General DataComm Metroplex 6000 MP 6960 Owner's manual

Installation and Operation
Metroplex™- 6000
GDC 086R601-001
Issue 1, June 1996
General DataComm
Wallmount Enclosure
Model MP 6960

Wallmount Enclosure (MP 6960)............................................................................................. 1-2
Unpacking ................................................................................................................................ 1-3
Cooling Requirements.............................................................................................................. 1-3
Location.................................................................................................................................... 1-3
Rear Panel Connections ........................................................................................................... 1-5
Grounding for Safety and EMC ........................................................................................ 1-6
Chassis Grounding Post .................................................................................................... 1-6
Signal Ground ................................................................................................................... 1-6
E&M Ground .................................................................................................................... 1-6
Ground Start Ground ........................................................................................................ 1-6
Power Supply Redundancy ............................................................................................... 1-7
Power Line......................................................................................................................... 1-7
Internal Power Supply Replacement........................................................................................ 1-8
Installing The Connector Retaining Plates (GDC Kit No. 010K027-001)...............................1-8
Installing The Cards ................................................................................................................. 1-8
Specifications and Parts List .................................................................................................. 1-10
Wallmount Enclosure

1-2 Wallmount Enclosure
GDC 086R601-001
Wallmount Enclosure (MP6960)
This manual describes the 6-slot Wallmount Enclosure. This unit measures approximately 14
inches high, 14 inches wide and 7.5 inches deep. All cabling is done via front panel mounted
connectors. The cards are connected internally through a backplane, which is also the distribution
point for the enclosures built-in power supply. See Figure 1-1. It features:
• 6-slots for system cards and blank fillers
• Wallmounted or optionally rackmounted with the optional rackmounting kit
• Internal 60 watt AC power supply
• Optional external AC power supply to provide power supply redundancy
• Can be powered from -48 VDC source
• Allows various grounding options for installation flexibility
• UL listed
• Universal AC input 90-240VAC, 50-60 Hz
Figure 1-1 Wallmount Enclosure
Flat
Surface
Remove from carton and place as shown on flat surface. Do not stand up-right.

Wallmount Enclosure 1-3
GDC 086R601-001
Unpacking
Inspect for damage; if any is observed, notify the shipper immediately. Save the box and packing
material; you can use it to reship the unit, if necessary. Remove the enclosure from the shipping
carton and place on a flat surface as shown in Figure 1-1. Do not place unit in an upright position.
Contents of package:
6-slot Wallmount Enclosure
Wallplate and hardware
Power Cord
Cables
Cooling Requirements
We recommend that you mount the enclosure in an area of unrestricted air flow. Do not block the
top, bottom, or sides. There must be adequate provision for the circulation of cooling air and
exhaust of warm air. The ambient temperature should not exceed 122°F (50°C). Do not install the
enclosure directly above equipment that generates a large amount of heat (such as power
supplies).
Location
The unit requires about 15 inches in the front of the unit so you can install and extract the cards
easily and install cables. Also you should allow for clearance at the rear of the enclosure to
accommodate connections at the back. The location for the optional external power supply which
provides redundancy should also be taken into consideration.
The unit should be installed where it can be easily connected to the T1 line, voice and data cabling
and a power source. A wall mounted flat plywood panel no less than 5/16" thick should be
provided. See Figure 1-2, and follow the steps below, to install the enclosure.

