Wavecom W61PC V7.5.0 - Manual (Page 128)

118  Transmission Modes WAVECOM Decoder W61PC/LAN Manual V7.5
BIIS
Binary Interchange of Information and Signaling is an ETSI-standard (ETS 300 230) used for transmission
of signaling information for selective calls, status messages, short text messages and data.
Parameter Value
Frequency range VHF/UHF
Operation modes CRC and parity
Modulation FM, SUB FFSK
Symbol rate 1200 Baud
Center frequency 1500 Hz
Shift 600 Hz
Receiver settings FM, BW = 15 kHz
Input format(s) AF, IF
Additional Info Signaling data, Short Data transfer, HDLC possible, ETSI-standard (ETS 300
230)
The system operates at 1200 Bit/s using indirect FSK modulation in the VHF or UHF band. To accommo-
date the different types of data, a number of code words have been defined. Every transmission consists
of at least one address word. Additional data such as telephone numbers or short text messages may be
appended to the address word as one or more data blocks.
For the transmission of longer data packets the High-Level Data Link Control (HDLC) protocol may be im-
plemented in the BIIS devices.
Status messages are transmitted within the address word. The address word contains the Operational
Mode Characteristic (OMC), a regional code indicating the country of the device, a common address part,
the transmitter address and the receiver address. The address data is displayed in hexadecimal format.
OMC code and regional code are displayed as short strings. There are 64 OMC codes consisting of a cate-
gory part (CAT) and a function part (FNC). Some codes are custom, status or reserved codes. The follow-
ing table shows all valid codes in string and binary representation.