VoIP newbie request for help. Only incoming calls available. Outgoing: timeout, no connection.

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Please, point my faults. I don't understand many things.

My situation is following:

VoIP provider (x.x.x.x) --- GNUGK (pu.bl.ic.ip, pr.iv.at.eip) --- VoIP 
Gateway (y.y.y.y) --- Phone

When I call from left to right - everything OK. Otherwise - NO.
As a result I get this:
"Error (1) : Input/Output error (12:57)
Error 10/4: Interrupted system call"
or this:
"connection timeout".

I compared parameters both of calls and writeout ones which I found 
interested and unexplainable for me:
INCOMING:
IE: Bearer-Capability: 80 90 a3
Q931s Call 1 is NAT type 2

OUTGOING:
IE: Bearer-Capability: 80 91 a3
Q931s Call 2 is NAT type 5




Here is gnugk.ini:

Fortytwo=42
Home=pu.bl.ic.ip,pr.iv.at.eip
TimeToLive=600
StatusTraceLevel=5
UseBroadcastListener=0
UseMulticastListener=0
UnicastRasPort=1719
MulticastPort=1718
MulticastGroup=224.0.1.41
EndpointSignalPort=1720
ListenQueueLength=1024
TimestampFormat=Cisco
SignalReadTimeout=1000

[RoutedMode]
GKRouted=1
H245Routed=1
CallSignalPort=1720
CallSignalHandlerNumber=10
RemoveH245AddressOnTunneling=1
AcceptNeighborsCalls=1
AcceptUnregisteredCalls=1
SupportNATedEndpoints=1
DropCallsByReleaseComplete=1
RemoveCallOnDRQ=1
SendReleaseCompleteOnDRQ=1
Q931PortRange=20000-20999
H245PortRange=30000-30999
SetupTimeout=4000
SignalTimeout=10000
AlertingTimeout=60000
TcpKeepAlive=0
SocketCleanupTimeout=5000

[Proxy]
Enable=1
InternalNetwork=y.y.y.y/255.255.255.0
T120PortRange=40000-40999
RTPPortRange=50000-59999
ProxyForNAT=1
ProxyForSameNAT=1
EnableRTPMute=0
DisableH235Call=1
DisableH460Call=1

[EP::GK4]
Capacity=60
GatewayPriority=1
GatewayPrefixes=*,!9392
Proxy=1

[RasSrv::GWPrefixes]
GK4=*,!9392

[RasSrv::RRQFeatures]
OverwriteEPOnSameAddress=0
AcceptEndpointIdentifier=1
AcceptGatewayPrefixes=1
IRQPollCount=1

[RasSrv::ARQFeatures]
ArjReasonRouteCallToSCN=1
ArjReasonRouteCallToGatekeeper=1
CallUnregisteredEndpoints=1
RemoveTrailingChar=#

[RasSrv::LRQFeatures]
NeighborTimeout=20
ForwardHopCount=10
AcceptForwardedLRQ=1
ForwardResponse=1

[RoutingPolicy]
default=internal,explicit,neighbor,parent

[RoutingPolicy::OnARQ]
default=internal,explicit

[RoutingPolicy::OnLRQ]
0=internal
default=neighbor

[RoutingPolicy::OnSetup]
dialedDigits=internal,neighbor
default=internal,neighbor,explicit,parent

[RoutingPolicy::OnFacility]
default=internal

[RasSrv::Neighbors]
GK4=x.x.x.x:1720;*

[Neighbor::GK4]
Host=x.x.x.x
SendPrefixes=dialedDigits
AcceptPrefixes=dialedDigits
AcceptForwardedLRQ=1
ForwardLRQ=never

[RasSrv::PermanentEndpoints]
; For gateway
x.x.x.x:1720=GK4;*,!9392
; For terminal
y.y.y.y=939291,939292

[Gatekeeper::Auth]
default=allow

[NATedEndpoints]
939291=y.y.y.y
939292=y.y.y.y

;EOF







VoIP Gateway: Dynamix 2 FXS. GKRouted Mode. Gateway type: Terminal (I change 
them all). Fast Start and H.245 Tunneling is Enabled.

Phone: ordinary Panasonic and Siemens.

I don't know anything about hardware of VoIP provider, only IP and port.

I asked specialist of VoIP provider for resolving this situation. Answer 
was: wrong protocol using, bla-bla-bla, incorrect packets with DF flags and 
so on, rtfm at all.

Using Ethereal, I catched 2 packets from pu.bl.ic.ip to x.x.x.x:1720 with 3 
sec. interval while I made outgoing call and no any answer from x.x.x.x. 
Structure of packets is the same when I receive a call (DF-flags sets too).

I need to know.. Is it my fault or just denying any outgoing calls with my 
VoIP provider? Or just they don't want to search mistakes made by 
themselves.

Please help me! Any comments are welcome. Thanks a lot in advance.

Regards,
Kutkovsky Dmitry

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