Expansion Stages and System Capacity
49
Aastra 470 as of R3.2
syd-0337/1.6 – R3.2 – 09.2014
•
GSM
Enhanced functionality is achieved for integrated mobile phones by providing
special DTMF receivers during the call connection. Suffix dialling functions (such
as enquiry calls or setting up a conference with function codes ) can be carried
out as a result. The number of GSM channels – and therefore the number of
DTMF receivers – is based on the number of users with integrated mobile
phones capable of using this functionality simultaneously.
One
Mobile Phone Extension
licence is required for each integrated mobile
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 set-
ting 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 re-
ceivers.
•
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
). If
this is not sufficient, additional senders/receivers can be configured with this
setting.