points of sale or service . according to various embodiment , a point of sale or service includes a register , a peripheral and a protocol converter . the protocol converter communicatively couples the register and the peripheral . the register may communicate with the protocol converter using a first protocol while the peripheral communicates with protocol converter using a second protocol . the register and the protocol converter may communicate using tcp / ip . a second peripheral may communicate with the register using the first protocol and without the aid of the protocol converter . the point of sale or service may further include a processor communicatively coupled to the protocol converter , for accessing the first peripheral .