new delhi, June 4 -- Telecom companies sparring with the regulator over spam calls and messages have reason for relief: After an appeals tribunal stayed penalties on them for failing to curb spam, the Department of Telecommunication (DoT) has rejected the regulator's request to encash bank guarantees for the same breach. The Telecom Regulatory Authority of India (Trai) has fined telcos more than Rs.140 crore over the years for failing to curb spam. The telcos secured an interim stay from the Telecom Disputes Settlement and Appellate Tribunal (TDSAT) in January on the case. Telcos told TDSAT that it is not fair to punish them for failing to curb spam given the delay in implementing long-delayed spam prevention rules. While TDSAT is expected ...