Доброго времени суток!
Прошу помощи в настройке 2х DVG-6400S для соединения 2х же АТС: Samsung 7400 и Panasonic KX-TD816, оба шлюза FXO подключены на внутренние абонентские линии.
Вот такое построение сети

Настраивал по инструкции http://dlink.ru/ru/faq/95/546.html
При наборе номера порта атс слышится 1 гудок и тишина
При звонке на номер со стороны Саратова выскакивают вот такие логи:
16:39:43 *** SLMON start to log ***
16:39:53 [106231] Receive Cmd=1100, ParaLen=5, Para=[Login]
16:39:53 [106231] Login == Ver(1.02.38.43.9367 2009/08/25 17:45:23) PId(242.DLink.NoPrefix.drtp.vlan) Drv(0.9.5.1.1928) Hw(SA7O4) == 0.6.7-1
16:39:58 [106280] 0: Fxo Ringing
16:39:58 [106280] 0: CallerId=
16:39:58 [106280] 0: ==17:WaitAnswerDeviceOk
16:39:58 [106281] 0: HotLineEnabled with [701]
16:39:58 [106281] 0: End Input Default Route [0]
16:39:58 [106281] 0: PhoneBook has GwNo=701, addr=192.168.16.237:5060
16:39:58 [106281] 0: ==7:Inviting
16:39:58 [106281] 0: VoIP CallOut, Invite <sip:701@192.168.16.237;user=phone>
16:39:58 [106282] 0: 601=DIALING
16:39:58 [106282] 0: RingTime(36) First Stop
16:39:58 [106283] 0: 601=PROCEEDING
16:39:58 [106286] 0: 601=CONNECTED
16:39:58 [106286] 0: Peer=192.168.32.241:0, PT=8, RecvOnly=0
16:39:58 [106286] 0: FxoHookOff
16:39:58 [106286] 0: SetInputGain(-2)
16:39:58 [106286] 0: RtpApiTalk[1,1], Peer=192.168.32.241:0, PT=8, FC=2, NewOOB=1
16:39:58 [106286] 0: ==14:Talking
16:40:00 [106307] 0: Get(1)
16:40:01 [106312] 0: Get(0)
16:40:01 [106316] 0: Get(1)
16:40:10 [106402] 0: 601=DISCONNECT
16:40:10 [106402] 0: Release Active Dlg
16:40:10 [106402] 0: ==15:PlayBusyTone
16:40:13 [106433] DSP_ch0_check=0
16:40:13 [106433] 0: FxoHookOn
16:40:13 [106433] 0: ==3:Idle
16:40:13 [106433] 0: SetInputGain(4)
16:40:13 [106433] 0: SetFax(1)=0

Со стороны Самары:
16:41:50 *** SLMON start to log ***
16:42:00 [107331] Receive Cmd=1100, ParaLen=5, Para=[Login]
16:42:00 [107331] Login == Ver(1.02.38.43.9367 2009/08/25 17:45:23) PId(242.DLink.NoPrefix.drtp.vlan) Drv(0.9.5.1.1928) Hw(SA7O4) == 0.6.7-1
16:42:06 [107382] 0: 701=OFFERING
16:42:06 [107382] 0: Get CallerId=601
16:42:06 [107382] 0: Peer=192.168.16.241:11148, PT=8, RecvOnly=0
16:42:06 [107382] 0: TrunkPrefix=, Dest=, Dialno=
16:42:06 [107382] 0: FxoHookOff
16:42:06 [107382] 0: SetInputGain(-2)
16:42:06 [107382] 0: ==18:TrunkDialOut
16:42:06 [107383] 0: Fxo DialOut OK
16:42:06 [107384] 0: 701=ACCEPT
16:42:06 [107384] 0: ==13:VoipAnswering
16:42:06 [107386] 0: 701=CONNECTED
16:42:06 [107386] 0: RtpApiTalk[1,1], Peer=192.168.16.241:11148, PT=8, FC=2, NewOOB=1
16:42:06 [107386] 0: ==14:Talking
16:42:17 [107493] 0: Fxo Detected CPT Busy(5)
16:42:17 [107493] DSP_ch0_check=0
16:42:17 [107493] 0: FxoHookOn
16:42:17 [107493] 0: Bye at Talking
16:42:17 [107494] 0: ==15:PlayBusyTone
16:42:17 [107494] DSP_ch0_check=0
16:42:17 [107494] 0: FxoHookOn
16:42:17 [107494] 0: ==3:Idle
16:42:17 [107494] 0: SetInputGain(4)
16:42:17 [107494] 0: SetFax(1)=0
16:42:17 [107495] 0: 701=DISCONNECT
16:42:17 [107495] 0: Release Old Dlg #2

