The wireless outdoor card-operated payphone W893W993, is designed to offer a convenient and profitable solution for locations where GSM/CDMA wireless connection is more accessible than PSTN, e.g. rural area, islands, temporary events? Adding to the support from our versatile Compatible Payphone Management System (CPMS), operators can also benefits from an easy supervision and maintenance of payphones with maximum revenue. eric yang ericyangATguanri.com.cn