BT8375 CONEXANT [Conexant Systems, Inc], BT8375 Datasheet - Page 172

• Manufacturer Part Number: BT8375
• Description: single chip transceivers for T1/E1 and Integrated Service Digital Network (ISDN) primary rate interfaces
• Manufacturer: CONEXANT [Conexant Systems, Inc]

3.8 Receiver Registers
Table 3-13. Receive Yellow Alarm Set/Clear Criteria
3-54
Y0
Y0_INT
Y16
Y16_INT
YB2
YB2_INT
YJ
YJ_INT
Y24
Y24_INT
YF
YF_INT
Mode
Set for 4 frames (500 s) if 2 consecutive NFAS frames each contain TS0 bit 3 = 1. Cleared for 4 frames if 2
consecutive NFAS frames each contain TS0 bit 3 = 0.
Set for 16 multiframes (32 ms) if every NFAS frame contains TS0 bit 3 = 1. Cleared for 16 multiframes if 1 or
more NFAS frame contains TS0 bit 3 = 0.
Set for 2 multiframes (4 ms) if frame 0 in 2 consecutive multiframes each contain TS16 bit 6 = 1. Cleared for
2 multiframe if frame 0 in 2 consecutive multiframes each contain TS16 bit 6 = 0.
Set for 16 multiframes (32 ms) if every frame 0 contains TS16 bit 6 = 1. Cleared for 16 multiframes if 1 or
more frame 0 contains TS16 bit 6 = 0.
Set for 1 frame (125 s) if all 24 time slots contain bit 2 = 0. Cleared for 1 frame if 1 or more time slots
contain bit 2 = 1.
Set for 192 frames (24 ms) if fewer than 15 time slots contain bit 2 = 1. Cleared for 192 frames if 15 or more
time slots contain bit 2 = 1.
Set for 1 multiframe (1.5 ms) if frame 12 contains Fs bit = 1. Cleared for 1 multiframe if frame 12 contains
Fs bit = 0.
Set for 16 multiframes (24 ms) if each frame 12 contains Fs bit = 1. Set for 16 multiframes (24 ms) if 1 or
more frame 12 contains Fs bit = 0.
Set for 1 frame (125 s) if TS24 contains bit 6 = 0. Cleared for 1 frame if TS24 contains bit 6 = 1.
Set for 192 frames (24 ms) if each TS24 bit 6 = 0. Cleared for 192 frames if 1 or more TS24 bit 6 = 1.
Set for 32 frames (4 ms) if 16 FDL bits contain Yellow Alarm priority codeword pattern (00FFh). Cleared for
32 frames if 16 FDL bits do not contain a Yellow Alarm priority codeword pattern.
Set upon reception of 16 FDL bits matching Yellow Alarm priority codeword and remains set as long as the
codeword pattern is not interrupted for greater than 100 ms. Cleared when the Yellow Alarm priority
codeword is not present for more than 100 ms (26 missing codewords = 104 ms).
Conexant
Set/Clear Criteria
Fully Integrated T1/E1 Framer and Line Interface
Bt8370/8375/8376
N8370DSE