2N BRI Lite/Enterprise v1.1 - Manual (Page 46)

Call Routing Principles 3.2
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setup. Define the minimum and maximum counts of DTMF digits in the
Incoming GSM calls menu.
 If the gateway does not receive the minimum count of digits and no other
digit comes from the GSM network within the timeout defined in the DTMF
dialling delay, the call is rerouted to the extension included in the List of
extensions.
 If call forwarding to extension is inactive, the incoming call is rejected.
DISA Message
With DISA activated and DISA welcome note recorded, the message is played to every
incoming call whose CLIP is not included in the AutoCLIP table. After playing, the
gateway waits for the first DTMF digit for the time period defined in the Incoming GSM
calls – DTMF dial timeout table. Having received the count of digits defined in the
Incoming GSM calls – Minimum DTMF digits parameter, the gateway activates
connection to the SIP proxy or telephone via the port included in the ISDN parameters
table with the DTMF-received number. You can record the DISA message using the
GSM gateway web interface.
Or, you can record the message using your PC as disa.wav and load it into the
gateway using the configuration program via the web interface.
DISA Recording via PC and Web Interface
The DISA voice message parameters for PC recording are as listed below:
maximum duration of 65s, compression according to ISDN A-law, mono,
sampling frequency of 8kHz. Name the file Disa.wav and load it via the
Gateway control – Voice messages web interface into the gateway.
DISA voice message parameters
Sound format: WAV
Sampling frequency: 8 kHz
Channels: 1 mono
Codec: ISDN A-law