Understanding H.323 ALG Endpoint Registration Timeouts

In Network Address Translation (NAT) mode, when endpoints in the protected network behind the Juniper Networks device register with the H.323 gatekeeper, the device adds an entry to the NAT table containing a mapping of the public-to-private address for each endpoint. These entries make it possible for endpoints in the protected network to receive incoming calls.

You set an endpoint registration timeout to specify how long an endpoint registration entry remains in the NAT table. To ensure uninterrupted incoming call service, set the endpoint registration timeout to a value equal to or greater than the keepalive value the administrator configures on the gatekeeper. The range is 10 to 50,000 seconds, the default value is 3600 seconds.

Related Topics

• JUNOS Software Feature Support Reference for SRX Series and J Series Devices
• Understanding H.323 ALGs
• H.323 ALG Configuration Overview
• Example: Setting H.323 ALG Endpoint Registration Timeouts