CallManager 3.1 upgrade caveat affecting only large WAN deployments
CallManager 3.1 software upgrade posting to CCO was originally scheduled for CCO posting Friday, 27 July. Emergent concerns about technical issues relating to call admission control dictated a delay in the posting. The issue is related to the inability of locations-based call admissions control to properly account for music-on-hold, multi-party conference and transcoding sessions across a wide area network among phones and gateways at remote sites in a centralized call processing topology. It therefore affects only those deployments with centralized call processing and multiple remote sites. A short-term solution has been included in the CallManager 3.1 upgrade now posted on Cisco.com software center since August 2nd. CD and Media Convergence Server (MCS) release will follow within the month of August.
This short term fix will limit remote site users in a centralized call processing topology to tone-on-hold. Central site users (stations and off-net callers through gateways) will continue to have MOH
service. Longer term, a CallManager 3.1 maintenance release is expected by October 2001 that provides a solution that delivers music-on-hold to remote site users.
Please consult release notes and design guides before installation or upgrade to best understand design, configuration and operational caveats.
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