ADC DSX-1 Manuale utente
ADCP-80-348
Issue 1, May 1995
Page 8
© 1995, ADC Telecommunications, Inc.
ADCP-80-348
DSX-1
Cross-Connect Procedures
4-12000-0069
ADCP-80-348
Issue 1, May 1995
Page 9
© 1995, ADC Telecommunications, Inc.
DSX-1 CROSS-CONNECT PROCEDURES
Content Page
1. CROSS-CONNECT ROUTING RULE PARAMETERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . .1
2. CROSS-CONNECT CABLE TYPE, LENGTH, AND LEVELS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
3. DSX BAY ZONING AND CROSS-CONNECT GUIDELINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
4. CROSS-CONNECT JUMPER ROUTING RULES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
5. DSX-1 CROSS-CONNECT ROUTING PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Contents herein are current as of the date of publication. In no event will ADC be liable for any special, incidental or consequential damages or
commercial losses, even if ADC has been advised thereof, as a result of issue of this publication. ADC reserves the right to change the contents
without prior notice.
This publication may be verified at any time by contacting ADC’s Technical Assistance Center at 1-800-366-3891, extension 3475, or by writing to
ADC Telecommunications, Inc., Attn: Technical Assistance Center, Mail Station #80, 4900 West 78th Street, Minneapolis, MN 55435.
ADCP-80-348
Issue 1, May 1995
Page 1
© 1995, ADC Telecommunications, Inc.
1. CROSS-CONNECT ROUTING RULE PARAMETERS
A. General Routing Rules
1.01 Several basic rules should be followed in routing
cables to the DSX system:
• Input and output digital signals should always be
in separate cables.
• DS-1,DS-1C,andDS-2cablesshouldnotberouted
above bays or in a lineup associated with electro-
mechanical or crossbar switching equipment.
• DS-1, DS-1C, and DS-2 cables should not run
parallel with power or ground cabling.
B. Cross-Connect Lengths
1.02 The DSX cross-connect jumpers also add to digi-
tal signal-level losses depending on jumper length. To
assure reliable signal levels, maximum jumper lengths
recommended for each DSX frame are:
• DSX-1 and DSX-1C: 85 feet (25.9 m).
• DSX-2: 15 feet (4.6 m).
C. Cross-Connect Types
1.03 The recommended types of cross-connect wire
for each digital rate are:
• DSX-1 and DSX-1C non-shielded, tinned 24
AWG, twisted pair wire.
• DSX-2 Circuits Concentration Bay (CCB) type
cross-connect cords for Bantam modules, and
shielded pair 26 AWG wire with shield grounded
at one end for Longframe (310) panels.
ADCP-80-348
Issue 1, May 1995
Page 2
© 1995, ADC Telecommunications, Inc.
2. CROSS-CONNECT CABLE TYPE, LENGTH, AND LEVELS
A. Cable Types
2.01 All DS-1, DS-1C, and DS-2 cables should be
shielded twisted pair with the shields grounded at one
end only (preferably the equipment end). The recom-
mended cable types are:
• DS-1, 655 feet (200 m): AT&T 600C or equivalent.
• DS-1, 450 feet (137 m): AT&T 1249 or equivalent.
• DS-1C, 655 feet (200 m): AT&T 600C or equivalent.
• DS-2, 1050 feet (320 m): AT&T 600C or equivalent.
B. Cable Length and Gauge
2.02 The digital equipment terminated on the DSX
frames have equalizers and/or pads which are adjusted
for the particular cable lengths to maintain the proper
transmission levels. The maximum cable length be-
tween digital equipment and DSX frames are governed
by the specific items of equipment and cable gauges as
follows:
• DS-1 and DS-1C, 22 AWG: 655 feet (200 m).
• DS-2, 22 AWG: 1050 feet (320 m).
C. Signal Levels
2.03 Each DSX frame serves as an equal level trans-
mission point, and all digital signals crossing a DSX
frame must be maintained within a certain voltage
range for each specific bit rate. The peak-to-base volt-
age ranges for DSX frames are:
• DSX-1: ± 2.4 to 3.6 volts (± 3.0 volts, nominal).
• DSX-1C: ± 2.3 to 4.2 volts (± 3.0 volts, nominal).
• DSX-2: ± 0.55 to 1.3 volts (± 1.0 volt, nominal).
ADCP-80-348
Issue 1, May 1995
Page 3
© 1995, ADC Telecommunications, Inc.
3. DSX BAY ZONING AND CROSS-CONNECT GUIDELINES
A.Cross-Connect Procedures
3.01Figure 1is a lineup of multiple DSX bays.
Each bay is zoned in quadrants to provide the most
efficient cross-connect scheme, maximizing the use
of the vertical and horizontal wireways. When a
cross-connect assignment is required, the following
must be considered:
•If the originating equipment is in zone one or
two, the cross-connect jumper(s) must route to
the adjacent bay via the upper wireway.
•If the originating equipment is in zone three or
four, the cross-connect jumper(s) must route to
the adjacent bay via the lower wireway.
•Cross-connect jumper(s) must always be routed
through vertical and horizontal wireways when
crossing zones, except when cross-connecting
within the same DSX panel.
