The Presence status of my endpoints sometimes seems to take a while to update in VCS. How can I fix this?

Introduction

This article relates to Cisco TelePresence Video Communication Server Expressway.

Q. The Presence status of my endpoints sometimes seems to take a while to update in VCS. How can I fix this?

A. When the VCS is sent a registration, de-registration, in-call or call-ended message by the endpoint, the VCS's Presence User Agent (PUA) will update the endpoint's presence status immediately.

However, there are two situations when changes will not be updated immediately:

• If the endpoint goes offline without first reporting a status change to the VCS (e.g. if it is powered down or unplugged), the PUA will only change the endpoint's status to off-line when it fails to receive the next registration refresh from the endpoint.

• If the PUA is enabled after the endpoint has already registered, it will only report the endpoint as on-line when it receives the next registration refresh from the endpoint.

The frequency of registration refreshes is configured by the VCS as follows:

• For SIP endpoints, by the Registration expire delta setting (VCS configuration > Protocols > SIP > Configuration). The default is 60 seconds.

• For H.323 endpoints, by the Time to live setting (VCS configuration > Protocols > H.323). The default is 30 minutes.

You can change either or both of these settings to reduce the time taken for the PUA to update the endpoint's status.

Related Information

• Technical Support & Documentation - Cisco Systems