New Delhi, Sept. 12 -- The Mumbai customs department has approached the Supreme Court, challenging three Reliance group companies, Reliance Sibur Elastomers Pvt. Ltd, Reliance Corporate IT Park Ltd, and Reliance Digital Platform & Project Services Ltd, over the higher import duty levy on their Cisco UC/IP phone shipments.

The case came before a bench of Justices Manoj Mishra and Ujjal Bhuyan on Friday, who adjourned the hearing to next Friday (19 September).

Customs and Reliance are disputing how to classify the imported Cisco phones under India's Customs Tariff Act, 1975.

Customs reclassified the VoIP desk phones as video conferencing equipment, which carries a higher duty. Reliance argued that the devices lacked cameras, did not supp...