•Whencross-connecting withinthe samebay from
zone one (upper left) to zone three (lower left),
the cross-connect jumper(s) must transition
through the vertical wireway only.
HORIZONTAL
JUMPER
WIREWAYS
VERTICAL
JUMPER
WIREWAYS
HORIZONTAL
JUMPER
WIREWAYS
5751-B
BAY 1 BAY 2 BAY 3
ZONE
ONE ZONE
TWO
ZONE
THREE ZONE
FOUR
Figure 1. DSX Bay Cross-Connect Scheme
ADCP-80-348
Issue 1, May 1995
Page 4
© 1995, ADC Telecommunications, Inc.
4. CROSS-CONNECT JUMPER ROUTING RULES
A.Cross-Connect Cabling
4.01Cross-connect jumpers should be routed as
shown in Figure 2. Whenever a cross-connect changes
direction, it should do so at a point where a ring, tray
or fanning strip is placed. This allows the cross con-
nect to be dressed neatly without strain orinterference
with any other portion of the bays.
4.02All cross connect jumpers should use the hori-
zontal cable ways between bays, and vertical cable
ways within bays. To prevent unnecessary jumper
buildup and congestion, all discontinued cross con-
nects should be removed from the DSX cable ways.
Jumpers should be sized to the proper length, including
a maximum of 3 inches of slack at each end.
A
AB
E
C
D
D F
C
B
ORIZONTAL
JUMPER
WIREWAYS
CROSS-
CONNECT
JUMPER
VERTICAL
JUMPER
WIREWAYS
ORIZONTAL
JUMPER
WIREWAYS
1860-C
BAY 1 BAY 2 BAY 3
ROUTING RULES
A. All jumpers in the left-hand side of the cross-connect field should enter and
leave the bay from the left vertical wireways.
B. All jumpers in the right-hand side of the cross-connect field should enter
and leave the bay from the right vertical wireways.
C. All intrabay cross-connects should use the vertical rings except when
terminations are in the same panel.
D. All interbay cross-connects should use the horizontal wireways.
E. All jumpers originating in the upper half of the cross-connect field should
route via the upper horizontal wireways.
F. All jumpers originating in the lower half of the cross-connect field should
route via the lower horizontal wireways.
Figure 2. Jumper Routing Rules
ADCP-80-348
Issue 1, May 1995
Page 5
© 1995, ADC Telecommunications, Inc.
5. DSX-1 CROSS-CONNECT ROUTING PROCEDURE
5.01Follow the standard operating procedures for the
routing of cross-connects based on local practice. For
DSX-1 Bays and Modules, ADC recommends the use
of five conductor jumper wire consisting of two inde-
pendently twisted pairs (Signal Transmission) and a
binding wire (used for Tracer Lamp identification).
(Refer to Section 1 – Cross-Connect Routing Rule
Parameters).
5.02Follow the steps as defined in your local practice
or those indicated below to run a DSX-1 Cross-Con-
nect Jumper.
1.Once the equipment assignments have been de-
termined, strip the open end of the jumper wire
as it comes off the spool.
Caution: After properly stripping jumper wires,
inspect area to ensure the removed insulation
and wire clippings did not fall or land in the
confines of the DSX bay line up.
2.At the originating end of the cross-connect, ter-
minate the jumper wires to the IN and OUT – TN
(tip normal) and RN (ring normal) wire wrap
terminals respectively. Terminate the green
jumper wire to the TL (tracer lamp) wire wrap
terminal. Inspect the wire wrap connections (see
Figure 3).
OUT
TL
IN
TL
IN
OUT
5 CONDUCTOR
JUMPER WIRE TWISTED PAIRS
CROSS-CONNECT
TERMINAL BLOCKS
1418-A
TN
RN
TN
RN TN
RN
TN
RN
Figure 3. DSX-1, DSX-1C Cross Connection
ADCP-80-348
Issue 1, May 1995
Page 6
© 1995, ADC Telecommunications, Inc.
(continued)
5. DSX-1 CROSS-CONNECT ROUTING
PROCEDURE, continued
3.Carefully route the cross-connect jumper wire
towards the terminating equipment ensuring that
the zoning and routing procedures are followed
as defined in Section 3 and 4. Figure 4 provides a
pictorial view of the paths to be followed when
routing via the upper and lower wireways.
4.Afterthe cross-connect hasbeen properly routed,
cut and strip the terminating end being careful to
ensure the insulation and wire clippings do not
fall into the DSX bays.
5.Repeat Step 2 for this end of cross-connect
jumper.
6.Complete a final inspection of the cross-connect
to ensure it is neat and properly placed within the
wireways and the cable rings.
5752-C
BAY 1 BAY 2 BAY 3 BAY 4
Figure 4.
Do not pull jumper too tight — leave minimal slack
and store evenly at each end (six inches total)
ADCP-80-348
Issue 1, May 1995
Page 7
© 1995, ADC Telecommunications, Inc.
ADC Telecommunications, Inc.
4900 West 78th Street • Minneapolis, Minnesota 55435
Fax: (612) 946-3293 • Toll Free: 1-800-366-3891
In Minnesota: (612) 938-8080
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