for (let i = 0; i < frameCount; i++) {
            const srcStart = 7 * i;
            const dstStart = 8 + 9 * i;
            Telegram.extractSeptett(this.frameData, srcStart, srcStart + 7, buffer, dstStart);
            Telegram.calcAndSetChecksum(this.minorVersion, buffer, dstStart, dstStart + 8);