Ricoh B079 - Sig4 Board

BOARDS
B547 124 SM
4.2.5 SIG4 BOARD
The SiG4 (Standard ISDN G4) board contains ICCP (ISDN Communication Control
Processor), Flash ROM, DRAM, LAPD controller, CODEC, ISDN interface and
analog interface. The ICCP controls the entire board.
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 used
Flash
ROM
DRAM
ICCP
SYSTEM BUS
SiG4
CODEC
LAPD
Controller
ISDN
Interface
Bch
Reset
Circuit
Dch
Analog I/F
Circuit
ISDN
FCU
MODEM
H548D500.WMF
CÓPIA NÃO CONTROLADA
CÓPIA NÃO CONTROLADA