Purpose: Patching and preventative maintenance on multiple systems. Systems Affected:
Cisco: -Webex - APAC Webex Connectivity Optimization ***Possible Impact: Cisco Webex services may experience a brief interruption while improvements are made to strengthen connectivity and increase service resiliency between Cisco and CallTower. -Cisco Jabber / MRA Phones - Security Update Expressway Clusters for CUCM ***Possible Impact: CallTower will be upgrading the Edge servers for Jabber and MRA Edge Phone Device. Users will experience a connectivity loss with their Jabber Client/Services and/or MRA Edge connection Phones.
Voice: - Hong Kong Masergy Circuit Migration ***Possible Impact: Legacy OneStream voice services hosted in Hong Kong may experience a temporary interruption. Active calls may be disconnected, and new call setup may be unavailable while connectivity services are relocated within the datacenter. Failover and redundant service configurations will minimize downtime. Service will be restored upon completion of the maintenance activities. - London Infrastructure Maintenance ***Possible Impact: During this maintenance window, services hosted in the Telehouse London datacenter may experience a brief interruption as network infrastructure is upgraded. Any service impact is expected to be limited to the duration of the maintenance activity, and services will be restored immediately upon completion.
Posted Sep 11, 2026 - 09:31 MDT
This scheduled maintenance affects: Microsoft (Microsoft 365, Microsoft Teams - Direct Routing, Microsoft Operator Connect), Cisco Unified Communications (Cisco Voice, Cisco Jabber, Cisco Webex Calling), CT Cloud (CT Cloud Voice), Contact Center (Cisco Webex Contact Center), and Global SIP Trunk, Hosted Cloud Based PBX.