Expansion Stages and System Capacity
53
Mitel SMB Controller
syd-0657/2.0 – R6.0 – 09.2018
ceivers – depends on the number of users with integrated mobile/external phones
who want to use this functionality simultaneously.
One
Mobile or External Phone Extension
licence is required for each integrated mo-
bile/external phone.
•
CAS
CAS (Channel-associated signaling) is a signalling protocol for PRI-E1 network in-
terfaces used in certain countries (e.g. Brazil). This setting provides the tone sender
and receiver for transmitting signalling information.
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.
