Use the Protocol Type field at the top of the PSTN Channel tab to specify the communications protocol that the Phoenix channel uses.
IEC 60870-5 Phoenix PSTN channels support the IEC 60870-5-101 protocol. This protocol is used for serial communications.
The fields within the IEC 60870-5-101 Parameters section of the tab are ‘grayed out’ and displayed for information only. Their values are fixed to those settings that are supported by Phoenix outstations. For more information on these fields, see Configure IEC 60870-5-101 Protocol Properties in the Geo SCADA Expert Guide to the IEC 60870-5 Driver.