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Gain
Enable Current
Disconnect
Current Disconnect
Threshold (ms)
Enable PSTN Disconnect
Tone Detection
PSTN Disconnect Tone
AC Termination Model
Country-Based
Impedance-Based
Number of Rings
FIRMWARE VERSION 1.0.12.4
this time value to prevent unwanted activation of the Flash/Hold and automatic phone
ring-back.
Voice path volume adjustment.
•
RX is a gain level for signals transmitted by FXO (FXO-To-VoIP volume ) ,
TX is a gain level for signals received by FXO( FXO-To-PSTN volume).
•
Default = 0dB for both parameters. Loudest volume: +6dB; Lowest volume: -6dB.
User can adjust volume of call on either end using the Rx Gain Level parameter and
the Tx Gain Level parameter located on the FXO Port Configuration page. These
parameters affects call volume ONLY for calls placed to/from PSTN and VoIP networks.
If call volume is too low when using VoIP extension, adjust volume using the Rx Gain
Level parameter under the FXO Port Configuration page.
If voice volume is too low at the other end (PSTN side), user may increase the far end
volume using the Tx Gain Level parameter under the FXO Port Configuration page.
Default is Yes. This value should be used in case the PSTN provider uses line power
drop to indicate call completion to the end point. In this case the HT503 will search for
a power drop for a preconfigured time frame to disconnect such calls from a VoIP
extension.
This is a preconfigured value of duration for a line power drop used by specific service
providers. For example, for a configured value of 500ms the device will ignore any
random voltage drops on the line if duration of such drop is less than 500ms and the
call will NOT be considered as terminated. This is useful to prevent unnecessary call
drops in some low quality PSTN lines.
If set to Yes, arrived Busy Tone is used as the disconnect signal.
In certain countries, the central office will send a special busy tone to indicate when a
call is disconnected from the remote side. User can pre-configure this tone on the ATA.
The user should know the frequency values and cadences of these tones.
Here is an example for the syntax for a busy tone in the U.S.A:
(Syntax: f1=freq@vol, f2=freq@vol, c=on1/off1-on2/off2-on3/off3;)
(Note: freq: 0 - 4000Hz; vol: -30 - 0dBm)
(Default: Busy Tone - f1=480@-24,f2=620@-24,c=500/500;)
Note : Maximum supported cadences is 3
You can select the AC termination by Country or by Impedance.
15 Countries are selectable in this version of the F/W.
Select the Impedance used by the PSTN service provider.
Default is 4. This setting specifies number of phone rings (on the phone connected to
HT503 USER MANUAL
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