имеется 2 посторонних шума. 1 непрырывный треск, 2 треск при разговоре.

звоним с envox на asterisk по e1. шум слышно только со стороны asterisk. плата TE205P без эхо подавления (оба сервера стоят рядом).

как видно конфликтов irq нет
File: interrupts
CPU0
0: 7252830 IO-APIC-edge timer
1: 12 IO-APIC-edge i8042
6: 6 IO-APIC-edge floppy
8: 1 IO-APIC-edge rtc
9: 1 IO-APIC-level acpi
12: 4 IO-APIC-edge i8042
14: 0 IO-APIC-edge ata_piix
15: 0 IO-APIC-edge ata_piix
193: 24015 IO-APIC-level 3w-xxxx
201: 7198493 IO-APIC-level wct2xxp
209: 29315 PCI-MSI eth0
NMI: 0
LOC: 7252218
ERR: 0
MIS: 0

в логах переодически вылезает сообщение
chan_dahdi.c: PRI got event: HDLC Abort (6) on Primary D-channel of span 1

/etc/dahdi/system.conf
span=1,0,0,ccs,hdb3,crc4
bchan=1-15,17-31
dchan=16
echocanceller=mg2,1-15,17-31
alaw=1-15,17-31

dahdi-channels.conf
; Span 1: TE2/0/1 "T2XXP (PCI) Card 0 Span 1" (MASTER) HDB3/CCS/CRC4
group=0,11
context=from-pstn
switchtype = qsig
signalling = pri_net
channel => 1-15,17-31
alaw=1-15,17-31
context = default
group = 63

подскажите куда копать?

