For any SAM4s or Sharp cash register with a serial port programmed to use Datacap’s proprietary DataTran™ command interface
The TwinTran connects to cash registers serial port 
the regular phone jack, and Internet router or modem. 
Merchant parameters must be obtained from bank or 
service provider and provided to Datacap for 
programming.  Merchant info can be loaded at the 
factory or remotely from Datacap servers over the 
phone. Provides fast transaction processing using a 
persistent Internet connection and automatic fail over 
to dial transactions through standard phone line in the 
event of an Internet failure.
SAM4s Cash Registers that Interface with Credit Card Payments
Sharp Cash Registers that interface with Credit Card Payments
Supported Processors TwinTran Network List - Lists the processors and features supported by TwinTran
Datacap Twin Tran Credit Card Interface Information