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What Are the Legacy Dial Strings Formats?


How to make a SIP or H.323 call?

When calling from a legacy (non-Vidyo) H.323 or SIP endpoint please refer to the below table for formatting.

  • Vidyo users must use a comma as the delimiter when dialing into Legacy MCUs and/or border controllers acting as H.323 gatekeepers. For more information on dialing summaries, see the next chapter.
 Endpoint  TCS4 delimiter  Alphanumeric Dialing string 
 Codian  !  No!35001
 LifeSize ## Yes
 Polycom  ## Yes
   @    035001@
 Sony # No
 Tandberg      35001@,035001
 SCOPIA     12345@


  • The Tandberg MXP platform doesn’t support TCS4 delimiters when dialing over IP. To dial from a Tandberg MXP into a VidyoConference, dial the VidyoGateway service prefix followed by the Vidyo user’s extension then @ and the IP address of the VidyoGateway as shown in the Tandberg MXP Dialing String entry shown previously.

  • As of release version TC4.1.2, it’s now possible to dial using the format name@domain or name@IPAdress without being registered to a gatekeeper.


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    Pierre Weber

    For Scopia like orange Businness Service : the dialtring from VIDYO HD ->

    <Prefix> | < Meeting Room > *** < Pin Code | Chairperson >



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