Due to the different characteristics of different products, Shenzhen Black Gold provides different after-sales service commitments for different product failures as follows:

Product Type                                                   Service Commitment Main Terms

IP series products                                            providing free on-site service within three months

Campus network product line                         providing free on-site service within three months, free upgrade when new version is available within 1 year

Metropolitan area network product series      providing free on-site service within half a year, free upgrade when new version is available within 1 year

The dongle has a one-year warranty and the replacement dongle module is a product replacement, not covered by the warranty or free upgrade.

(The term is calculated from the date of receipt of the product, and the service only covers the solution provided by Shenzhen Black Gold products.)