Table of Contents

FCS Protocol for MMDVM & DV4mini HOTSPOTS

FCS Listener-UDP-Port: 62500

LOGIN PING (Poll)

Name Length Values Comment
Signature 4 Byte PING
RPTR-Callsign 6 Byte OE1KBC ASCII filled up with blank 0x20
Reflector 8 Byte FCS00101 ASCI Reflector FCS001 + DG-ID 01
Filler 7 Byte 0x00 filled up with 0x00
total 25 byte

Answer from FCS-reflector

Name Length Values Comment
Signature 6 Byte ONLINE
Filler 1 Byte 0x00 filled up with 0x00
total 7 byte


Name Length Values Comment
Signature 4 Byte CLOSE In ASCII
Filler 7 Byte 0x20 ASCII filled up with blank 0x20
total 11 byte

NO answer from FCS-reflector


OPTIONS FCSO (DG-ID-List to YCS-compatible reflector)

Name Length Values Comment
Signature 4 Byte FCSO ASCII
Reflector 8 Byte FCS00101 ASCI Reflector FCS001 + DG-ID 01
OPTIONS 38 Byte 10;20;77;80; DG-ID separated by ; semicolon filled up with 0x20
total 50 byte


INFO FCSI (Info to YCS-compatible reflector)

Name Length Values Comment
Signature 4 Byte FCSI ASCII
Reflector 8 Byte FCS00101 ASCI Reflector FCS001 + DG-ID 01
RX-Frequency 9 Byte 430600000 ASCII 999999999
TX-Frequency 9 Byte 438200000 ASCII 999999999
Locator 6 Byte JN88EG ASCII
Name/Town 20 Byte Vienna ASCII filled up with blank 0x20
HOTSPOT-Type 12 Byte MMDVM ASCII filled up with blank 0x20
OPENSPOT3 ASCII filled up with blank 0x20
DV4mini ASCII filled up with blank 0x20
YSFGateway-ID 7 Byte 0232155 ASCII 9999999
Filler 5 Byte ASCII filled up with blank 0x20
total 80 byte


INFO (Info to FCS-reflector)

Name Length Values Comment
RX-Frequency 9 Byte 430600000 ASCII 999999999
TX-Frequency 9 Byte 438200000 ASCII 999999999
Locator 6 Byte JN88EG ASCII
HOTSPOT-Type 12 Byte MMDVM ASCII filled up with blank 0x20
OPENSPOT3 ASCII filled up with blank 0x20
DV4mini ASCII filled up with blank 0x20
YSFGateway-ID 7 Byte 0232155 ASCII 9999999
Filler 52 Byte ASCII filled up with blank 0x20
total 100 byte

Answer from FCS-reflector

Name Length Values Comment
Signature 3 Byte ACK
total 3 byte


PAYLOAD (Data)

Name Length Values Comment
FS+FICH 30 Byte see table
PAYLOAD 1 CHECK 5 Byte ??
PAYLAOD 1 AMBE 13 Byte AMBE+
PAYLOAD 2 CHECK 5 Byte ??
PAYLAOD 2 AMBE 13 Byte AMBE+
PAYLOAD 3 CHECK 5 Byte ??
PAYLAOD 3 AMBE 13 Byte AMBE+
PAYLOAD 4 CHECK 5 Byte ??
PAYLAOD 4 AMBE 13 Byte AMBE+
PAYLOAD 5 CHECK 5 Byte ??
PAYLAOD 5 AMBE 13 Byte AMBE+
STATUS 1 Byte (0x00 / 0x01) + 0xFE Status 0,1 + (Count « 1)
Reflector 8 Byte FCS00101 ASCI Reflector FCS001 + DG-ID 01
Filler 1 Byte ASCII filled up with 0x00
total 130 byte