Что я делаю не так?

Advanced options --> Enable out of band dtmf включите и поставьте его на sip info

Был включен на обоих шлюзах, переставил в SIP_INFO. Теперь после донабора номера начинаются "2 коротких гудка, пауза" до бесконечности.
Саратов
18:03:52 *** SLMON start to log ***
18:04:03 [010130] Receive Cmd=1100, ParaLen=5, Para=[Login]
18:04:03 [010130] Login == Ver(1.02.38.43.9367 2009/08/25 17:45:23) PId(242.DLink.NoPrefix.drtp.vlan) Drv(0.9.5.1.1928) Hw(SA7O4) == 0.6.7-1
18:04:07 [010171] 0: Fxo Ringing
18:04:07 [010171] 0: CallerId=
18:04:07 [010171] 0: ==17:WaitAnswerDeviceOk
18:04:07 [010172] 0: HotLineEnabled with [701]
18:04:07 [010172] 0: End Input Default Route [0]
18:04:07 [010172] 0: PhoneBook has GwNo=701, addr=192.168.16.237:5060
18:04:07 [010172] 0: ==7:Inviting
18:04:07 [010172] 0: VoIP CallOut, Invite <sip:701@192.168.16.237;user=phone>
18:04:07 [010173] 0: 601=DIALING
18:04:07 [010173] 0: RingTime(36) First Stop
18:04:07 [010174] 0: 601=PROCEEDING
18:04:07 [010177] 0: 601=CONNECTED
18:04:07 [010177] 0: Peer=192.168.32.241:12316, PT=8, RecvOnly=0
18:04:07 [010177] 0: FxoHookOff
18:04:07 [010177] 0: SetInputGain(-2)
18:04:07 [010177] 0: RtpApiTalk[1,1], Peer=192.168.32.241:12316, PT=8, FC=2, NewOOB=0
18:04:07 [010177] 0: ==14:Talking
18:04:09 [010197] 0: Get(1)
18:04:10 [010201] 0: Get(0)
18:04:10 [010205] 0: Get(1)
18:05:23 [010937] 0: Fxo Detected BTC(0)
18:05:23 [010937] 0: Bye at Talking
18:05:23 [010938] 0: ==15:PlayBusyTone
18:05:23 [010938] DSP_ch0_check=0
18:05:23 [010938] 0: FxoHookOn
18:05:23 [010938] 0: ==3:Idle
18:05:23 [010938] 0: SetInputGain(4)
18:05:23 [010938] 0: SetFax(1)=0
18:05:23 [010939] 0: 601=DISCONNECT
18:05:23 [010939] 0: Release Old Dlg #2

