Hi, after struggeling many hours with cisco callmanager 4.0, ohphone and gnugk I want to share my experience, because I only found small documentation on the net. I can now phone call from a Debian/GNU Linux ohphone to other phone numbers registered at the callmanager. These numbers direct to other softphones or to the international area via a cisco gateway. In the gatekeeper.ini I had to switch off GKRouted and set the prefix routes: ... [RoutedMode] GKRouted=0 H245Routed=1 CallSignalPort=1720 CallSignalHandlerNumber=1 RemoveH245AddressOnTunneling=1 AcceptNeighborsCalls=1 AcceptUnregisteredCalls=1 SupportNATedEndpoints=1 DropCallsByReleaseComplete=1 ... [RasSrv::GWPrefixes] mytrunk=17,0 ... [RasSrv::PermanentEndpoints] # For gateway (callmanager IP) XXX.XXX.XXX.XXX=mytrunk;17,0 On the callmanager I had to add a "trunk" with a unique device name (not an IP), which appears as an alias in the gnugk when callmanager registers at the GK. The callmanager needs a gatekeeper (gnugk) and uses it with the terminal type "gateway". The ohphone has to be added as H.323 phone device, with signaling port 1720 and your specific "call search space". Depending of the prefix, the calls are routed to local phones or outgoing via a cisco gateway router. - Oliver > > it seems - independent of what I do with my gatekeeper.ini - I always get " > H245 Write PDU fail: no control channel", when I try to use the cisco > callmanager as gateway. What does that mean? :-( ------------------------------------------------------- This SF.Net email is sponsored by: IBM Linux Tutorials Free Linux tutorial presented by Daniel Robbins, President and CEO of GenToo technologies. Learn everything from fundamentals to system administration.http://ads.osdn.com/?ad_id=1470&alloc_id=3638&op=click _______________________________________________ List: Openh323gk-users@xxxxxxxxxxxxxxxxxxxxx Archive: http://sourceforge.net/mailarchive/forum.php?forum_id=8549 Homepage: http://www.gnugk.org/