ADC DSX-1 Manuale utente

ADCP-80-348

Issue 1, May 1995

Page 8

ADCP-80-348

DSX-1

Cross-Connect Procedures

4-12000-0069

ADCP-80-348

Issue 1, May 1995

Page 9

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

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

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

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

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.

D F

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

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

5 CONDUCTOR

JUMPER WIRE TWISTED PAIRS

CROSS-CONNECT

TERMINAL BLOCKS

1418-A

RN TN

Figure 3. DSX-1, DSX-1C Cross Connection

ADCP-80-348

Issue 1, May 1995

Page 6

(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

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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