Hybrid Line Registration

VVX phones support the hybrid line registration feature that enables you to register a Skype for Business server on one line and an OpenSIP server on other lines.

Make sure to register Skype for Business server on line 1 and other lines with any Open SIP server. Using reg.limit parameter you can configure the hybrid line registration feature.
Note: When enabling hybrid line registration feature, set the value for call.stickyAutoLineSeize and call.enableOnNotRegistered parameter to 1.

In addition, you can choose the number of lines to configure by setting the appropriate value in the parameter. You can configure and register a maximum of three different servers using this parameter.

Note: Polycom VVX 101 business media phones and VVX 150 business IP phones do not support Hybrid Line Registration.

Skype for Business features behave the same way if the phone is hybrid mode enabled or not. However, when you enable the up.oneTouchVoicemail parameter, you can call voicemail services directly from the phone. Otherwise, the phone displays a summary page with message counts.

Hybrid Line Registration does not support Hot Desking and advanced OpenSIP features such as Shared Line Appearance, Busy Lamp field, and Automatic Call Distribution.
Note: When VVX phones are hybrid mode enabled, the H.323 protocol is not supported.
You can view the hybrid registration status along with the registered line specific information in the Web Configuration Utility. When you enable the hybrid line registration feature on your VVX phone, existing feature behaviors change to the following:
  • Do Not Disturb

    The Do Not Disturb (DND) feature now provides an All option. When the user selects this option, DND is enabled on all registered lines. If only one line is registered to the server, users can set DND directly by navigating to Settings > Features > DND. The server-based DND behaves the same way in hybrid registration mode.

  • Recent Calls

    Users can view all the registered line’s information and call logs for the corresponding registered line under the Recent Calls menu. However, when a Skype for Business user signs out of the phone, the server-based call logs and the registered line’s information for the Skype for Business server are not available.

  • Call Forwarding

    Users can enable call forwarding on a per-registered line in a hybrid registration mode that allows them to forward an incoming call to a contact, voicemail, or delegates. The server-based call forwarding feature behaves the same way in hybrid registration mode.

  • Dial Plan

    You can configure dial plans that enable the phone to select the line automatically for an outgoing call. Every line must have a unique dial plan. When a dial plan is not configured for a line, the value defined in the global parameter for a dial plan takes priority.

    Additionally, you can configure the line switching feature based on the dial plan when the phone is on-hook. The line switching feature enables the dialed number to switch to the corresponding line. For example, when you place a call from the phone and the number corresponds to an Open SIP line, the line switching feature enables the dialed number to switch to the corresponding line. Using the reg.1.mergeServerDigitMapLocally parameter, you can merge the dial plans received from the server with the dial plans configured for line 1 on your provisioning server. When a user dials a number directly from the call list or directory list, the value set in the corresponding parameter decides whether the dial plan must be parsed or not.

    You can also configure the dial plan for SIP URL dialing. For SIP URL dialing, the value defined in the per-registration dial plan parameter takes priority over the general dial plan parameter.

  • Conference Calls

    Hybrid registration mode enables users to make Skype for Business and OpenSIP conference calls in parallel. Users can switch between OpenSIP and Skype for Business conference calls. However, you can’t make conference calls between phones registered to Skype for Business and OpenSIP servers.

  • Securing Phone Calls with SRTP

    When hybrid line registration is enabled, the Secure Real-Time Transport Protocol (SRTP) parameters for enable, require, and offer supports on per-line basis.

  • Enhanced 911

    In hybrid registration mode, the Enhanced 911 service is supported only on the line registered with the Skype for Business server.

  • Presence Status

    When hybrid line registration is enabled, users can set the presence status for the line registered to the Skype for Business server only. Users can view the device presence only on the line registered to the Skype for Business server.

  • Contact Directory

    Users can access contact directories of all the registered lines. When user selects a contact from any directory and presses Dial, the call generates automatically based on the dial plan for the corresponding line without the need for the user to select the line. However, the home menu icon and presence status aren’t available for the BroadSoft UC-One directory. You must set the homeScreen.UCOne.enable parameter value to 0.

  • Call Park

    In hybrid registration mode, users can only park and unpark an active call to the corresponding registered line. For example, when an active call exists on a Skype for Business line and a user chooses to park the call, the call park applies only on the Skype for Business line.

  • Music on Hold

    When a user places a call on hold using the registered line, the user hears only the call hold tone for the corresponding line. For example, when a Skype for Business call is put on hold, the user hears the Skype for Business hold tone.

  • Flexible Line Key

    When the phone is in hybrid registration mode and the Flexible Line Key (FLK) feature is enabled, you can assign FLK to lines that are not hybrid line registered. However, when hybrid registration is enabled after FLK assignment, the feature replaces lines 2 and 3 configured with FLKs with hybrid registered lines.