Bt8370/8375/8376
Fully Integrated T1/E1 Framer and Line Interface
3.12 Transmitter Registers
077—Transmit Inband Loopback Code Configuration (TLB)
7
6
5
4
3
2
1
0
—
—
—
—
LB_LEN[1]
LB_LEN[0]
UNFRAMED
LBSTART
LB_LEN[1:0]
Inband Loopback Code Length (from LBP):
00 = 4 bits
01 = 5 bits
10 = 6 bits
11 = 7 bits
UNFRAMED
LBSTART
Loopback Code Overwrites Framing
Start Inband Loopback Code Transmission
078—Transmit Inband Loopback Code Pattern (LBP)
7
6
5
4
3
2
1
0
LBP[1]
LBP[2]
LBP[3]
LBP[4]
LBP[5]
LBP[6]
LBP[7]
—
LBP[1]
First bit transmitted
Second bit transmitted
Third bit transmitted
Fourth bit transmitted
Fifth bit transmitted
Sixth bit transmitted
Seventh bit transmitted
LBP[2]
LBP[3]
LBP[4]
LBP[5]
LBP[6]
LBP[7]
N8370DSE
Conexant
3-79