Introduction to Dedicated Instance

Publisher

Cisco Systems, Inc. (Webex Help Center)

URL

https://help.webex.com/en-us/article/dk3o5r/Introduction-to-Dedicated-Instance

Published

2026-09-10

Updated

unknown

Accessed

2026-09-16

HTTP status

200

License

Cisco proprietary documentation, all rights reserved; no-redistribution; short excerpts and locators only

Source notes citing this source

• In Webex Calling Dedicated Instance, Cisco Emergency Responder is offered for the Americas region only. in context
• Dedicated Instance customers are entitled to MRA for 100% of their Knowledge Worker count and to B2B calls for 5% of it. in context
• In Webex Calling Dedicated Instance, Expressway-C and Expressway-E are deployed during service activation for MRA and B2B calling. in context
• At activation, the Dedicated Instance operations team deploys MRA for 20% of the Knowledge Worker licenses. The customer can expand to the full 100% entitlement, based on consumption, by raising a Cisco Support case. in context
• An SME for a Dedicated Instance customer must go through a Cisco Business Unit approval process. in context
• In Webex Calling Dedicated Instance, a customer is eligible for an SME deployment when it has three clusters deployed in the Dedicated Instance cloud. in context
• In Dedicated Instance, a single SME cluster can span regions to serve a multi-region customer and route calls between regions. in context
• The on-premises Preferred Architecture threshold (four or more clusters) and the Dedicated Instance eligibility rule (three clusters) are different criteria for different offerings, not conflicting statements about one product. inferred in context
• The Dedicated Instance add-on includes Unified CM, Unity Connection and Expressway (for MRA and B2B), with IM and Presence optional and Session Management Edition optional for multi-cluster deployments. in context
• Cisco Emergency Responder is included in Dedicated Instance only in the Americas region. in context
• Dedicated Instance is orderable as an add-on for Webex Calling Flex Plan 3.0 through partners in specific countries. in context
• A fully deployed Dedicated Instance cluster supports up to 8 call processing servers, or approximately 50,000 devices. in context
• Dedicated Instance customers are entitled to MRA licences for 100% of their Knowledge Worker count and B2B calling for 5% of it. in context
• Cisco sizes the Dedicated Instance cluster: the number of Knowledge Workers and Common Area devices determines how many call processing nodes are deployed. in context
• Webex Calling Dedicated Instance is a dedicated cloud instance option of Webex Calling based on the Cisco Unified Communications Manager architecture. in context
• In Dedicated Instance, Unity Connection is deployed at service activation and sized on the Knowledge Worker count given per region in the First Time Setup Wizard; Office 365 integration requires contacting support because it affects sizing. in context
• Webex Calling Dedicated Instance includes Cisco Unified Communications Manager and Cisco Unity Connection as core applications. in context
• Webex Calling Dedicated Instance supports both Jabber and the Webex App, with the same user experience as on-premises Unified CM. in context
• In Dedicated Instance, Unity Connection is installed during service activation and sized by the Knowledge Worker count given for each region. in context
• The Webex Calling Dedicated Instance add-on includes Cisco Unity Connection, along with Unified CM, Expressway and optional IM and Presence, SME and (Americas only) Emergency Responder. in context
• Customers can distribute users across Dedicated Instance and Webex Calling, but calling features are not harmonised between the two platforms. in context
• Organisations that need to keep Unity Connection while moving to Webex cloud calling should look at Dedicated Instance, where Unity Connection serves Dedicated Instance users; it does not become voicemail for multi-tenant Webex Calling users. inferred in context
• The Dedicated Instance add-on bundles Cisco Unified Communications Manager, optional Cisco Unified IM and Presence, Cisco Unity Connection, Cisco Expressway, Cisco Emergency Responder in the Americas region only, and optionally Cisco Session Management Edition. in context
• Dedicated Instance is a single-tenant cloud calling option built on the Cisco Unified Communications Manager architecture and integrated with Webex Calling for centralised administration. in context
• Calling features are not harmonised between Dedicated Instance and Webex Calling multi-tenant; for example a multi-tenant Webex Calling user cannot be a member of a hunt group hosted on Dedicated Instance. in context
• Cisco positions Dedicated Instance as a low-disruption migration path from on-premises Unified CM, preserving the same features, user experience and integration options and requiring no retraining for existing Unified CM customers. in context
