List SMS Link Group
Within the Configuration module, the SMS section allows you to manage the SMS settings for your DIDs. Note that for sending and receiving SMS through the API, you will need to use the SMS API’s that can be found at this link.
listSmsLinkGroup method: This method allows you to retrieve the list of your SMS link groups. The id of the SMSLinkGroup returned by this method will be needed to edit or delete that SMS Link group.