The GnuGk project has been assigned following codes to be used
to identify proprietary extensions in H.323 protocol messages:

OIDs:
1.3.6.1.4.1.27938

T.35:
138.2

Currently, the project uses following identifiers:

(T.35) 255.4242.255 - for identifying RAS messages forwarded to alternate GKs
(T.35) 138.2.1 - for sending neighbor ID inside LRQ/LCF nonStandardData field
(T.35) 138.2.2 - for NAT detection based on nonStandardData field inside RRQ/RCF