У нас очередной срочный вопрос. Можно ли узнать параметры вызывного сигнала, на который отвечает DVG-шка. Уже на нескольких шлюзах мы наблюдаем ситуацию, когда шлюз может не отвечать на звонки или отвечать не сразу. Предполагаем что вызывной сигнал нашей телефонной станции находится где-то на границе понимания шлюза и срабатывает/не срабатывает он чисто случайно. Так что важно сравнить частоту вызывного сигнала, уровень, форму и длительность с параметрам нашей АТС.

1. Используйте команду debug для определения нестыковок...
2. Используйте tone комманду для подстройки тональных сигналов

4.2 How to configure disconnect tone on DVG-1104TH gateway
DVG-1104TH has a default setting of disconnect tone (Busy tone 1, Busy tone 2, reorder tone 1 and reorder tone 2 ). If the disconnect tone was recognized correctly, the LINE port from PSTN/PBX will be released in two seconds. Otherwise it may be released after one minute or lock this LINE permanently.
The tone table parameters are shown as follows.
LowFreq 480 Low frequency is 480 HZ HighFreq 620 High frequency is 620 HZ LowFreqLevel 8 Low frequency level received range from PSTN/PBX HighFreqLevel 8 High frequency level received range from PSTN/PBX TOn1 50 Disconnect tone cadence ON time is 0.5 seconds TOff1 50 Disconnect tone cadence OFF time is 0.5 seconds ( If this is continuous tone, the Toff has to set to 1023 ) TOn2 1023 Disconnect tone second cycle cadence ON time is OFF TOff2 1023 Disconnect tone second cycle cadence OFF time is OFF ( If the tone cadence has only one cycle, the second cycle must set to 1023 )
(1) Examples how to configure Tone table
a. 480/620 frequency with ON/OFF time is 0.5 seconds
tone -busy1 480 620 8 8 50 50 1023 1023
b. 480 HZ single frequency with continuous tone
tone –reorder2 480 0 8 0 50 1023 1023 1023



4.3 Adjust Tone Table parameters manually
If the gateway still cannot release the LINE port in two seconds, try to adjust the frequency by 1 hz on tone table. For example, your analysis value is 620/480, take the following procedures.
620/479
620/480
620/481
621/479
621/480
621/481
619/479
619/480
619/481
If the LINE port of gateway was locked, please use “hangup 0” command to release LINE 1, “hanhup 3” to release LINE 4.
4.4 Adjust Input Tone Level
Sometimes the disconnect tone level is too low to detect by DVG-1104TH You can increase input gain from the following command.
voice -volume input xx
commit
reboot
xy is the input gain parameters. The maximum number is 35. if the number is over 35, the echo may be happened. Once you increase input gain, the voice volume from PSTN to IP side is increased too.




5.17 [tone] command
Tone detection of DVG-1104TH is configurable if the bureau line is connected to PABX or PSTN. Users can refer to “greetrd” command for tone recording and analysis. Sometimes the frequencies might shift from standard level. In such a situation, users have to adjust the tone value manually using this command.
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usr/config$ tone
Setup of call progress tones
Usage:
tone -toneX LowFreq HighFreq LowFreqLevel HighFreqLevel TOn1 TOff1 TOn2 TOff2
tone -print
Note:
toneX has the following possibility:
busy1 busy2 reorder1 reorder2 ringtone1 ringtone2 dialtone
Example:
tone -busy1 400 0 8 0 50 50 0 0
tone -dialtone 400 0 19 0 25 25 0 0


5.20 [bureau] command
Type bureau to display the command usage.
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usr/config$ bureau
Bureau line setting information and configuration
Usage:
bureau [-pstn number] [-hold used] [-table [Port DestIP TELnum]]
bureau -print
-print Display Bureau line informatio and configuration.
-pstn PSTN number (per port basis). This number is used to display
as a caller ID when the caller ID is not available.
The maximum digit length is 32.
-hold Specify the hold tone generation (using PCM file). (On/Off)
Setting value (On=1, Off=0).
-table Set Hot line/Line To Line information. (Port range: 1~2)
Note:
Hotline feature should be used together with:
$sysconf -service 2 (HotLine service)
$sysconf -2nddial 0 (2nddial off)
$h323 -mode 1 (peer-to-peer mode)
Line To Line feature should be used together with:
$sysconf -service 2 (HotLine service/Line To Line )
$sysconf -2nddial 1 (2nddial on)
$h323 -mode 1 (peer-to-peer mode)
Example:
bureau -pstn 2011 2012
bureau -table 1 192.168.4.69 628 2 192.168.4.200 9992
Parameter Usages:
- print: display bureau line information and configuration.
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usr/config$ bureau -print
Bureau line setting relate information
PSTN number : 2011 2012 2013 2014 2015 2016
Hold tone generation : On
Hot line / Line to Line table
=====================================================
Port Destination Address Remote TEL/CHANNEL
--------------------------------------------------------------------------------------------------
1 192.168.4.69 628
2 192.168.4.69 628
======================================================
- pstn: PSTN number (per port basis). This number is used to display as a caller ID when the caller ID is not available. The maximum digit length is 32.
- hold: while the terminals support H.450 hold function, the DVG-1104TH will play the hold tone to PSTN side.
- table: Set Hot line/LineToLine destination IP and e164 numbers information. (Port range: 1~2)

не совсем то, что нам нужно. совсем не то. Шлюз у нас подключен к мини АТС в качестве внутреннего номера. Мы звоним на шлюз, станция подаёт на его аналоговый порт некоторое вызывное напряжение, но шлюз на вызов не отвечает. Как будто он это напряжение не считает вызывным. Вот и нтересуют электрические характеристики сигнала, который нужно подать на аналоговый телефонный порт шлюза чтобы он поднял трубку.
debug здесь не помогает, так как в этой ситуации шлюз в него ничего не пишет.