Correlator Data checksum

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Galileon
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Posts: 1
Joined: 03 Nov 2010 08:15

Correlator Data checksum

Post by Galileon » 03 Nov 2010 08:19

Hi,

I am trying to send a collelator data for CSTA via ISDN user-user message.
User-User i encoded properly:

| IE:[04] BEARER_CAPABILITY (l=3) 80 90 a3
| IE:[18] CHANNEL (l=3) a9 83 9c -> T2 : B channel 28 exclusive
| IE:[1e] PROGRESS_ID (l=2) 80 83
| IE:[6c] CALLING_NUMBER (l=9) -> 01 a1 Num : 8883002
| IE:[7d] HLC (l=2) 91 81
| IE:[7e] USER_USER (l=37) 00 45 : CSTA
| [80] Correlator Data (l=32):
| 5a c0 30 31 32 33 34 35 36 37 38 39 30 31 32 33 : 'Z.01234567890123'
| 34 35 36 37 38 39 30 31 32 33 34 35 36 37 38 39 : '4567890123456789'


But i have a big problem with checksum at the end. I dont know how to calculate it :(

Have tried with crc8 and similar methods but the result always is not as al required.

Proper checksum for data above is 0x7e
Do You have some idea?



Best Regards
Galileon

krzysioD
Alcatel Unleashed Certified Guru
Alcatel Unleashed Certified Guru
Posts: 1157
Joined: 30 Aug 2006 13:43
Location: Europe, Poland

Post by krzysioD » 05 Nov 2010 16:30

Networked Correlator Data, ALU's document ref no 3BA 19598 CKAA :rolleyes:
need some more than BPWS to access this, so I don't post it here.

vsc77420
Member
Posts: 3
Joined: 07 Apr 2009 12:19

Re: Correlator Data checksum

Post by vsc77420 » 13 Sep 2011 11:28

Hello krzysioD ,

I have an issue when moving from ISDN to businesstalkip , I need to transmit correlator data and maybe your document can answer me.
Could you please send it to me by mail vsc77420@gmail.com?

thanks

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