[asterisk-r2] Strange problems - Telco?

[Edison Sprandel - ABYZ TI]

Hi, I`m looking asterisk logs, because people continue to claim that the calls hung up sometimes, and look what i see:

[Mar 16 10:22:33] DEBUG[2866] chan_dahdi.c: Chan 11 - CAS Rx << [BLOCK] 0x0C
[Mar 16 10:22:33] NOTICE[2866] chan_dahdi.c: Far end blocked on chan 11
[Mar 16 10:22:33] DEBUG[2866] chan_dahdi.c: Chan 12 - Bits changed from 0x08 to 0x0C
[Mar 16 10:22:33] DEBUG[2866] chan_dahdi.c: Chan 12 - CAS Rx << [BLOCK] 0x0C
[Mar 16 10:22:33] NOTICE[2866] chan_dahdi.c: Far end blocked on chan 12
[Mar 16 10:22:33] DEBUG[2866] chan_dahdi.c: Chan 13 - Bits changed from 0x08 to 0x0C
[Mar 16 10:22:33] DEBUG[2866] chan_dahdi.c: Chan 13 - CAS Rx << [BLOCK] 0x0C
[Mar 16 10:22:33] NOTICE[2866] chan_dahdi.c: Far end blocked on chan 13
[Mar 16 10:22:33] DEBUG[2866] chan_dahdi.c: Chan 14 - Bits changed from 0x08 to 0x0C
[Mar 16 10:22:33] DEBUG[2866] chan_dahdi.c: Chan 14 - CAS Rx << [BLOCK] 0x0C
[Mar 16 10:22:33] NOTICE[2866] chan_dahdi.c: Far end blocked on chan 14
[Mar 16 10:22:33] DEBUG[2866] chan_dahdi.c: Chan 1 - Bits changed from 0x08 to 0x0C
[Mar 16 10:22:33] DEBUG[2866] chan_dahdi.c: Chan 1 - CAS Rx << [BLOCK] 0x0C
[Mar 16 10:22:33] NOTICE[2866] chan_dahdi.c: Far end blocked on chan 1
[Mar 16 10:22:33] DEBUG[2866] chan_dahdi.c: Chan 2 - Bits changed from 0x08 to 0x0C
[Mar 16 10:22:33] DEBUG[2866] chan_dahdi.c: Chan 2 - CAS Rx << [BLOCK] 0x0C
[Mar 16 10:22:33] NOTICE[2866] chan_dahdi.c: Far end blocked on chan 2
[Mar 16 10:22:33] DEBUG[2866] chan_dahdi.c: Chan 3 - Bits changed from 0x08 to 0x0C
[Mar 16 10:22:33] DEBUG[2866] chan_dahdi.c: Chan 3 - CAS Rx << [BLOCK] 0x0C
[Mar 16 10:22:33] NOTICE[2866] chan_dahdi.c: Far end blocked on chan 3
[Mar 16 10:22:33] DEBUG[2866] chan_dahdi.c: Chan 4 - Bits changed from 0x08 to 0x0C
[Mar 16 10:22:33] DEBUG[2866] chan_dahdi.c: Chan 4 - CAS Rx << [BLOCK] 0x0C
[Mar 16 10:22:33] NOTICE[2866] chan_dahdi.c: Far end blocked on chan 4
[Mar 16 10:22:33] DEBUG[2866] chan_dahdi.c: Chan 5 - Bits changed from 0x08 to 0x0C
[Mar 16 10:22:33] DEBUG[2866] chan_dahdi.c: Chan 5 - CAS Rx << [BLOCK] 0x0C
[Mar 16 10:22:33] NOTICE[2866] chan_dahdi.c: Far end blocked on chan 5
[Mar 16 10:22:33] DEBUG[2866] chan_dahdi.c: Chan 6 - Bits changed from 0x08 to 0x0C
[Mar 16 10:22:33] DEBUG[2866] chan_dahdi.c: Chan 6 - CAS Rx << [BLOCK] 0x0C
[Mar 16 10:22:33] NOTICE[2866] chan_dahdi.c: Far end blocked on chan 6
[Mar 16 10:22:33] DEBUG[2866] chan_dahdi.c: Chan 7 - Bits changed from 0x08 to 0x0C
[Mar 16 10:22:33] DEBUG[2866] chan_dahdi.c: Chan 7 - CAS Rx << [BLOCK] 0x0C
[Mar 16 10:22:33] NOTICE[2866] chan_dahdi.c: Far end blocked on chan 7
[Mar 16 10:22:33] DEBUG[2866] chan_dahdi.c: Chan 1 - Bits changed from 0x0C to 0x08
[Mar 16 10:22:33] DEBUG[2866] chan_dahdi.c: Chan 1 - CAS Rx << [IDLE] 0x08
[Mar 16 10:22:33] NOTICE[2866] chan_dahdi.c: Far end unblocked on chan 1
[Mar 16 10:22:33] DEBUG[2866] chan_dahdi.c: Chan 2 - Bits changed from 0x0C to 0x08

Anyone have similar problems? I'm think the problem is the Telco, what you think?
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