• A fully deployed Dedicated Instance cluster supports up to 8 call processing servers or approximately 50000 devices on Unified CM version 14 and above. in context
• On the evidence the corpus holds, the choice between Dedicated Instance and Webex Calling multi-tenant turns on whether an organisation wants to keep its existing Unified CM feature set and administration model or to re-platform onto Webex Calling's native feature set, and Cisco publishes no explicit decision tree and no named migration tool that distinguishes the 2 paths. inferred in context
• The Dedicated Instance add-on for Webex Calling includes 6 Cisco applications: Unified Communications Manager, Unified IM and Presence as an option, Unity Connection, Expressway, multiple cluster Emergency Responder in the Americas region only, and Session Management Edition as an option. in context
• Cisco takes a nightly backup of every Dedicated Instance UC application, keeps the latest 3 backups in the data centre password protected, uses them only to restore an application as part of disaster recovery, and states that the customer will not have access to these backups and that this is not a change backout strategy. in context
• The number of call processing nodes deployed in a Dedicated Instance cluster is determined by the Knowledge Worker and Common Area device counts captured in the First Time Setup Wizard during service activation, and Cisco states that the call processing service must not be activated on any node other than the specific nodes Cisco has activated in the cluster. in context
• A fully deployed Dedicated Instance Unified CM cluster supports up to 8 call processing servers or approximately 50000 devices with version 14 and above, a full-size cluster holds 50000 configured devices, and a maximum of 160000 end users may be configured or synchronised over LDAP into the cluster whether or not they are active on it. in context
• Cisco states that Dedicated Instance supports the same voice and video endpoints as the associated Unified Communications Manager release, that it also supports older Cisco endpoints and existing integrations, and that it can be trunked to third-party private branch exchanges. in context
• Dedicated Instance customers are entitled to Mobile and Remote Access licences for 100 percent of their Knowledge Worker count and to business-to-business calling for 5 percent, and the Dedicated Instance operations team deploys Mobile and Remote Access for 20 percent of the Knowledge Worker licence at activation, leaving the customer to expand to the entitled 100 percent based on consumption. in context
• Cisco states that the calling features are not harmonized between Dedicated Instance and Webex Calling, that customers who split users across the 2 platforms will experience different features, and gives as its own example that Webex Calling users cannot be part of a hunt group on Dedicated Instance. in context
• The first Unified CM cluster in a Dedicated Instance region is activated within 48 hours of service activation and any subsequent clusters within 5 business days. in context
• Dedicated Instance supports the same level of localisation as on-premises Unified Communications Manager, with phone and gateway tones in 82 countries, a self-care portal in 50 languages and clients in more than 30 languages, and is orderable as an add-on to the Webex Calling Flex Plan 3.0 through partners in specific countries. in context
• Cisco states that Dedicated Instance customers have access to the Unified Communications Manager security features for endpoints and UC applications including encrypted media, secure Survivable Remote Site Telephony and secure over-the-top registration using Mobile and Remote Access, and to Survivable Remote Site Telephony for site connectivity when network links go down together with Emergency Responder and Nomadic E911. in context
• A Dedicated Instance customer becomes eligible for a Cisco Session Management Edition deployment when they have 3 clusters deployed, a single Session Management Edition cluster can span regions, and an SME deployment requires a Business Unit approval process initiated by the account manager. in context
• Cisco Unity Connection is installed as part of Dedicated Instance service activation and sized from the Knowledge Worker count given per region, and Cisco requires a support case for an Office 365 integration requirement because that integration affects the sizing of the application. in context

Cite this source record

APA

WarmTransfer. (2026, September 10). Introduction to Dedicated Instance. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-help-dk3o5r-intro-dedicated-instance

BibTeX

@misc{warmtransfer-cisco-help-dk3o5r-intro-dedicated-instance,
  title  = {Introduction to Dedicated Instance},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-help-dk3o5r-intro-dedicated-instance},
  note   = {Cisco Systems, Inc. (Webex Help Center), accessed 2026-09-16}
}