expansion Stages and System Capacity
47
Aastra 415/430 as of R3.2
syd-0344/1.6 – R3.2 – 09.2014
Standard Media Switch modes of operation
The operation mode of the integrated standard media switch is defined with the
VoIP mode
parameter in the DSP configuration (
=ym
). The configured mode is al-
ways valid for the entire node.
Tab. 19
Integrated Standard Media Switch modes of operation
Reserving audio channels
The allocation of audio channels between voice mail, auto attendant and call re-
cording is set in the general voice mail settings (
=u1
). An audio channel for auto
attendant is always used in cases where an incoming call results in greetings being
played back from mailboxes which have been assigned an auto attendant profile.
In all other cases one audio channel is used for voice mail in connection with the
voice mail system. Audio channels for call recording are used exclusively for the
manual or automatic recording of phone calls.
Tab. 20
Reserving audio channels
VoIP mode
Explanation
Licences
No VoIP
No VoIP channels can be configured.
G.711
Although more voice channels are availa-
ble per DSP in mode
G.711
than in hybrid
mode, the volume of voice data is greater
and requires a greater bandwidth.
Two VoIP channels per system can be
used without a licence. One
VoIP Channels
for Standard Media Switch
licence is
required for each additional VoIP channel.
G.711/G.729
The VoIP hybrid mode
G.711/G.729
han-
dles both G.711 and G.729 for coding
voice data.
One
VoIP Channels for Standard Media
Switch
licence is required for each VoIP
channel.
Secure G.711
Same as
G.711
but with a more secure
data transmission using the SRTP proto-
col.
One
VoIP Channels for Standard Media
Switch
licence is required for each VoIP
channel. The
Secure VoIP
licence, valid
right across the system, is also required.
Secure G.711/G.729
Same as
G.711/G.729
but with a more
secure data transmission using the SRTP
protocol.
One
VoIP Channels for Standard Media
Switch
licence is required for each VoIP
channel. The
Secure VoIP
licence, valid
right across the system, is also required.
Parameter
Explanation
Available audio channels
Maximum available audio channels on this node. This
value depends on the DSP configuration.
Reserved for voice mail
Number of audio channels on this node that can be used
exclusively for voice mail.
