... on finance,water supply,environment protection, electric power system,post and weather fields.A. Wireless Specification1. ... scheme: CS-1, CS-2, CS-3 and CS-46. CSD transmission rates: 2.4, 4.8, ... Services Data (USSD) support8. Compliant to GSM Phase 2/2+9. Class 4 (2W) at EGSM 90010. ... ~230400bits/s Indicator lights: Power, Online, Alarm, System, Link/ACT Antenna interface: standard SMA female interface, ...