List the two primary functions of a gatekeeper in an H.323 network.
Gatekeepers provide call routing with a centralized dial plan and CAC.
What is a gatekeeper zone?
A gatekeeper zone is used to logically group H.323 devices that an individual gatekeeper controls.
What is a technology prefix?
A technology prefix is an optional H.323 feature that the gatekeeper uses to group gateways by type or class or to define a pool of gateways.
Where is bandwidth management initially done?
Bandwidth management is initially done when processing an ARQ. You can modify it later during the call with a BRQ.
What is another name for a directory gatekeeper?
Another name for a directory gatekeeper is a hierarchical gatekeeper.
What is GUP, and what is it used for?
GUP is the Gatekeeper Update Protocol. It uses RAS messages to provide updates to alternate gatekeepers when using gatekeeper clustering.
Part I: Voice Gateways and Gatekeepers
Gateways and Gatekeepers
Part II: Gateways
Media Gateway Control Protocol
Session Initiation Protocol
Connecting to the PSTN
Connecting to PBXs
Connecting to an IP WAN
Influencing Path Selection
Configuring Class of Restrictions
SRST and MGCP Gateway Fallback
Using Tcl Scripts and VoiceXML
Part III: Gatekeepers
Part IV: IP-to-IP Gateways
Cisco Multiservice IP-to-IP Gateway
Appendix A. Answers to Chapter-Ending Review Questions