Table of Contents
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COMSPHERE 3500 Series Data Service Units
DATAPHONE II, multipoint network, 2-4
DDS, 4-24
data rate, 1-4
default strap settings, 4-14
S1, 4-16
S2, 4-17
S3, 4-17
S5, 4-18
descriptions
S1, 4-24
S2, 4-25
S3, 4-25
S4, 4-25
S5, 4-25
strap settings, 4-24
Device Test, 3-6, B-1
diagram, 3-6
procedures, 3-7
results, 3-7
diagnostic
message clamping, S5 description, 4-26
test, 3-5
diagram
Channel Loopback, 3-14
Device Test, 3-6
Digital Test
multipoint, 3-10
point-to-point, 3-8
Local Loopback, 3-12
Digital Loopback, B-1
(remote), S1 description, 4-24
digital network
connection, 4-10
connectors, A-1
interface (RJ48T), pin assignments (Model 3511),
A-2
RJ48S connector pins (Model 3510), A-1
Digital Test, B-1
(point-to-point), diagram, 3-8
command, 3-18
multipoint, 3-10
diagram, 3-10
procedure, 3-11
test results, 3-11
point-to-point, 3-8
procedure, 3-9
test results, 3-9
Disable/Enable command, 3-18
disruptive test commands, 3-18
DL indicator, 3-3
Dsbl/Fail indicator, 3-3
DSR
always ON, S5 description, 4-25
indicator, 3-4
normal during Local Loopback, S1 description, 4-24
DSU
compatibility, 2-3
line requirements, 1-4
timing chart, B-2
DTE interfaces, 1-5
Index-2
E
EIA-232-D
connector, A-3
DTE interface (S3), 4-25
interface test mode indication, S5 description, 4-25
Local Loopback (S3), 4-25
elastic store, S1 description, 4-24
electrostatic discharge (ESD) precautions, 4-2
emissions, 1-5
emulation, 2600 Series DSU, 3-18
environment, 1-4
equipment
list, C-1
support, 1-6
warranty, 1-6
ESD precautions, 4-2
F
faceplate
disable, S3 description, 4-25
indicators, 3-2
Model 3510, 3-1
Model 3511, 3-5
operation, 3-5
removal procedure, 4-12
FAIL/STR/DSBL indicator, 3-3
fan module cooling requirements, 4-2
feature number, C-1
features, 1-3
flowchart
No Signal condition, 3-16
Out-of-Service condition, 3-15
Streaming Terminal condition, 3-17
frame ground, S5 description, 4-25
fuse location, Model 3511, 4-13
G
ground, signal-frame, S5 description, 4-25
H
heat dissipation, 1-4
humidity, 1-4
July 1999
3510-A2-GN32-70
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Table of Contents
Troubleshooting
