I found the culprit tech-prefix must be set on the PSTN router
interface FastEthernet0/1 description To Cloud_Switch00 f0/5 ip address 192.168.1.11 255.255.255.0 duplex full speed 100 h323-gateway voip interface h323-gateway voip id PSTN-WAN ipaddr 192.168.1.11 1719 h323-gateway voip h323-id pstn-gw h323-gateway voip tech-prefix 2# h323-gateway voip bind srcaddr 192.168.1.11 gatekeeper zone local PSTN-WAN nuggetlabs.com 192.168.1.11 zone remote HQ-RTR nuggetlabs.com 10.10.200.3 1719 zone remote US nuggetlabs.com 10.10.110.1 1719 zone prefix PSTN-WAN 34* zone prefix PSTN-WAN 91* gw-type-prefix 2#* default-technology no shutdown
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