ds265188-port-t1-e1-j1-transc Maxim Integrated Products, Inc., ds265188-port-t1-e1-j1-transc Datasheet - Page 90
![no-image](/images/no-image-200.jpg)
ds265188-port-t1-e1-j1-transc
Manufacturer Part Number
ds265188-port-t1-e1-j1-transc
Description
Ds26518 8-port T1/e1/j1 Transceiver
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.DS265188-PORT-T1-E1-J1-TRANSC.pdf
(313 pages)
- Current page: 90 of 313
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9.12.2.1
The DS26518 transmitters can be selected individually to meet the pulse templates for E1 and T1/J1 modes. The
T1/J1 pulse template is shown in
shape can be configured for each LIU on an individual basis. The LIU transmit impedance selection registers can
be used to select an internal transmit terminating impedance of 100Ω for T1, 110Ω for J1 mode, 75Ω or 120Ω for
E1 mode or no internal termination for E1 or T1 mode. The transmit pulse shape and terminating impedance is
selected by
measured for compliance at the appropriate network interface (NI). For T1 long haul and E1, the pulse shape is
measured at the far end. For T1 short haul, the pulse shape is measured at the near end.
Figure 9-22. T1/J1 Transmit Pulse Templates
LTIPSR
DSX - 1 Template (pe r ANSI T1.102 -
1993)
Transmit-Line Pulse Shapes
- 0.1
- 0.2
- 0.3
- 0.4
- 0.5
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
- 500
registers. The pulse shapes will be compliant to T1.102 and G.703. Pulse shapes are
MAXIMUM CURVE
- 0.77
- 0.39
- 0.27
- 0.27
- 0.12
0.00
0.27
0.35
0.93
1.16
UI
- 400
Time
- 500
- 255
- 175
- 175
- 75
0
175
225
600
750
T1.102/87, T1.403,
CB 119 (Oct. 79), &
I.431 Template
- 300
Amp.
0.05
0.05
0.80
1.15
1.15
1.05
1.05
- 0.07
0.05
0.05
Figure
- 200
- 0.77
- 0.23
- 0.23
- 0.15
0.00
0.15
0.23
0.23
0.46
0.66
0.93
1.16
MINIMUM CURVE
UI
9-22. The E1 pulse template is shown in
Tim e
- 500
- 150
- 150
- 100
0
100
150
150
300
430
600
750
- 100
Amp.
-0.05
-0.05
0.50
0.95
0.95
0.90
0.50
-0.45
-0.45
-0.20
-0.05
-0.05
0
90 of 313
TIME (ns)
DS1 Template (per ANSI T1.403 -
1995)
100
MAXIMUM CURVE
-0.77
-0.39
-0.27
-0.27
-0.12
0.00
0.27
0.34
0.77
1.16
UI
Time
-500
-255
-175
-175
-75
0
175
225
600
750
200
Amp.
0.05
0.05
0.80
1.20
1.20
1.05
1.05
-0.05
0.05
0.05
300
-0.77
-0.23
-0.23
-0.15
0.00
0.15
0.23
0.23
0.46
0.61
0.93
1.16
MINIMUM CURVE
UI
400
DS26518 8-Port T1/E1/J1 Transceiver
Time
-500
-150
-150
-100
0
100
150
150
300
430
600
750
500
Figure
Amp.
-0.05
-0.05
0.50
0.95
0.95
0.90
0.50
-0.45
-0.45
-0.26
-0.05
-0.05
600
9-23. The transmit pulse
700
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