H.323 Signaling Scenarios; Endpoint-To-Gatekeeper Registration - Cisco ATA186-I2 Administrator's Manual

H.323 Signaling Scenarios

H.323 Signaling Scenarios
This section describes call flows for the following scenarios:
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•
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Each of the call flows includes a call diagram, action descriptions table, and a sample log file.
H.323 Endpoint-to-Gatekeeper Registration
Figure D-1
registration with no authentication.
Figure D-1
Endpoint
Table D-1 Action Descriptions
Step Action
Gatekeeper Request (GRQ)—Cisco ATA to
1.
H.323 gatekeeper
Gatekeeper Confirmation (GCF) or
2.
gatekeeper Rejection (GRJ)—H.323
gatekeeper to Cisco ATA
3. Registration Request (RRQ)—Cisco ATA
to H.323 gatekeeper
Registration Confirmation (RCF) or
4.
Registration Rejection (RRJ)—H.323
gatekeeper to Cisco ATA
Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator's Guide for H.323 (version 3.0)
D-2
H.323 Endpoint-to-Gatekeeper Registration, page D-2
H.323 Endpoint-to-Endpoint Call Setup with a Common Gatekeeper, page D-5
H.323 Call Setup from H.323 Network to Circuit Switched Network, page D-14
illustrates the Cisco ATA registering with an H.323 gatekeeper. This scenario features
Cisco ATA-to-H.323 Gatekeeper Registration
GRQ
GCF/GRJ
RRQ
RCF/RRJ
Description
Cisco ATA sends a GRQ message to the H.323 gatekeeper to see if
any gatekeepers are available for registration.
H.323 gatekeeper returns a GCF or GRJ message, indicating whether
or not the responding gatekeeper is able to register new Cisco ATA
devices.
Cisco ATA sends a RRQ message to the H.323 gatekeeper in an
attempt to register as part of that gatekeeper's zone.
H.323 gatekeeper returns a RCF or RRJ message, indicating whether
or not the gatekeeper will add the Cisco ATA to its zone.
Appendix D H.323 Signaling
Gatekeeper
OL-4804-01