ADC DISSMRAA User Manual

FCC ID: F8I-DISSMRAA, Partial User Manual, 3 of 4

5.

Insert the optical transceiver into the socket until it locks into place.

6.

Replace the optical transceiver dust cap if it was removed for installation.

7.

Repeat procedure for each optical transceiver that requires installation.

8.

Install a port cover (see Figure 18) over each unused optical transceiver socket.

4.8 Ports 1–6 Optical Connections

ADCP-75-136 • Issue 1 • November 2002

The optical interface between the DHU and each DEU or DRU is supported by six optical
ports. Each of the six optical ports provides a duplex LC-type optical transceiver which is
mounted on the DHU front panel. One side of the transceiver provides the optical fiber
connection for the forward path (downlink) signal. The other side of the transceiver provides
the optical fiber connection for the reverse path (uplink) signal. Use the following procedure to
install the forward and reverse path optical fibers and to connect them to the DHU:

Danger: This equipment uses a Class 1 Laser according to FDA/CDRH rules. Laser radiation

can seriously damage the retina of the eye. Do not look into the ends of any optical fiber. Do
not look directly into the optical transceiver of any digital unit or exposure to laser radiation
may result. An optical power meter should be used to verify active fibers. A protective cap or
hood MUST be immediately placed over any radiating transceiver or optical fiber connector
to avoid the potential of dangerous amounts of radiation exposure. This practice also prevents
dirt particles from entering the transceiver or connector.

1.

Obtain the required lengths of single- or multi-mode fiber optic cable.

2.

Route the fiber optic cable between the DHU and the DEU or DRU (if not already
routed) and cut to required length. Allow sufficient slack for dressing and organizing the
cables at each unit. Maintain a minimum bend radius of 2 inches (50 mm).

Note: The maximum path lengths for the optical fibers are as follows: 500 meters (1,641
feet) for 62.5 micron core multi-mode fiber, 750 meters (2,461 feet) for 50 micron core
multi-mode fiber, and 10 km (32,808 ft) for 9 micron core single-mode fiber.

3.

Terminate each optical fiber with a field-installable LC type fiber optic connector as
shown in Figure 19. Follow the instructions provided by the connector manufacturer for
installing the connector.

4.

Test each fiber for optical loss as described in Subsection 6.4.2 of this manual.

5.

Designate one of the fibers as the forward path fiber and the other as the reverse path
fiber and label both ends of each fiber with the path designation.

6.

Use the plastic joiner provided with the LC connectors to join the DHU Port 1 forward
and reverse path connectors together (see Figure 19). Make sure the forward path and

reverse path connectors are oriented as shown.

Note: When viewing any Port 1-6 optical transceiver from the front, the forward path port is

on the left and the reverse path port is on the right as shown in Figure 20. In addition, single­mode transceivers are colored blue and multi-mode transceivers are colored black or beige.
Both single- and multi-mode transceivers may be mounted on the same DHU.

© 2002, ADC Telecommunications, Inc.

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ADCP-75-136 • Issue 1 • November 2002

FORWARD PATH (TX)

CONNECTOR

REVERSE PATH (RX)

CONNECTOR

OPTICAL CONNECTOR

ASSEMBLY DETAIL

OPTICAL

CONNECTOR

PORT 1

OPTICAL

TRANSCEIVER

CABLE GUIDE

DETAIL

DESIGNATION CARD AND

HOLDER DETAIL

Figure 19. Ports 1–6 Fiber Optic Cable Connections

TRANSCEIVER COLOR CODE

BLUE = SINGLE-MODE (9 MICRON)

BLACK/
BEIGE = MULTI-MODE (50 OR 62.5 MICRON)

CLEAR

PLASTIC

COVER

CARD

HOLDER

CABLE

GUIDES

17274-A

17150-A

FORWARD

PATH (TX)

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© 2002, ADC Telecommunications, Inc.

REVERSE
PATH (RX)

DUST CAP (LEAVE IN PLACE

UNTIL READY TO INSTALL CONNECTOR)

DETAIL DRAWING OF

OPTICAL PORT

Figure 20. Optical Transceiver Designations

7.

Remove the dust caps from the optical fiber connectors and the port 1 optical transceiver.
Note: Leave the dust cap in place on any unused optical transceiver.

8.

Clean each connector (follow connector supplier’s recommendations) and then insert the
optical fiber connector pair into DHU optical port 1 (see Figure 19).

9.

Place the optical fibers within the cable guides provided on the cable management tray (see
Figure 19) and then dress and secure the fibers at the DHU per standard industry practice.

10. Connect the forward and reverse path optical fibers to the DEU or the DRU as specified
in the instructions provided with that unit.

11. Use the designation card provided (see Figure 19) to indicate the location and name of
the DRU or DEU that is connected to each optical fiber pair. The designation card holder
may be attached to any convenient flat surface such as the DHU cable management tray

12. Repeat steps 1–11 for each remaining optical port.

4.9 DC Power Connections

ADCP-75-136 • Issue 1 • November 2002

The DC power interface between the DHU and each DRU is supported by six RJ-45 female
connectors. Each DHU RJ-45 connector provides nominal 48 Vdc power for the associated
DRU except when the DRU is powered with an ac/dc converter. A category 3 or 5 twisted pair
cable is used to feed the power from the DHU to the DRU. Use the following procedure to
install the DC power cable and to connect it to the DHU.

1.

Obtain the required length of category 3 or 5 twisted pair cable.

2.

Route the cable between the DHU and the DRU (unless already routed) and then cut to
required length. Allow sufficient slack for dressing and organizing the cable at the DHU.