Самара
18:07:24 *** SLMON start to log ***
18:07:34 [011856] Receive Cmd=1100, ParaLen=5, Para=[Login]
18:07:34 [011856] Login == Ver(1.02.38.43.9367 2009/08/25 17:45:23) PId(242.DLink.NoPrefix.drtp.vlan) Drv(0.9.5.1.1928) Hw(SA7O4) == 0.6.7-1
18:07:41 [011926] 0: 701=OFFERING
18:07:41 [011926] 0: Peer=192.168.16.241:11176, PT=8, RecvOnly=0
18:07:41 [011926] 0: FxoHookOff
18:07:41 [011926] 0: Get CallerId=601
18:07:41 [011926] 0: TrunkPrefix=, Dest=, Dialno=
18:07:41 [011926] 0: SetInputGain(-2)
18:07:41 [011926] 0: ==18:TrunkDialOut
18:07:41 [011927] 0: Fxo DialOut OK
18:07:41 [011927] 0: 701=ACCEPT
18:07:41 [011928] 0: ==13:VoipAnswering
18:07:41 [011930] 0: 701=CONNECTED
18:07:41 [011930] 0: ==14:Talking
18:07:41 [011930] 0: RtpApiTalk[1,1], Peer=192.168.16.241:11176, PT=8, FC=2, NewOOB=0
18:07:44 [011953] 0: Play(1)
18:07:44 [011957] 0: Play(0)
18:07:45 [011961] 0: Play(1)
18:08:02 [012131] 0: Release Active Dlg
18:08:02 [012131] 0: 701=DISCONNECT
18:08:02 [012131] 0: ==15:PlayBusyTone
18:08:02 [012131] 0: Start Btc Learning
18:08:04 [012153] DSP_ch0_check=0
18:08:04 [012153] 0: FxoHookOn
18:08:04 [012153] 0: SetFax(1)=0
18:08:04 [012153] 0: Btc Learning Exception No Change
18:08:04 [012153] 0: ==3:Idle
18:08:04 [012153] 0: SetInputGain(4)

Если звонить из Самары, то в Саратове слышно голос в трубке.
Лог данной сессии
Саратов
18:11:06 *** SLMON start to log ***
18:11:16 [014468] Receive Cmd=1100, ParaLen=5, Para=[Login]
18:11:16 [014468] Login == Ver(1.02.38.43.9367 2009/08/25 17:45:23) PId(242.DLink.NoPrefix.drtp.vlan) Drv(0.9.5.1.1928) Hw(SA7O4) == 0.6.7-1
18:24:45 [022555] 0: 601=OFFERING
18:24:45 [022555] 0: Get CallerId=701
18:24:45 [022555] 0: Peer=192.168.32.241:12322, PT=0, RecvOnly=0
18:24:45 [022555] 0: TrunkPrefix=, Dest=, Dialno=
18:24:45 [022555] 0: FxoHookOff
18:24:45 [022555] 0: SetInputGain(-2)
18:24:45 [022555] 0: ==18:TrunkDialOut
18:24:45 [022556] 1: 602=OFFERING
18:24:45 [022556] 1: Get CallerId=702
18:24:45 [022557] 1: Peer=192.168.32.241:12326, PT=0, RecvOnly=0
18:24:45 [022557] 1: TrunkPrefix=, Dest=, Dialno=
18:24:45 [022557] 1: FxoHookOff
18:24:45 [022557] 1: SetInputGain(-2)
18:24:45 [022557] 1: ==18:TrunkDialOut
18:24:45 [022558] 2: 603=OFFERING
18:24:45 [022558] 2: Get CallerId=703
