Шлюз подключен к Asterisk (Trixbox). По IP все ок. Если звонок идет через FXO (вход/выход), то через 90 секунд связь просто обрывается, словно на другом конце положили трубку.
Подскажите, где копать.
Спасибо.

Логи slmonitor

10:55:52 *** SLMON start to log ***
10:56:02 [002396] Receive Cmd=1100, ParaLen=5, Para=[Login]
10:56:02 [002396] Login RU_1.00 == Ver(1.02.38.39.2577 2009/06/10 17:39:35) PId(281.DLink.RU.l2tp.DualAccess.NoPrefix.drtp) Drv(0.10.34.1) Hw(TSO) == 0.6.8
10:56:11 [002491] 0: Fxs Pickup
10:56:11 [002491] 0: ==4:GetDtmf
10:56:17 [002546] 0: Fxs Hangup
10:56:17 [002546] 0: ==3:Idle
10:56:17 [002546] 0: SetFax(1)=0
10:58:22 *** SLMON start to log ***
10:58:32 [000601] Receive Cmd=1100, ParaLen=5, Para=[Login]
10:58:32 [000601] Login RU_1.00 == Ver(1.02.38.39.2577 2009/06/10 17:39:35) PId(281.DLink.RU.l2tp.DualAccess.NoPrefix.drtp) Drv(0.10.34.1) Hw(TSO) == 0.6.8
10:58:54 [000820] 0: Fxs Pickup
10:58:54 [000820] 0: ==4:GetDtmf
10:58:58 [000863] 0: Fxs Hangup
10:58:58 [000863] 0: ==3:Idle
10:58:58 [000863] 0: SetFax(1)=0
10:59:00 [000884] 0: Fxs Pickup
10:59:00 [000884] 0: ==4:GetDtmf
10:59:06 [000936] 0: End Input Route [2]
10:59:06 [000936] 0: Line DialNum_New [42038]
10:59:06 [000936] 0: Local Calling Fxo [42038]
10:59:06 [000936] 0: ==7:Inviting
10:59:06 [000936] 0: Get Local Fxo Line 1
10:59:06 [000936] 1: TrunkPrefix=, Dest=42038, Dialno=42038
10:59:06 [000936] 1: FxoHookOff
10:59:06 [000936] 1: SetInputGain(9)
10:59:06 [000937] 1: ==18:TrunkDialOut
10:59:07 [000947] 1: DialOut(42038)=0
10:59:08 [000959] 0: FilterDtmf(0)=0
10:59:08 [000959] 0: Change RTP to 192.168.1.100:30002, pt=0
10:59:08 [000959] 0: RtpApiTalk[1,1], Peer=192.168.1.100:30002, PT=0, FC=4, NewOOB=0
10:59:08 [000959] 1: FilterDtmf(0)=0
10:59:08 [000959] 1: RtpApiTalk[1,1], Peer=192.168.1.100:30000, PT=0, FC=4, NewOOB=0
10:59:08 [000959] 1: Substatus=3
11:00:08 [001559] 1: Wait Fxo Answer Timeout
11:00:08 [001560] 1: ==15:PlayBusyTone
11:00:08 [001560] 0: ==15:PlayBusyTone
11:00:08 [001560] 1: Start Btc Learning
11:00:10 [001575] 1: Btc Learning Exception No Change
11:00:10 [001575] 1: FxoHookOn
11:00:10 [001575] 1: ==3:Idle
11:00:10 [001575] 1: SetInputGain(6)
11:00:10 [001575] 1: SetFax(1)=0
11:00:21 [001689] 0: Fxs Hangup
11:00:21 [001689] 0: ==3:Idle
11:00:21 [001689] 0: SetFax(1)=0

Проверьте, не стоит ли у вас Answer detection?

Стоит Polarity Reversal

Отключите совсем.
90% у вас линия не поддерживает реверс. Или поддерживает?

Отключил, помогло
СПАСИБО !


P.S. Может, подскажете, почему прерывисто разговор идет, если звонят по FXO ? Какие шумодавы и т.п. отрубить ?