... be online, including audio, SMS and data. Also, it supports double or several data centers.This product has been widely used ... , environment protection, electric power system, post and weather fields.A. Wireless Specification1. Compliant with S-95 A/B and CDMA2000 1xRTT2 ... domain name(DDNS) and IP access to data center7. Support double data centers, one main and another backup8. Support multi data ...