Cisco WebEx Hybrid Solutions

By connecting existing network resources and on-premises unified communications services to the Cisco WebEx cloud. More collaboration capabilities will be provided, along with consistent, unified user and administrator experiences

These days almost organizations are choosing collaboration services from the cloud but many are unable to move all their services to the cloud. WebEx Hybrid Services bring cloud and premises based services together as one solution to deliver the best calling ,meeting and messaging .

There are different scenarios for hybrid calling between WebEx Cloud and CUCM on premise

1.0 Hybrid Calling for WebEx Devices (Device Connector)

Hybrid Calling for WebEx Devices provides hybrid call functionality for devices that are added to Workspaces in Control Hub. WebEx devices are registered to the cloud, and when they are enabled with Hybrid Calling, they also connect to onpremises Unified Communication Solution.

WebEx devices in the Workspace become a part of your existing on-premises dial plan, allowing these devices to call user extensions or the PSTN, and receive incoming calls Like devices registered directly to the on premise Cisco Unified Communication Solution (CUCM).

WebEx App can also have a calling capability while WebEx APP connected to a cloud-registered WebEx device that is enabled for Hybrid Calling. At this case, Users dial directly from WebEx App and have the call take place on the WebEx device.

On-premises and cloud Requirements for Hybrid Calling for WebEx Devices.

Before configuring devices for the service, ensure to meet all the prerequisites

WebEx Devices

These devices can get on-premises and PSTN calling functionality from the Unified CM after they’re enabled for Hybrid Calling. You could check all supported devices through below link

Cisco Unified Communication on-premises Solution

Minimum supported version of Cisco Call Manager Cluster is v 11.5 SU3 and Later
The Unified CM user account that represent the Workspace account must have a minimum Enhanced UCL
Cisco Expressway Core and Edge is required for Hybrid Calling, version X8.11.4 or later required (Hybrid Calling calls are classified the same as Mobile Remote Access (MRA) calls and doesn’t consume licenses on Expressway)

WebEx Device Connector

To configure Hybrid Calling for WebEx Devices, the WebEx Device Connector Software has to be installed on Machine has network access to the Unified CM that contains configuration that you want to synchronize to WebEx cloud-registered devices in Workspaces.

The WebEx Device Connector is a lightweight piece of software that could be installed on supported Windows or MAC operating systems:

Active Hybrid calling services for organization

Hybrid Calling is a service hosted by WebEx Control Hub, Administrator of WebEx Control Hub can enable this service then add this service to WebEx cloud-registered devices.

Network requirements

Open required ports for

2.0 Hybrid Calling for Webex App (Unified CM)

This Hybrid Scenario known as Migration from Jabber to WebEx App, WebEx App can be registered directly to Cisco Unified Communications Manager call control environment (on-premises enterprise). WebEx App Users will gain all on Premises experiences like Cisco Jabber, allowing them to directly make calls in WebEx App through your Unified CM environment without linking WebEx App with Devices registered on Cloud.

Cisco Unified CM and Mobile and Remote Access (MRA) solution will be used by WebEx App for registration to calling Services on Cisco Call Manager on premise similar to Jabber.

WebEx App makes its primary connection to the WebEx cloud to get its service configuration (messaging, meetings, presence, contact lists, calling behavior, and so on), but it registered directly with on premise Cisco Call manager for calling services like Jabber.

On-premises and cloud Requirements for Hybrid Calling for WebEx App.

Cisco Unified Communication on-premises Solution

Licenses

Cisco WebEx organization (managed in Control Hub) with a paid subscription.
User accounts must be managed in organization but they don't require a specific license assignment to use Calling in WebEx App (Unified CM).
For softphone functionality, each WebEx App registers to Unified CM as a softphone client like Cisco Jabber and counts as a device toward Unified CM licensing.

Recommended configuration but not mandatory

(Single sign-on) SSO is supported with Unified CM and Expressway. For a consistent user experience with SSO, it is recommended to extend Identity Provider (IdP) integration to WebEx App so that users can sign in with the same credentials
It is recommended to sync users from Active Directory into Control Hub through Cisco Directory Connector also synchronize user phone numbers to have same users accounts on Cisco Call Manager and Control Hub.

3.0 Hybrid Calling Through Integration between WebEx Calling and Cisco CUCM

To allow direct dialing between phones registered to Unified CM and phones in WebEx Calling locations, the integration through SIP trunk between Cisco Call manager (on-premises calling solution) and WebEx Calling (cloud calling solution) will be required.

Also this integration is required in case of transition FROM Unified CM (on-premises calling solution) TO WebEx Calling (cloud calling solution)

Local Gateway

The local gateway is an edge device for Public Switch Telephony Network (PSTN) interworking and on premises Unified CM interworking with WebEx Calling. The local gateway can be deployed standalone or in deployments where integration into Cisco Unified Communications Manager is required.

The trunk between the local gateway and WebEx Calling is always secured using SIP TLS transport and SRTP for media between Local Gateway and the WebEx Calling Access SBC.

Hardware and Software Requirements for Local Gateway

Make sure the platform is running a supported IOS-XE release as per the

License for Local Gateways

CUBE calling licenses must be installed on the local gateway

Configuring Local Gateway on WebEx Calling

There are two options to configure the Local Gateway for your WebEx Calling trunk

WebEx Calling requires secure signaling and media. The local gateway performs the encryption, and a TLS connection must be established outbound to the cloud

Configuring Local Gateway on Cisco Unified CM

Integration between Cisco Call Manager and CUBE has to be SIP based , this integration could be secured or non

Call Routing Considerations

Calls from WebEx Calling to Unified CM

The WebEx Calling routing logic works like this: if the number that is dialed on a WebEx Calling endpoint cannot be routed to any other destination within the same customer in WebEx Calling, then the call is sent to the local gateway.

Calls From Unified CM to WebEx Calling

To enable call routing from Unified CM to WebEx Calling on Unified CM a set of routes need to be provisioned to define the set of +E.164 and enterprise numbering plan addresses in WebEx Calling