
Voice Connections at the Point-To-Point Connection
i-modul ISDN HIX V4
15
Voice Connections at the Point-To-Point
Connection
If the i-modul ISDN HIX V4 is operated at an ISDN point-to-point connection (refer
to connection Configuration of the i-modul ISDN HIX V4 at the ISDN Basic Access),
the following notes must be observed.
15.1
Incoming Voice Call
An incoming call is indicated by the
RING
message. Additionally, dialled numbers,
which are received later, are indicated by the
INFO
message (overlapping entry). If
the received number is complete, the application has to send a request alarm mes-
sage, which initiates the ringing tone for the caller.
:1RINGI1D224422O888B01
Incoming call received at ISDN access
224422
:1INFOI1D9
Next received dialled number "9"
AT:1RAI1
Initiate alarm request
15.2
Outgoing Voice Call
An outgoing call has to be initiated with the command
AT:1CRxxx
. There is no dif-
ference to call handling at a point-to-multipoint connection. An overlapping send-
ing is performed using the commands:
AT:1 CRDxxx
Sending first connection request and
AT:1 CC I1 D2
sending next numbers to be dialled
66