Mitel 470 System Manual page 52

Expansion Stages and System Capacity
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
bile/external phone.
• FXO
The basic resources (fixed DSP functions on the call manager card) cover 16 FXO
interfaces. For system configurations with more than 16 FXO interfaces this setting
provides additional dialling tone and busy tone receivers.
Note: The values of the user-definable FXO channels corresponds to the number of
FXO interfaces, not the number of additional dialling tone and busy tone receivers.
• CAS
CAS (Channel-associated signaling) is a signalling protocol for PRI network inter-
faces used in certain countries (e.g. Brazil). Tone sender and receiver are required
to transmit signalling information. Sufficient transmitters / receivers are already
available for 1 PRI interface on the DSP of the Call Manager card (see Tab. 16). If
this is not sufficient, additional senders/receivers can be configured with this setting.
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licence is required for each integrated mo-
syd-0585/1.2 – R4.1 – 08.2016
Mitel 470 as of R4.1