2.0 Circuit Description
Bt8370/8375/8376
2.9 Transmit Line Interface Unit
Fully Integrated T1/E1 Framer and Line Interface
2.9.1 Pulse Shape
Normalized and isolated AMI output pulses fit the T1/E1 pulse templates in
Figures 2-35 and 2-37 when measured in accordance with the test circuits in
Figures 2-36 and 2-38. Table 2-15 through Table 2-22 list the pulse template
corner points. An isolated pulse is defined as a 1 followed by seven 0s for T1, and
a 1 followed by three 0s for E1. The pulse templates shown in Figures 2-35 and
2-37 come from ANSI T1.403-1995, ITU-T G.703, and ANSI T1.102-1993.
Figure 2-35. Standard DS1 Pulse Template
1.5
1
T1.403-1989
T1.403-1995
T1.102-1987
T1.102-1987
CCITT G.703
CCITT G.703
0.5
0
-0.5
-1
-1
-0.5
0
0.5
1
1.5
Time in Unit Intervals
Figure 2-36. T1 Pulse Template Test Circuit
Cable Length
0 To 655 Ft.
19/22/24/26 AWG
XTIP
VOUT
Bt8370
XRING
RLoad
NOTE(S): R
Load
= 100 Ω ± 5%.
2-70
Conexant
N8370DSE
CONEXANT [ CONEXANT SYSTEMS, INC ]
