Добрый день. Схема следующая : DVG5004--> софтсвич Mera MVTS.---->(Ethernet) Tenor (E1)---->АТС. Проблема в том, что вызовы с DVG проходят нестабильно - ~60% успешно, остальные не успешно. Тестировали на версиях 1.02.38.65 и 1.02.38.93. Логи ниже.
не успешный вызов:

13:31:43 *** SLMON start to log ***
13:31:53 [000487] Receive Cmd=1100, ParaLen=5, Para=[Login]
13:31:53 [000487] Login == Ver(1.02.38.93.6674 2013/01/09 16:43:16) PId(360.DLink.MultiServer.NoPrefix.TR069.drtp) Drv(1.3.3.180) Hw(SP5220S) ==
13:31:53 [000487] gw_msg: send cmd[9]
13:31:55 [000510] 0: DTMF Timeout #1
13:31:55 [000510] 0: End Input Default Route [0]
13:31:55 [000510] 0: Line DialNum_New [532290]
13:31:55 [000510] 0: Call Proxy with [532290]
13:31:55 [000510] 0: ==7:Inviting
13:31:55 [000510] 0: VoIP CallOut, Invite <sip:532290@81.22.0.10;user=phone>
13:31:55 [000511] 4: 532246=DIALING
13:31:59 [000551] 0: Invite timeout ===
13:31:59 [000551] 0: Inviting Timeout ========
13:31:59 [000551] 0: Rtp Talk Stop !
13:31:59 [000552] 0: StopPlayTone()=0
13:32:00 [000552] 0: ==15:PlayBusyTone
13:32:00 [000552] 0: Playing Busy Tone
13:32:04 [000601] 0: StopPlayTone()=0
13:32:04 [000601] 0: Fxs Hangup
13:32:04 [000601] 0: StopPlayTone()=0
13:32:04 [000601] 0: ==3:Idle
13:32:04 [000601] 0: SetFax(1)=0

успешно:
13:35:18 [002538] 0: Fxs Pickup
13:35:18 [002538] 0: StopDeviceVoiceTone
13:35:18 [002538] 0: ==4:GetDtmf
13:35:21 [002573] 0: StopPlayTone()=0
13:35:27 [002630] 0: DTMF Timeout #1
13:35:27 [002630] 0: End Input Default Route [0]
13:35:27 [002630] 0: Line DialNum_New [532290]
13:35:27 [002630] 0: Call Proxy with [532290]
13:35:27 [002630] 0: ==7:Inviting
13:35:27 [002630] 0: VoIP CallOut, Invite <sip:532290@81.22.0.10;user=phone>
13:35:27 [002631] 4: 532246=DIALING
13:35:28 [002641] 4: 532246=PROCEEDING
13:35:33 [002685] 4: 532246=RINGBACK
13:35:33 [002685] 4: Session_Progress
13:35:33 [002685] 0: Peer=81.22.0.10#28448, PT=8, RecvOnly=0
13:35:33 [002685] 0: StopDeviceVoiceTone
13:35:33 [002685] 0: to set 2833 pt, send=101, recv=101
13:35:33 [002685] 0: SetVoiceCoder(0)=0
13:35:33 [002685] 0: localip = 192.168.32.66 !!
13:35:33 [002685] 0: RTP[1,1], Peer=81.22.0.10#28448, PT=8/2/1, local=192.168.32.66#0
13:35:33 [002685] 0: SetTalkMode[1,1]
13:35:33 [002685] 0: ==14:Talking
13:35:33 [002685] 4: 532246=CONNECTED
13:35:33 [002685] 0: St_Talking/Substatus=0
13:35:33 [002685] 0: Peer=81.22.0.10#28448, PT=8, RecvOnly=0
13:35:33 [002685] 0: IsRTPChanged ? type=1
13:35:33 [002685] 0: RTP Not Changed
13:35:43 [002792] 0: Get(1)
13:35:44 [002794] 0: Get(1)
13:35:44 [002799] 0: Get(0)
13:35:44 [002803] 0: Get(4)
13:36:00 [002963] 0: StopPlayTone()=0
13:36:00 [002963] 0: Fxs Hangup
13:36:00 [002963] 0: Rtp Talk Stop !
13:36:00 [002963] 0: RTP S=1433 R=1124 Lost=0
13:36:00 [002963] 0: Bye at Talking
13:36:00 [002963] 0: ==3:Idle
13:36:00 [002963] 0: SetFax(1)=0
13:36:00 [002963] 4: 532246=DISCONNECT
13:36:01 [002963] 4: Release Old Dlg #1

На сети используются и другие голосовые шлюзы - Длинк, Натекс, с которыми проблем не наблюдается.

У Вас где-то теряется ответ на invite. Опишите схему сети

DVG5004-->КоммутаторDES3028---> софтсвич Mera MVTS.---->(Ethernet) Tenor (E1)---->АТС.