Refusing to permit custodial interrogation of former telecom minister Dayanidhi Maran in an alleged commercial use of high-speed Integrated Digital Switch Network for the family-owned Sun TV, the Supreme Court on Friday asked him to appear before the CBI from November 30 onwards.In an interim order, the apex court bench of Justice T.S. Thakur and Justice V. Gopala Gowda said that Maran would appear before the investigating officer for seven days from November 30 to December 6 from 11.00 a.m. to 5.00 p.m. to answer all the questions. The court said that he would cooperate in the investigation.The court also said that the investigating agency would also give him a questionnaire.