NEC NDA-24300 manual Transmission Data to Smdr Equipment

SYSTEM OPERATIONS

7.1 Transmission Data to SMDR Equipment

(1)Transmission Format

As seen in the figure below, the basic information to be transmitted (Transmission Message) is a block which begins with Start of Text (STX) and ends with End of Text (ETX). When the call ends, the whole contents of this information is transmitted to the SMDR equipment.

S S U

T A A X

TRANSMISSION MESSAGE

E

T X

STX:	START OF TEXT
ETX:	END OF TEST
SA:	SYSTEM ADDRESS
UA:	UNIT ADDRESS

(2)Transmission Message

One transmission message consists of 128 bytes of data. Each byte represents by ASCII codes the data to be transmitted (Refer to Table 6-3). The contents of the data to be transmitted vary with the kind of call, but the first byte is always transmitted by ASCII code K (4B hex.). The second byte to be transmitted is the data which specifies the kind of call.

Note: In case the Fusion service is involved, the message can consist of more than 128 byte data.

Figure 6-14shows the transmission message of an outgoing call. Figure 6-15shows the transmission mes- sage of an incoming call. Also, Figure 6-16shows the transmission message of a station-to-station call.

CHAPTER 6 NDA-24300

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