VoIP Outdoor Coin-Card Operated Payphone coins or a smart IC card is acceptable to make a VoIP call The outdoor wall-mounted payphone is designed designed for communication at outdoor public sites such as parks, streets, resorts. Calls can be made/received through VoIP which can help operators reduce investment.The end user can insert coins or a smart card (for model GRIPS-V8-B only) to make or ...