18:24:45 [022558] 2: Peer=192.168.32.241:12328, PT=0, RecvOnly=0
18:24:45 [022558] 2: TrunkPrefix=, Dest=, Dialno=
18:24:45 [022558] 2: FxoHookOff
18:24:45 [022558] 2: SetInputGain(-2)
18:24:45 [022558] 2: ==18:TrunkDialOut
18:24:45 [022558] 0: Fxo DialOut OK
18:24:45 [022559] 0: 601=ACCEPT
18:24:45 [022559] 0: ==13:VoipAnswering
18:24:45 [022560] 1: Fxo DialOut OK
18:24:45 [022560] 1: 602=ACCEPT
18:24:45 [022560] 1: ==13:VoipAnswering
18:24:45 [022561] 2: Fxo DialOut OK
18:24:46 [022561] 2: 603=ACCEPT
18:24:46 [022562] 2: ==13:VoipAnswering
18:24:46 [022562] 0: 601=CONNECTED
18:24:46 [022562] 0: RtpApiTalk[1,1], Peer=192.168.32.241:12322, PT=0, FC=2, NewOOB=0
18:24:46 [022562] 0: ==14:Talking
18:24:46 [022562] 1: 602=CONNECTED
18:24:46 [022563] 1: RtpApiTalk[1,1], Peer=192.168.32.241:12326, PT=0, FC=2, NewOOB=0
18:24:46 [022563] 1: ==14:Talking
18:24:46 [022564] 2: 603=CONNECTED
18:24:46 [022564] 2: RtpApiTalk[1,1], Peer=192.168.32.241:12328, PT=0, FC=2, NewOOB=0
18:24:46 [022564] 2: ==14:Talking
18:24:48 [022589] 1: Fxo Detected BTC(0)
18:24:48 [022589] DSP_ch1_check=0
18:24:48 [022589] 1: FxoHookOn
18:24:48 [022589] 1: Bye at Talking
18:24:48 [022589] 1: ==15:PlayBusyTone
18:24:48 [022589] 2: Fxo Detected BTC(0)
18:24:48 [022589] DSP_ch2_check=0
18:24:48 [022589] 2: FxoHookOn
18:24:48 [022589] 2: Bye at Talking
18:24:48 [022590] 2: ==15:PlayBusyTone
18:24:48 [022590] DSP_ch1_check=0
18:24:48 [022590] 1: FxoHookOn
18:24:48 [022590] 1: ==3:Idle
18:24:49 [022590] 1: SetInputGain(4)
18:24:49 [022590] 1: SetFax(1)=0
18:24:49 [022591] DSP_ch2_check=0
18:24:49 [022591] 2: FxoHookOn
18:24:49 [022591] 2: ==3:Idle
18:24:49 [022591] 2: SetInputGain(4)
18:24:49 [022591] 2: SetFax(1)=0
18:24:49 [022591] 1: 602=DISCONNECT
18:24:49 [022591] 1: Release Old Dlg #2
18:24:49 [022592] 2: 603=DISCONNECT
18:24:49 [022592] 2: Release Old Dlg #2
18:25:20 [022906] 0: Fxo Detected BTC(0)
18:25:20 [022906] DSP_ch0_check=0
18:25:20 [022906] 0: FxoHookOn
18:25:20 [022906] 0: Bye at Talking
18:25:20 [022906] 0: ==15:PlayBusyTone
18:25:20 [022907] DSP_ch0_check=0
18:25:20 [022907] 0: FxoHookOn
18:25:20 [022907] 0: ==3:Idle
18:25:20 [022907] 0: SetInputGain(4)
18:25:20 [022907] 0: SetFax(1)=0
18:25:20 [022908] 0: 601=DISCONNECT
18:25:20 [022908] 0: Release Old Dlg #2


