They are an online settlement system, the best part is batch close and open, and of course all other transactions. They are not using the common ISO8583 format but rather using SPDH. Review collected by and hosted on G2.com.

As they don't have any simulators which can tell us what is wrong in a transaction, we need to connect with them every time. Also, for timeout testing, we need to connect with them on call every time. Review collected by and hosted on G2.com.