Expansion Stages and System Capacity
VoIP mode Explanation Licences
Secure G.711/G.729 Same as G.711/G.729 but with a
more secure data transmission
using the SRTP protocol.
The Secure VoIP licence, valid
right across the system is
required.
Reserving audio channels
The allocation of audio channels between voice mail, auto attendant, call recording and announcements is
set in the general voice mail settings.
An audio channel is always used for Auto attendant when an incoming call triggers greetings from
mailboxes which are assigned an Auto Attendant profile. Audio channels of auto attendant are also used
for queues with announcement. 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.
Audio channels for announcements are used if the announcements have audio files. No audio channels
are required for normal announcements by phone.
If no audio channel is reserved for any of the functions described above, or if all reserved audio channels
are already used, audio channels from the Non-reserved/shared pool are used.
No audio channels can be reserved for conference bridges. Audio channels from the Non-reserved/shared
pool are always used for the conference bridge.
Announcement service and music on hold use their own resources.
Table 18: Reserving audio channels
Parameter Explanation
Available audio channels Maximum available audio channels on this node.
This value depends on the configuration of the
media sources.
Reserved for Auto-Attendant Number of audio channels on this node used for
auto attendant and queue with announcement
only.
Reserved for voice mail Number of audio channels on this node that can
be used exclusively for voice mail.
Release 7.1
System Manual for Mitel SMB Controller 50
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