Get account's TSP information

{
    "dial_in_number_unrestricted": false,
    "dial_in_numbers": [
        {
            "code": "111",
            "number": "000000000",
            "type": "toll"
        }
    ],
    "enable": true,
    "master_account_setting_extended": false,
    "modify_credential_forbidden": true,
    "tsp_bridge": "string",
    "tsp_enabled": true,
    "tsp_provider": "someprovidername"
}