Translating ISDN Simulator Output

Answered Question
Mar 13th, 2007

I am trying to translate the output of our Virtual Console ISDN simulator to identify the telephone number that is being sent out but the messages from our sim do not look right. Can anyone decipher these messages?

PRI:46:04.27 Q931-D-(0)Rx:"0802000A0504039090A21803A183831E0281836C0C21A0333132343332323331307004A1393131"

PRI:46:04.27 Q931-I-(0)SETUP("911")[2]

PRI:46:04.27 Going to connect 0:2(0,000Ah) -> 0:0(1,8001h) 3.1kHz audio

PRI:46:04.27 Q931-D-(0)Tx:"0802800A021803A98383"

PRI:46:04.27 Q931-D-(0)Tx:"080200010504039090A21803A983816C0C21A0333132343332323331307004A1393131740480393131"

PRI:46:04.38 Q931-D-(0)Rx:"08028001021803A98381"

PRI:46:04.38 Q931-I-(0)CALL PROCEEDING

PRI:46:04.38 Q931-D-(0)Tx:"0802800A02"

PRI:46:04.39 Q931-D-(0)Rx:"080280014508028191"

PRI:46:04.39 Q931-I-(0)DISCONNECT

PRI:46:04.39 Q931-D-(0)Tx:"0802800A4508028191"

PRI:46:04.48 Q931-D-(0)Rx:"0802000A7D080381E202140103"

PRI:46:04.48 Q931-I-(0)STATUS

PRI:46:04.52 Q931-D-(0)Rx:"0802000A4D"

PRI:46:04.52 Q931-I-(0)RELEASE

PRI:46:04.52 Q931-D-(0)Tx:"080200014D"

PRI:46:04.52 Q931-D-(0)Tx:"0802800A5A"

PRI:46:04.58 Q931-D-(0)Rx:"080280015A"


I have this problem too.
0 votes
Correct Answer by jgolia about 9 years 10 months ago

Read Between the Threes! :)


Correct Answer by Paolo Bevilacqua about 9 years 10 months ago


looks to that 312 432 2310 is calling 911.

Hope this helps.

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Overall Rating: 5 (2 ratings)
jmaduncan Wed, 03/14/2007 - 06:15

Yes, that is very helpful, thank you. But how can I translate the output? How is it encoded?


Correct Answer
jgolia Wed, 03/14/2007 - 07:50

Read Between the Threes! :)


jmaduncan Wed, 03/14/2007 - 08:00

Thanks, I figured it out right before you answered. I am a bit embarrased that I didn't notice it before now. Is the number 3 a standard spacer for ISDN?

Paolo Bevilacqua Wed, 03/14/2007 - 09:58

No. What you see is hexadecimal representing the string. The numbers are coded in ascii, so 30=0, 31=1, and so forth.

Thanks for the rating!


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