The device was connecting to your server as per the Data Acquisition Settings followed on the device. If you set the Min Period and Send Period to 60, then you will receive records every 1 minute. More information can be found on this link: TFT100 Data acquisition settings - Wiki Knowledge Base | Teltonika GPS
Meanwhile, to establish a connection with the device from your server end you need to send an acknowledgment Packet as per the Codec Protocol so you can establish a connection with the device. You may refer to this link for more details: Codec - Wiki Knowledge Base | Teltonika GPS