Larsen & Toubro Limited is bringing Compact GSM Modem. Larsen & Toubro Limited is an ISO 9001 certified company. The Compact GSM Modem is a wire free, real time telemetric data collection system. The Compact GSM Modem is controlled by GSM technology. This Compact GSM Modem uses GSM networks. Some of the key specifications of the Compact GSM Modem are such as: