2.0 Circuit Description
2.4 Receiver
Bt8370/8375/8376
Fully Integrated T1/E1 Framer and Line Interface
The online framer continuously monitors for RLOF condition [ALM1;
addr 047] and searches for E1 multiframe alignment after basic frame alignment
is recovered by the offline framer. Receive multiframe alignment is declared
when multiframe alignment criteria are met, as shown in Table 2-2 and Table 2-3.
The receive online framer reports multiframe errors, frame errors, and CRC errors
in the Error Interrupt Status [ISR5; addr 006].
Table 2-2. Receive Framer Modes
T1/E1N
RFRAME[3:0]
Receive Framer Mode
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
000X
001X
010X
011X
100X
101X
110X
111X
0000
0001
0100
0101
0110
1000
1001
1100
1101
FAS Only
FAS Only + BSLIP
FAS + CRC
FAS + CRC + BSLIP
FAS + CAS
FAS + CAS + BSLIP
FAS + CRC + CAS
FAS + CRC + CAS + BSLIP
FT Only
ESF + No CRC (FPS only)
SF
SF + JYEL
SF + T1DM
SLC + FSLOF
SLC
ESF + Mimic CRC
ESF + Force CRC
2-22
Conexant
N8370DSE
CONEXANT [ CONEXANT SYSTEMS, INC ]
