SIP working group’s deliverables

SIP specification
callcontrol: call control specifications, which enables multiparty services, e.g., transfer and bridged sessions
callerpref: caller preferences extensions, enables intelligent call routing services
mib: a MIB for SIP nodes
precon: extensions needed to assure satisfaction of external preconditions, e.g., QoS establishment
state: extensions needed to manage state within signaling, aka SIP "cookies"
priv: extensions for security and privacy
security: security and privacy mechanisms and requirements
provrel: extensions needed for reliability of provisional messages
servfeat: extensions needed for negotiation of server features
sesstimer: Session Timer extension
events: Events extensions (Subscribe/Notify)
natfriend: Extensions for making SIP a NAT-friendly protocol

[slide114] Now there are bunches of different working groups, and