Ricoh 5510L - Sig4 Board

PCBS 14 June, 2002
6-50
6.4.7 SIG4 BOARD
The SiG4 (Standard ISDN G4) board contains the ICCP (ISDN Communication
Control Processor), Flash ROM, DRAM, LAPD controller, CODEC, ISDN interface
and analog interface.
ICCP (ISDN Communication Control Processor)
• 16 bit CPU, which controls the entire board
• HDLC control
• Channel select for B channel interface control
CODEC
• A/D, D/A converter for ISDN G3 communication
LAPD Controller
• ISDN layer 1 and LAPD control
ROM
• 512 kB (4 Mbit) Flash ROM for system software storage
DRAM
• 2MB (16 Mbit) DRAM
ISDN
Flash
ROM
DRAM
ICCP
SYSTEM BUS
SiG4
CODEC
LAPD
Controller
ISDN
Interface
Bch
Reset
Circuit
Dch
Analog I/F
Circuit
FCU
MODEM
H310D941.WMF