W890: GSM Outdoor Coin-Card Payphone W990: CDMA Outdoor Coin-Card Payphone The wireless outdoor payphones W890 and W990, are designed to offer a convenient and profitable solution for locations where wireless connection is more accessible than PSTN, e.g. rural area, islands? 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.