включил дебаг.
вот что пишет в консоле
-- Accepting call from '' to '79264522522' on channel 0/1, span 1
-- Executing [79264522522@from-pstn:1] Macro("DAHDI/1-1", "exten-vm,novm,79264522522") in new stack
-- Executing [s@macro-exten-vm:1] Macro("DAHDI/1-1", "user-callerid") in new stack
-- Executing [s@macro-user-callerid:1] Set("DAHDI/1-1", "AMPUSER=") in new stack
-- Executing [s@macro-user-callerid:2] GotoIf("DAHDI/1-1", "0?report") in new stack
-- Executing [s@macro-user-callerid:3] ExecIf("DAHDI/1-1", "1?Set(REALCALLERIDNUM=)") in new stack
-- Executing [s@macro-user-callerid:4] Set("DAHDI/1-1", "AMPUSER=") in new stack
-- Executing [s@macro-user-callerid:5] Set("DAHDI/1-1", "AMPUSERCIDNAME=") in new stack
-- Executing [s@macro-user-callerid:6] GotoIf("DAHDI/1-1", "1?report") in new stack
-- Goto (macro-user-callerid,s,10)
-- Executing [s@macro-user-callerid:10] GotoIf("DAHDI/1-1", "0?continue") in new stack
-- Executing [s@macro-user-callerid:11] Set("DAHDI/1-1", "__TTL=64") in new stack
-- Executing [s@macro-user-callerid:12] GotoIf("DAHDI/1-1", "1?continue") in new stack
-- Goto (macro-user-callerid,s,19)
-- Executing [s@macro-user-callerid:19] NoOp("DAHDI/1-1", "Using CallerID "" <>") in new stack
-- Executing [s@macro-exten-vm:2] Set("DAHDI/1-1", "RingGroupMethod=none") in new stack
-- Executing [s@macro-exten-vm:3] Set("DAHDI/1-1", "VMBOX=novm") in new stack
-- Executing [s@macro-exten-vm:4] Set("DAHDI/1-1", "EXTTOCALL=79264522522") in new stack
-- Executing [s@macro-exten-vm:5] Set("DAHDI/1-1", "CFUEXT=") in new stack
-- Executing [s@macro-exten-vm:6] Set("DAHDI/1-1", "CFBEXT=") in new stack
-- Executing [s@macro-exten-vm:7] Set("DAHDI/1-1", "RT=""") in new stack
-- Executing [s@macro-exten-vm:8] Macro("DAHDI/1-1", "record-enable,79264522522,IN") in new stack
-- Executing [s@macro-record-enable:1] GotoIf("DAHDI/1-1", "1?check") in new stack
-- Goto (macro-record-enable,s,4)
-- Executing [s@macro-record-enable:4] AGI("DAHDI/1-1", "recordingcheck,20100916-132311,1284628991.0") in new stack
-- Launched AGI Script /var/lib/asterisk/agi-bin/recordingcheck
recordingcheck,20100916-132311,1284628991.0: Inbound recording not enabled
-- <DAHDI/1-1>AGI Script recordingcheck completed, returning 0
-- Executing [s@macro-record-enable:5] MacroExit("DAHDI/1-1", "") in new stack
-- Executing [s@macro-exten-vm:9] Macro("DAHDI/1-1", "dial,"",tr,79264522522") in new stack
-- Executing [s@macro-dial:1] GotoIf("DAHDI/1-1", "1?dial") in new stack
-- Goto (macro-dial,s,3)
-- Executing [s@macro-dial:3] AGI("DAHDI/1-1", "dialparties.agi") in new stack
-- Launched AGI Script /var/lib/asterisk/agi-bin/dialparties.agi
dialparties.agi: Starting New Dialparties.agi
dialparties.agi: Caller ID name is 'unknown' number is 'unknown'
dialparties.agi: Methodology of ring is 'none'
-- dialparties.agi: Added extension 79264522522 to extension map
-- dialparties.agi: Extension 79264522522 cf is disabled
-- dialparties.agi: Extension 79264522522 do not disturb is disabled
dialparties.agi: EXTENSION_STATE: 0 (NOT_INUSE)
-- dialparties.agi: DbDel CALLTRACE/79264522522 - Caller ID is not defined
-- dialparties.agi: Filtered ARG3: 79264522522
-- <DAHDI/1-1>AGI Script dialparties.agi completed, returning 0
-- Executing [s@macro-dial:7] Dial("DAHDI/1-1", "SIP/79264522522,"",tr") in new stack
== Using SIP RTP TOS bits 184
== Using SIP RTP CoS mark 5
== Using SIP VRTP TOS bits 136
== Using SIP VRTP CoS mark 6
[Sep 16 13:23:11] DEBUG[21066]: pbx.c:3198 ast_hint_extension: FONALITY: This thread has already held the conlock, skip locking
-- Called 79264522522
-- SIP/79264522522-00000000 is ringing
-- SIP/79264522522-00000000 answered DAHDI/1-1
[Sep 16 13:23:16] DEBUG[21066]: pbx.c:3198 ast_hint_extension: FONALITY: This thread has already held the conlock, skip locking
-- Executing [h@macro-dial:1] Macro("DAHDI/1-1", "hangupcall") in new stack
-- Executing [s@macro-hangupcall:1] GotoIf("DAHDI/1-1", "1?skiprg") in new stack
-- Goto (macro-hangupcall,s,4)
-- Executing [s@macro-hangupcall:4] GotoIf("DAHDI/1-1", "1?skipblkvm") in new stack
-- Goto (macro-hangupcall,s,7)
-- Executing [s@macro-hangupcall:7] GotoIf("DAHDI/1-1", "1?theend") in new stack
-- Goto (macro-hangupcall,s,9)
-- Executing [s@macro-hangupcall:9] Hangup("DAHDI/1-1", "") in new stack
== Spawn extension (macro-hangupcall, s, 9) exited non-zero on 'DAHDI/1-1' in macro 'hangupcall'
== Spawn extension (macro-dial, h, 1) exited non-zero on 'DAHDI/1-1'
== Spawn extension (macro-dial, s, 7) exited non-zero on 'DAHDI/1-1' in macro 'dial'
== Spawn extension (macro-exten-vm, s, 9) exited non-zero on 'DAHDI/1-1' in macro 'exten-vm'
== Spawn extension (from-pstn, 79264522522, 1) exited non-zero on 'DAHDI/1-1'
-- Executing [h@from-pstn:1] Hangup("DAHDI/1-1", "") in new stack
== Spawn extension (from-pstn, h, 1) exited non-zero on 'DAHDI/1-1'
-- Hungup 'DAHDI/1-1'
[Sep 16 13:23:22] DEBUG[21066]: pbx.c:3198 ast_hint_extension: FONALITY: This thread has already held the conlock, skip locking

думаю стоит в таких случаях начать с установки последнего DAHDI из соурс и Астериска.

поставил астериск вручную на ubuntu 10.04.
конфиги такие же. шум в потоке не пропал

вот chan_dahdi.conf
[trunkgroups]
[channels]
switchtype = qsig
signalling = pri_net
language=en
context=from-zaptel
signalling=fxs_ks
rxwink=300 ; Atlas seems to use long (250ms) winks
alaw=1-15,17-31
usecallerid=yes
hidecallerid=no
callwaiting=yes
usecallingpres=yes
callwaitingcallerid=yes
threewaycalling=yes
transfer=yes
cancallforward=yes
callreturn=yes
echocancel=no
echocancelwhenbridged=no
;echotraining=800
rxgain=0.0
txgain=0.0
group=0
callgroup=1
pickupgroup=1
immediate=no
faxdetect=no
#include dahdi-channels.conf
group=1

да и еще поменяли сервер полностью и кабель e1.
плата таже. может в плате дело?

может и в плате
а может и в провайдере.

dahdi_test ?

root@asterisk:/etc/dahdi# dahdi_test
Opened pseudo dahdi interface, measuring accuracy...
99.999% 99.998% 99.998% 99.998% 100.000% 99.999% 99.999% 99.998% ^C
--- Results after 8 passes ---
Best: 100.000 -- Worst: 99.998 -- Average: 99.998512, Difference: 99.999439

Кроме Q.SIG нельзя ничего использовать ? хоть карту чтоб проверить и убедиться в чем проблема.

проблема решилась настройкой параметра crc на envox