You can find this type of codes in Elnet MS log's. For example - "LOG-ts 2019-07-12 13:46:37.406: SITE-ID 003055127E68 || DEV-ID || GW-TS 2019-07-11 09:02:00 || LIVE-LOG-STS LOG || REC-STS ks ACK-STS 07" In this case, 07 is gateway return code; now ...