Web Controls and Dialing Procedures

This section describes the Conference Room Connector controls that are available in the Zoom web portal and multiple dialing options for supported H.323/SIP video conferencing devices to connect to the CRC gateway and join Zoom Meetings. Dialing options include manual dialing to the CRC gateway via SIP domains or IP addresses, advanced dial strings, pairing codes, and calling out to H.323/SIP devices from the Zoom desktop client or mobile application.

Settings Are in the H.323/SIP Room Connector Section of the Web Portal

Zoom account owners, administrators, or users with Conference Room Connector (CRC) permissions will be able to access the H.323/SIP Room Connector section of the Admin menu located in the Zoom web portal when CRC functionality is activated by purchasing one or more CRC subscriptions.

The H.323/SIP Room Connector section is shown below. You will see several tabs across the top of the page leading to additional information and configuration options.

Descriptions of settings and information available in the H.323/SIP Room Connector section of the web portal

The following descriptions explain each tab in the H.323/SIP Room Connector section of the web portal and their relevant settings or functions for Conference Room Connector and Zoom-managed H.323/SIP video conferencing devices.

• Cloud Room Connector CRC gateway IP addresses (for H.323 protocol) and SIP domains (for SIP protocol) are listed here. These IP addresses and domains can be dialed by H.323/SIP devices to connect to the CRC gateway and join Zoom Meetings. See the H.323/SIP dialing instructions in this document for dialing options, and best practices for dialing to the CRC gateway.

• Connections Live calls between H.323/SIP video conferencing devices and Zoom Meetings that utilize your CRC licenses will be listed here.

• Configuration This section includes pre-configuration settings for H.323/SIP video conferencing devices; enabling account owners and admins to configure the default video layout and input DTMF tones when devices join a Zoom Meeting via the CRC gateway. Users can subsequently change the video layout or input DTMF tones using the device keypad once they have joined a Zoom Meeting. See our Pre-configuring H.323/SIP support article for more information and instructions on CRC pre-configuration.

How Do H.323/SIP Devices Join Zoom Meetings

H.323/SIP video conferencing devices join Zoom Meeting by connecting to the CRC gateway using dial strings, pairing codes, and callout options.

An H.323/SIP video conferencing device must dial into the CRC gateway using one of Zoom’s provided SIP domains (for SIP protocol) or IP addresses (for H.323 protocol). The desired Zoom Meeting or Webinar ID must also be dialed as well as any additional information required by the host/scheduler of the Zoom Meeting. Dialing can be done with the basic manual dialing instructions shown below as well as with more advanced dial strings, pairing codes, and callout methods described in this section.

H.323/SIP video conferencing devices will reach the CRC gateway splash screen when dialing one of the IP addresses or SIP domains provided in the web portal

In the web portal—account owners, admins, and users with CRC permissions can access the H.323/SIP Room Connector section and reference the available list of IP addresses and SIP domains for CRC dialing.

Using the available controls on your H.323/SIP video conferencing device, dial an IP address (for H.323 protocol) or SIP domain that is near the geographic location of your video conferencing device to help reduce network latency.

Once connected, the CRC gateway splash screen will appear.

Enter the Meeting ID for the Zoom Meeting you wish to join using the video conferencing device controls. Then select # to join the meeting.

Dial strings can be used to join H.323/SIP video conferencing devices directly to Zoom Meetings and configure certain in-meeting audio and video settings

Meeting IDs and other Zoom Meeting information can be entered into the dial string from your H.323/SIP video conferencing device to bypass the CRC gateway splash screen and enable certain audio and video settings for the device. See our H.323/SIP Room Connector Dial Strings support article for more information.

Pairing codes are entered in the Zoom client controls or web portal to join H.323/SIP video conferencing devices to Zoom Meetings

A pairing code is provided at the bottom of the CRC gateway splash screen after your H.323/SIP video conferencing device has dialed into the CRC gateway. This code can be entered on the Zoom website, web portal, or through administrative controls to connect your H.323/SIP device to an active Zoom Meeting. See our Joining via pairing with an H.323/SIP device support article for instructions.

Zoom users can invite H.323/SIP video conferencing devices to meetings or call them directly from the Zoom desktop client or mobile application

See our Inviting an H.323/SIP room system to a meeting support articles for the prerequisites and instructions for inviting an H.323/SIP device into a Zoom Meeting from the Zoom desktop client or mobile application. You can also enable the functionality to call H.323/SIP devices directly from a desktop client or mobile app, without an active Zoom Meeting.

Video conferencing devices connect to the CRC gateway using SIP or H.323 dialing protocols and firewalls must be properly configured to pass this call setup and media traffic

This diagram demonstrates the signal flow and port ranges utilized for call setup and media communication between a customer’s H.323/SIP video conferencing device and Zoom Conference Room Connector as described in our Network Firewall Settings for CRC support article.

Can My H.323/SIP Devices Connect to Third-Party SIP Destinations, and Microsoft Teams and Webex Meetings?

When registered to the Zoom SIP proxy, Cisco and Polycom SIP video conferencing devices can join third-party meetings that are accessible via SIP, including Microsoft Teams meetings with Microsoft Cloud Video Interop SIP dial-in information, Webex meetings, or other third-party meeting services that offer SIP connectivity.

If the third-party host’s meeting invitation includes a SIP address for interop dialing, Cisco and Polycom SIP video conferencing devices that are registered to the Zoom SIP proxy will be able to out-dial to the third-party SIP URI.

If you have set up calendar integration for your Cisco/Polycom rooms, Zoom Calendar may be configured to parse meeting invitations for:

• Generic third-party SIP URIs

• Microsoft Teams meetings with CVI SIP dial-in information

• Webex meetings

Third-party call signaling for Cisco and Polycom SIP devices that are registered to Zoom’s cloud SIP proxy will set up calls through CRC and then establish direct media connections

The following diagram demonstrates call flow for Cisco and Polycom devices that are registered to Zoom’s cloud SIP proxy and are connecting to third party meetings via SIP invitations. SIP video conferencing devices that are not registered to Zoom’s SIP proxy will set up calls directly with the third-party service via SIP protocol.

Call control will be initiated between your organization’s video conferencing device via SIP protocol over TCP port 5061 and Zoom’s cloud SIP proxy. Call control signaling is then relayed to the SIP destination via SIP port 5061. TCP or UDP media ports will then be established from the video conferencing device directly to the third-party meeting service (not relayed through the Zoom cloud SIP proxy). Media port numbers will vary with each third-party meeting service provider