Note: The maximum distance for routing power cable is 500 meters (1,641 feet).

3.

Terminate each end of the cable with a male RJ-45 connector. Match the wire color to
the connector pin as specified in Table 6.

Caution: The DRU will be damaged if the RJ-45 connector is wired incorrectly.

4.

Perform a continuity test to verify that each wire is properly connected to the terminating
RJ-45 connector and check the connector for correct polarity (see diagram in Table 6).

Table 6. RJ-45 Connector Pin Designations

PIN NUMBER WIRE COLOR CONNECTOR PINS

1
2
3
4
5
6
7
8

White/Green
Green
White/Orange
Orange
White/Blue
Blue
White/Brown
Brown

+48 VDC ON PINS 1, 3, 5, AND 7

RETURN ON PINS 2, 4, 6, AND 8

PIN

PIN

8

1

16180-A

© 2002, ADC Telecommunications, Inc.

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ADCP-75-136 • Issue 1 • November 2002

5.

Connect the DC power cable to the DHU port 1 DC PWR jack as shown in Figure 21.

6.

Place the DC power cable within the cable guides provided (see Figure 21) and then
dress and secure the cable at the DHU per standard industry practice.

RJ-45 CONNECTOR

DETAIL

1

8

CONNECTOR

Figure 21. 48 Vdc Power Cable Connection

7.

Connect the DC power cable to the DRU as specified in the instructions provided with
that unit.

8.

Repeat steps 1–7 for each remaining DRU that will be powered by the DHU.

4.10 External Alarm System Connections

The alarm interface between the DHU and an external alarm system is supported by a six­terminal plug (with screw-type terminals) that connects to a receptacle mounted on the DHU
front panel. The terminal plug provides connections to normally open (NO) and normally
closed (NC) dry type alarm contacts for both minor and major alarms. A category 3 or 5 cable
is typically used to connect the DHU to the external alarm system. Use the following
procedure to install the alarm wiring and connect it to the DHU:

RJ-45

PORT 1

DC POWER

CONNECTOR

CABLE GUIDE

DETAIL

17275-A

CABLE

GUIDES

1.

Obtain the required length of category 3 or 5 cable.

2.

Route the cable between the DHU and the external alarm system (if not already routed)
and then cut to required length. Allow sufficient slack for dressing and organizing the
cable at the DHU.

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© 2002, ADC Telecommunications, Inc.

ADCP-75-136 • Issue 1 • November 2002

3.

Strip back the outer cable sheath and insulation to expose the wires at both ends of the
cable and strip back 0.2 inches (5 mm) of insulation each wire.

4.

Connect the Major alarm wire pair to the MAJOR COM/NC or MAJOR COM/NO
terminals (whichever is required by the external alarm system) on the DHU alarm
terminal connector (supplied with DHU) as shown in Figure 22.

ALARM

CONNECTOR

RECEPTACLE

ALARM

CONNECTOR

MINOR

ALARM

WIRES

MAJOR
ALARM

WIRES

NO

MINOR

NC

COM

NO

ALARM CONNECTOR

COM

MAJOR

DETAIL

NC

17278-A

Figure 22. External Alarm System Connections

5.

Connect the Minor alarm wire pair to the MINOR COM/NC or MINOR COM/NO
terminals (whichever is required by the external alarm system) on the DHU alarm
terminal connector as shown in Figure 22.

6.

Insert the alarm terminal connector into the receptacle on the DHU front panel.

7.

Connect the Major and Minor alarm wire pairs to the appropriate terminals on the
external alarm system.

8.

Dress and secure cable per standard industry practice.

4.11 AC Power Connections

The AC power interface between the DHU and the AC power source is supported by a 3-wire
AC power cord connector located on the DHU front panel. The AC connector provides a
connection point for the power cord which is provided separately with the DHU. Use the
following procedure to install the AC power cord:

© 2002, ADC Telecommunications, Inc.

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ADCP-75-136 • Issue 1 • November 2002

1.

Locate the AC power cord which is provided separately with the DHU. Use only the AC
power cord provided with the DHU or an equivalent UL/CUL listed 3-conductor, 18
AWG cord terminated in a molded-on plug cap rated 125 V, 15 A with a maximum
length of 6 feet (1.8 m).

Note: The DHU is intended to be used with a 3-wire grounding type plug which has a
grounding pin. Equipment grounding is required to ensure safe operation. Do not defeat
the grounding means. Verify DHU is reliably grounded when installed.

2.

Place the DHU AC power ON/OFF switch, shown in Figure 23, in the OFF position
(press O).

3.

Connect the receptacle end of the power cord to the AC connector on the DHU.

4.

Route the plug end of the power cord to the specified AC outlet (per the system design)
and connect plug to outlet.

Warning: The current rating of the DHU is 2.0 Amps at 120 Vac. Avoid overloading circuits
which may cause damage to over-current protection devices and supply wiring.

5.

Dress and secure cable per standard industry practice.

6.

When all units of the Digivance ICS have been installed, refer to Section 4 of this
manual for the system power up and test procedures.

4.12 Create As-Built Drawing

Following installation, create an “as-built” drawing of the complete Digivance ICS system.
Using a drawing of the building floor plan, show the installed location of each piece of
equipment including the various Digivance electronic units, the antennas, the interface units,
and the microcell (if used). In addition, show the location and routing of all copper, coaxial,
and fiber optic cable runs used with the system. Retain the as-built drawing for reference when
troubleshooting or when planning for system expansion.

17276-A

AC POWER CORD

Figure 23. AC Power Connection

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© 2002, ADC Telecommunications, Inc.