Самара
18:11:26 *** SLMON start to log ***
18:11:36 [014277] Receive Cmd=1100, ParaLen=5, Para=[Login]
18:11:36 [014277] Login == Ver(1.02.38.43.9367 2009/08/25 17:45:23) PId(242.DLink.NoPrefix.drtp.vlan) Drv(0.9.5.1.1928) Hw(SA7O4) == 0.6.7-1
18:24:44 [022159] 0: Fxo Ringing
18:24:44 [022159] 0: CallerId=
18:24:44 [022159] 1: Fxo Ringing
18:24:44 [022160] 1: CallerId=
18:24:44 [022160] 2: Fxo Ringing
18:24:44 [022160] 2: CallerId=
18:24:44 [022159] 0: ==17:WaitAnswerDeviceOk
18:24:44 [022160] 1: ==17:WaitAnswerDeviceOk
18:24:44 [022160] 2: ==17:WaitAnswerDeviceOk
18:24:44 [022160] 0: ==7:Inviting
18:24:45 [022160] 1: ==7:Inviting
18:24:45 [022160] 0: HotLineEnabled with [601]
18:24:45 [022160] 0: End Input Default Route [0]
18:24:45 [022160] 0: PhoneBook has GwNo=601, addr=192.168.32.237:5060
18:24:45 [022160] 1: HotLineEnabled with [602]
18:24:45 [022160] 1: End Input Default Route [0]
18:24:45 [022160] 2: ==7:Inviting
18:24:45 [022160] 1: PhoneBook has GwNo=602, addr=192.168.32.237:5060
18:24:45 [022160] 2: HotLineEnabled with [603]
18:24:45 [022160] 0: VoIP CallOut, Invite <sip:601@192.168.32.237;user=phone>
18:24:45 [022160] 2: End Input Default Route [0]
18:24:45 [022160] 2: PhoneBook has GwNo=603, addr=192.168.32.237:5060
18:24:45 [022161] 0: 701=DIALING
18:24:45 [022162] 1: VoIP CallOut, Invite <sip:602@192.168.32.237;user=phone>
18:24:45 [022163] 1: 702=DIALING
18:24:45 [022164] 2: 703=DIALING
18:24:45 [022165] 0: RingTime(64) First Stop
18:24:45 [022165] 1: RingTime(65) First Stop
18:24:45 [022165] 2: RingTime(64) First Stop
18:24:45 [022165] 0: 701=PROCEEDING
18:24:45 [022166] 1: 702=PROCEEDING
18:24:45 [022168] 2: 703=PROCEEDING
18:24:45 [022171] 0: 701=CONNECTED
18:24:45 [022171] 0: FxoHookOff
18:24:45 [022171] 0: ==14:Talking
18:24:45 [022171] 0: Peer=192.168.16.241:11186, PT=0, RecvOnly=0
18:24:46 [022171] 0: SetInputGain(-2)
18:24:46 [022171] 0: RtpApiTalk[1,1], Peer=192.168.16.241:11186, PT=0, FC=2, NewOOB=0
18:24:46 [022172] 1: 702=CONNECTED
18:24:46 [022172] 1: FxoHookOff
18:24:46 [022172] 1: ==14:Talking
18:24:46 [022172] 1: Peer=192.168.16.241:11188, PT=0, RecvOnly=0
18:24:46 [022172] 1: SetInputGain(-2)
18:24:46 [022172] 1: RtpApiTalk[1,1], Peer=192.168.16.241:11188, PT=0, FC=2, NewOOB=0
18:24:46 [022173] 2: 703=CONNECTED
18:24:46 [022173] 2: Peer=192.168.16.241:11190, PT=0, RecvOnly=0
18:24:46 [022173] 2: FxoHookOff
18:24:46 [022174] 2: RtpApiTalk[1,1], Peer=192.168.16.241:11190, PT=0, FC=2, NewOOB=0
18:24:46 [022174] 2: ==14:Talking
18:24:46 [022173] 2: SetInputGain(-2)
18:24:48 [022201] 1: Release Active Dlg
18:24:49 [022201] 1: 702=DISCONNECT
18:24:49 [022201] 1: ==15:PlayBusyTone
18:24:49 [022202] 2: Release Active Dlg
18:24:49 [022202] 2: 703=DISCONNECT
18:24:49 [022202] 2: ==15:PlayBusyTone
18:24:52 [022232] DSP_ch1_check=0
18:24:52 [022232] 1: FxoHookOn
18:24:52 [022232] 1: SetFax(1)=0
18:24:52 [022232] 1: ==3:Idle
18:24:52 [022232] 1: SetInputGain(4)
18:24:52 [022233] DSP_ch2_check=0
18:24:52 [022233] 2: FxoHookOn
18:24:52 [022233] 2: SetFax(1)=0
18:24:52 [022233] 2: ==3:Idle
18:24:52 [022233] 2: SetInputGain(4)
18:25:20 [022517] 0: Release Active Dlg
18:25:20 [022517] 0: 701=DISCONNECT
18:25:20 [022517] 0: ==15:PlayBusyTone
18:25:20 [022519] DSP_ch0_check=0
18:25:20 [022519] 0: FxoHookOn
18:25:20 [022519] 0: SetFax(1)=0
18:25:20 [022519] 0: Fxo Detected CPT Busy(10)
18:25:20 [022519] 0: ==3:Idle
18:25:20 [022519] 0: SetInputGain(4)

В данном случае у Вас все работает, шлюз получает тональный набор 101 и удаленный шлюз его воспроизводит.

А голос почему не проходит? Куда копать?

Проверьте маршрутизацию и nat

Большое спасибо!
Просмотрел логи TMG и обнаружил, что SIP и RTP пакеты приходят с разных ip источников.
Отключил в обоих TMG SIP фильтр и заработало!