Datasheet

DS3112
79 of 133
Bits 8 to 12: Transmit BERT Port Select Bits 0 to 4 (TBPS0 to TBPS4). These bits determine if the transmit
BERT will be used to replace the normal transmit data on any of the 28 T1 or 16/21 E1 transmit ports or at the
T3/E3 transmit formatter. If these bits are set to 11101, data from the transmit BERT is only placed in the payload
bit positions of the T3/E3 data stream. If these bits are set to 11110, then data from the transmit BERT is placed
into all bit positions of the T3/E3 data stream (payload and the overhead bits).
TBPS4:0
00000 No Data 01000 Port 8
00001 Port 1 01001 Port 9
00010 Port 2 01010 Port 10
00011 Port 3 01011 Port 11
00100 Port 4 01100 Port 12
00101 Port 5 01101 Port 13
00110 Port 6 01110 Port 14
00111 Port 7 01111 Port 15
10000 Port 16 11000 Port 24
10001 Port 17 11001 Port 25
10010 Port 18 11010 Port 26
10011 Port 19 11011 Port 27
10100 Port 20 11100 Port 28
10101 Port 21 11101 T3/E3 Framer (payload bits only)
10110 Port 22 11110 T3/E3 Framer (payload + overhead bits)
10111 Port 23 11111 Illegal State