Interaction ways

COR(Carrier Operated Relay) signal

COR signal is a signal from a receiver that indicates when a carrier or signal is being received and that the receiver is unsquelched.

TETRA PEI(Peripheral Equipment Interface)

The TETRA PEI provides a link between a Data Terminal, TE2, such as a Personal Computer (PC) or specialist data terminal, and a TETRA Mobile Station, MT2 at a reference point RT. The PEI provides external data devices with access to the services offered by a TETRA network.

With respect to data services, the TETRA PEI will be used for the following:
• transmission and reception of packet data (including setting of packet data control and QoS parameters) - V+D only;
• transmission and reception of circuit data (including setting of circuit data parameters); and
• transmission and reception of short data (including setting of short data parameters).

In addition to data services the TETRA PEI may be used for the following:
• set-up and control of speech calls (including setting of speech call parameters);
• access to general information of MT2 and network; and
• access to user applications located in MT2.

Ref. Final draft ETSI EN 300 392-5 V2.2.0 (2010-03)

P25 ISSI(Inter RF Subsystem Interface)

The Inter Sub-System Interface (G) or ISSI permits multiple RF Sub-Systems to be interconnected together into wide-area networks. The ISSI defi nes a multi-channel digital interface supporting standard protocols to enable interoperability utilizing mobility management and wide-area service support functionality. The interface is designed to give system designers the fl exibility to combine any number of RF Sub-Systems of any size. The Inter Sub-System Interface also provides a common meeting place for RF Sub-Systems of different technologies (TDMA, FDMA, micro-cell) and different RF bands. This interface is optional, and need only be supported when intercommunication amongst and across RFSS’s of Land Mobile Radio systems is desired.

The ISSI will support:
• mobility and data management
• wide area service control
• service transport
• end to end protection of signaling information
• trunking
• other network interconnection

Ref. https://en.wikipedia.org/wiki/P25_ISSI

DMR AIS(Application Interface Specification)

The DMR Associations Application Interface (AIS) provides a common protocol to enable DMR Association members to develop a wide variety of applications that enable intelligent connectivity with DMR systems infrastructure.

Ref. https://www.dmrassociation.org/dmr-applications-interface.html