3Com V7111 - VCX 4 Channels Analog FXO Media Gateway User Manual
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3Com VCX V7111 VoIP SIP Gateways User Manual 95 Second Signal Off Time [10 msec] – Signal Off period (in 10 ms units) for thesecond cadence on-off cycle.Using this configuration file, you can create up to 16 different call progress tones using up to15 different frequencies (in the range from 300 Hz through 2000 Hz). Each one of the callprogress tones is specified by the following two parameters: the tone frequency (either singleor dual frequencies are supported) and the tone cadence. This is specified by two sets ofON/OFF periods, but you can discard the use of the first On/Off cycle by setting the relevantparameters to zero. When the tone is made up of a single frequency, the second frequencyfield should be set to zero.For a continuous tone (such as dial tone), only the First Signal On time should be specified.In this case, the parameter specifies the detection period. For example if it equals 300, thenthe tone is detected after 3 seconds (300 x 10 ms).When defining several continuous tones, the First Signal On Time parametershould have the same value for all tones.The tones frequency should differ by at least 40 Hz from one tone to other definedtones.Default Template for Call Progress TonesThe VCX V7111 is initialized with the default Call Progress Tones configuration templateshown in Table 20. If you need to change one of the tones, edit the default call progress.txtfile.For example: to change the dial tone to 440 Hz only, replace the #Dial tone section inTable 20 with the following text:#Dial tone[CALL PROGRESS TONE #1]Tone Type=1Low Freq [Hz]=440High Freq [Hz]=0Low Freq Level [-dBm]=10 (-10 dBm)High Freq Level [-dBm]=32 (use 32 only if a single tone is required)First Signal On Time [10msec]=300; the dial tone is detected after 3 secFirst Signal Off Time [10msec]=0Second Signal On Time [10msec]=0Second Signal Off Time [10msec]=0You can specify several tones of the same type using Tone Type definition. These additionaltones are used only for tone detection. Generation of specific tone is according to the firstdefinition of the specific tone. For example, you can define an additional dial tone byappending the second dial tone definition lines to the tone INI file. The VCX V7111 reportsdial tone detection if either one of the two tones has been detected. |
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