1. Zoom Support
  2. Zoom Rooms and Workspaces Support
  3. SIP/H.323
  4. Joining Meetings from a SIP/H.323 Device

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SIP/H.323 Room Connector Dial Strings

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To avoid the Room Connector splash screen, you can enter the meeting details in the dial string on the SIP/H.323 device and join directly into the meeting.

Note: The meeting must be hosted by a Licensed user for an H.323 or SIP device to join. If the host's account does not have an available Room Connector license, but the attendees do, you can use the attendee's Room Connector license. 

This article covers:

H.323 dial string format

When dialing into a Zoom Meeting or Zoom Webinar using the H.323 protocol, you can dial into a specific regional data center by utilizing the IP address for the data center listed on the H.323/SIP Room Connector page of your account.

Full H.323 dial string format

[IP Address]##[Meeting ID]#[Passcode]#[Command]#[Host Key]

Enter a meeting in Gallery view (default)

Meetings without a passcode:

[IP Address]##[Meeting ID]
Example: 192.168.1.25##123456789

Meetings with a passcode:

[IP Address]##[Meeting ID]#[Passcode]
Example: 162.168.1.25##123456789#12345

Enter a meeting in full screen

Meetings without a passcode:

[IP Address]##[Meeting ID]##11
Example: 192.168.1.25##123456789##11

Meetings with a passcode:

[IP Address]##[Meeting ID]#[Passcode]#11
Example: 192.168.1.25##123456789#12345#11

Enter a meeting with a Host Key

Meetings without a passcode:

[IP Address]##[Meeting ID]###[Host Key]
Example: 192.168.1.25##123456789###123456

Meetings with a passcode:

[IP Address]##[Meeting ID]#[Passcode]#[Layout]##[Host Key]
Example: 192.168.1.25##123456789#12345#11##123456

Note: For some devices, please try [IP Address]##[Meeting ID]*[Passcode]*[Command]

Enter a meeting with dual video enabled

Meetings without a passcode:

[IP Address]##[Meeting ID]##308
Example: 192.168.1.25##123456789##308

Meetings with a passcode:

[IP Address]##[Meeting ID]#[Passcode]#308
Example: 192.168.1.25##123456789#12345#308

SIP dial string format

When dialing into a Zoom Meeting or Zoom Webinar using the SIP protocol, you can dial into a specific regional data center by utilizing the IP address or SIP Domain for the data center listed on the H.323/SIP Room Connector page of your account.

Full SIP dial string format

[Meeting ID].[Passcode].[Command].[Host Key].[Reserved].[Dial Code]@[IP Address]

or

[Meeting ID].[Passcode].[Command].[Host Key].[Reserved].[Dial Code]@zoomcrc.com

Enter a meeting in Gallery view (default)

Meetings without a passcode:

[Meeting ID]@[IP Address]
Example: 123456789@192.168.1.25

Meetings with a passcode:

[Meeting ID].[Passcode]@[IP Address]
Example: 123456789.12345@192.168.1.25

Enter a meeting in full screen

Meetings without a passcode:

[Meeting ID]..11@[IP Address]
Example: 123456789..11@192.168.1.25

Meetings with a passcode:

[Meeting ID].[Passcode].11@[IP Address]
Example: 123456789.12345.11@192.168.1.25

Enter a meeting with dual video enabled

Meetings without a passcode:

[Meeting ID]..308@[IP Address]
Example: 123456789..308@192.168.1.25

Meetings with a passcode:

[Meeting ID].[Passcode].308@[IP Address]
Example: 123456789.12345.308@192.168.1.25

Enter a meeting with Host Key

Meetings without a passcode:

[Meeting ID]...[Host Key]@[IP Address]
Example: 123456789...123456@192.168.1.25

Meetings with a passcode:

[Meeting ID].[Passcode]..[Host Key]@[IP Address]
Example: 123456789.12345..123456@192.168.1.25

Enter a meeting with Dial Code

Meetings without a passcode:

[Meeting ID].....[Dial Code]@[IP Address]
Example: 123456789.....1a2bc4d@192.168.1.25

Meetings with a passcode:

[Meeting ID].[Passcode]....[Dial Code]@[IP Address]
Example: 123456789.12345....1a2bc4d@192.168.1.25

Dial code features

If the Dial Code starts with 1, the following features will be enabled:

If the Dial Code starts with 2, the following features can be achieved:

  • Bypass the Waiting Room
  • Determines whether the device is a guest

Enter a meeting with a Reserved code

Meetings without a passcode:

[Meeting ID].....[Reserved]@[IP Address]
Example: 123456789....02.@192.168.1.25

123456789....03.@192.168.1.25

Meetings with a passcode:

[Meeting ID].[Passcode]....[Reserved]@[IP Address]
Example: 123456789.12345...02.@192.168.1.25

123456789.12345...03.@192.168.1.25

Note: When the value of reserved is 02 or 03, it means the dial string was pushed to the device by Enhanced Zoom Connector.

SIP/H.323 configuration and video layout dial strings

You can change the default video layout on your H.323/SIP Configuration page. If you have chosen a default video layout besides Gallery View, the dial string listed above for Gallery View will join with the selected default video layout. Entering 11 in the dial string will move to the next video layout option and 1111 will move to the third video layout option.

Selected Default 11 in Dial String 1111 in Dial String
Gallery View Full Screen Active Presence
Full Screen Active Presence Gallery View
Active Presence Gallery View Full Screen

Advanced commands

When joining from a SIP/H.323 device into a Zoom Meeting, advanced commands can be added to the dial string to enable certain features, or force certain in-call behavior as well. 

For both SIP and H.323 dial strings, the command will be added at the end of the string.

Dial commands

Command Description
100003 Force sending default video size to the device, max 720p
100004 Favor video for bandwidth (Uses 3/4 Bandwidth for video and 1/4 bandwidth for content).
100005 Equal shared bandwidth for both video and content.
100006 Favor content sharing for bandwidth (Uses 3/4 bandwidth for content and 1/4 Bandwidth for video).
100009 Enable AES-256 encryption.
200001 Force out-of-band DTMF signal.
200006 Suppress audio prompts when joining a meeting.
200009 Video sharing mode for device sharing.
300001 Use Audio Volume Level 1 when joining a meeting.
300002 Use Audio Volume Level 2 when joining a meeting.
300003 Use Audio Volume Level 3 when joining a meeting.
306 Music sharing mode for device sharing.
307 Removes network icons from the in-meeting overlay.
308 Enables dual-screen mode, with Gallery view and Active Speaker view on each display.
309 Enables 1080p video support.
502 Enable noise suppression
503 Disable noise suppression
504 Suppress the visual menu. Can be re-enabled by pressing 7 on a DTMF remote.
505 Disables dual-stream video and forces video and content as a single-stream.
508 Suppress in-meeting reactions displaying from other participants.
601 Hides the meeting ID, when a room system is the first participant to join. 
603 Removes participant names when viewing participant video feeds. 
606

Suppresses the entire in-meeting overlay include participant names for video feeds, network icons, and other visual icons. 
608

Enables dual-screen mode, with Gallery view spread across both displays.
709 

Combines the following dial strings:

    • 100006: Content bandwidth control: Favor Content (2MB total)
    • 200009: Video sharing mode for device sharing.
    • 306: Music sharing mode for device sharing
    • 309: Enable 1080p main video support

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