1. debug ras on gateway:- Check if the RRQ being sent out to the gatekeeper
and are you getting back a RRJ message or you do get
nothing back.
2.debug ras on gatekeeper:- are you receiving the RRQ from the gateway and
is the gatekeeper sending back RRJ or RCF.
3. For more detailed reason why it wont register, turn
on debug h225 asn1 and look at the RejectionReason.
4. upgrade to the latest h323 software on the gateway.
5. if the gatekeeper see's no RRQ, the n check you config or
look at the output interface for hardware related issue e.g
queue wedge, drop , input errors.etc.