Amazon.com: GSM Modem with Maestro M100 SL6087 Module RS485 Interface Wireless at Commands SMS Data TCP/IP SmartPack : Electronics
Ensemble Solutions Group - Maestro M110 modems are designed to provide connectivity across a broad range of M2M and IoT applications. They allow Internet connectivity via serial port to PLCs, Meters, Vending
Project: Trying to Revive a Maestro ZXR 2400 External Modem | Gough's Tech Zone
Embedded Works - Maestro Wireless M100CDMAPLUS-V-Bun 2G CDMA/1xRTT Modem