© 2003 - 2005 Sipura Technology, Inc
Proprietary (See Copyright Notice on Page 2)
107
2
nd
one triggers the disconnection. For VoIP gateway
call, the 1
st
polarity reversal triggers the disconnection.
Detect Long
Silence
If enabled, SPA will disconnect both call legs when the
PSTN side has no voice activity for a duration longer
than the length specified in <Long Silence Duration>
during a gateway call
yes Bool
Detect Disconnect
Tone
If enabled, SPA will disconnect both call legs when it
detects the disconnect tone from the PSTN side during a
gateway call. Disconnect tone is specified in the
<Disconnect Tone> parameter, which depends on the
region of the PSTN service.
yes Bool
Long Silence
Duration
This is minimum length of PSTN silence (or inactivity) in
seconds to trigger a gateway call disconnection if
<Detect Long Silence> is “yes”
30 10-255
Silence Threshold
This parameter adjusts the sensitivity of PSTN silence
detection. Choose from {very low, low, medium, high,
very high}. The higher the setting, the easier to detect
silence and hence easier to trigger a disconnection.
medium Choice
Disconnect Tone
This is the tone script which describes to the SPA the
tone to detect as a disconnect tone. The syntax follows a
standard Tone Script with some restrictions. Default
value is standard US reorder (fast busy) tone, for 4
seconds.
Restrictions:
1. 2 frequency components must be given. If single
frequency is desired, the same frequency is used
for both
2. The tone level value is not used. –30 (dBm)
should be used for now.
3. Only 1 segment set is allowed
4. Total duration of the segment set is interpreted
as the minimum duration of the tone to trigger
detection
5. 6 segments of on/off time (seconds) can be
specified. A 10% margin is used to validated
cadence characteristics of the tone
480@-
30,620@-
30;4(.25/.2
5/1+2)
Str255
4.13.7. PSTN Line – International Control
Parameter
Description
Default
Range
FXO Port
Impedance
Desired impedance of the FXO Port. Choose from
{600, 900, 270+
600 Choice
SPA To PSTN
Gain
dB of digital gain (or attenuation if negative) to be
applied to the signal sent from the SPA to the PSTN
side.
0 –15
to
12
PSTN To SPA
Gain
dB of digital gain (or attenuation if negative) to be
applied to the signal sent from the PSTN side to the
SPA.
0 –15
to
12
Tip/Ring Voltage
Adjust
{3.1, 3.2, 3.35, 3.5}
3.5
Choice
Operational Loop
mA {10, 12, 14, 16}
10
Choice
