Correlator Data checksum

[Galileon]

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]

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]

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