1-4 Wallmount Enclosure
GDC 086R601-001
Figure 1-2 Installation of Wallmount Enclosure
Figure 1-2 Installation of Wallmount Enclosure (Cont.)
SIDE COVER
INSERT
Plywood Mounting Surface
CARDS
GeneralDataComm,Inc.
Rear Bezel
Top Vent
Bottom Vent
Front View
Wallmount Plate Tabs
Keyhole Slots
Chassis
Plate
Side View
Mounting Holes

Wallmount Enclosure 1-5
GDC 086R601-001
1. Locate the wallmount plate on the plywood panel and level the plate.
2. Mark the position of the two keyhole slots and the two mounting holes.
3. Using the wood screws provided, screw two into panel at the keyhole positions leaving
about 1/4" protruding. The holes located at the bottom of the wallmount plate are used for
additional securing. Tighten all four screws.
4. The enclosure can now be attached to the wallmount plate by aligning the chassis plate slots
with the wallmount plate tabs and moving the enclosure to the right and down.
Rear Panel Connections
The following paragraphs describe the rear panel connections to the Wallmount Enclosure. See
Figure 1-3.
Figure 1-3 Rear Panel Connections
All line interface and voice and data channel cabling is made directly to connectors on each cards
front panel. However, some power and ground connections are made on the rear panel. Behind
the rear bezel are two terminal blocks. Terminal block 1 (TB1) is a four-position block and is not
used. Terminal block 2 (TB2) is a six-position block that is used for ground connections and for
external power input.
IEC 320 AC Power Input
Terminal Block
(under cover)
Chassis Grounding Post

1-6 Wallmount Enclosure
GDC 086R601-001
Grounding for Safety and EMC
When AC powered, the enclosure must be connected to protective (earth) ground for safety
reasons. This is normally done via the power cord’s ground wire, or optionally via a separate
ground wire from a grounding post (chassis ground) on the rear panel.
Electromagnetic Compatibility (EMC) is maximized with the use of shielded cables for data
circuits. These shielded cables are connected to the chassis and thus to local earth ground. This
occasionally causes a problem if the equipment to which the unit is connected is at a different
ground potential than the unit.
A large ground current can flow in the shield of a shielded cable if it is connected to ground at
both ends, and the grounds at the two equipments are not at the same potential. To avoid large
currents, make sure that a potential difference of less than 0.25 V RMS exists between the ground
of the unit and the ground of the equipment to which it is connected. An alternative is to break
the shield continuity in the middle of a long cable run, or to connect the shield to ground at only
one end.
It is common practice to tie chassis ground and signal ground together. Signal ground is the 0V
reference for the digital circuits in the unit, and is also the reference for unbalanced data interfaces
such as EIA/TIA-232-E and RS423. Tying these grounds together is usually best for AC power
line noise immunity, but a problem can exist if signal grounds on two equipments (at different
chassis ground potentials) are connected together via a data cable. A large current can flow in the
signal ground lead (EIA/TIA-232-E pin 7). To prevent this, make sure the potential difference
between grounds is less that 0.25 V RMS.
Chassis Grounding Post
The enclosure chassis is normally grounded through the ground lead of the IEC 320 AC
input receptacle. In addition, the chassis may be grounded by connecting a 16 AWG
minimum wire from the chassis grounding post, marked by the symbol located as shown
in Figure 1-3. This wire should be connected to the Building Telecommunications Ground.
Signal Ground
Signal ground andChassis Ground may be tiedtogether by wiring between the two terminal block
positions labeled SIG GND and CH GND. The unit is shipped with these two grounds connected
by a jumper. If required, this jumper may be removed to isolate the grounds.
E&M Ground
If you are using voice channels with Type I or Type V E&M signaling, the rear panel terminal
block position labeled E&M GND must be connected to the signaling ground of the switching
equipment (PBX). This ground connection is only used with E&M signaling types I and V.
The unit is shipped with a jumper that connects E&M GND to Chassis Ground. If the Metroplex
6000 Chassis Grounding Post is connected to the switching equipment’s ground, this is sufficient
toprovidethe returnpath.Otherwise,removethisjumperandconnecta wirefromthe E&M GND
position directly to the switching equipment ground.

Wallmount Enclosure 1-7
GDC 086R601-001
Ground Start Ground
For OB (FXS) voice circuits that use ground start signaling, an explicit ground connection must
be made between the Metroplex 6000 and the switching equipment (PBX). Ground start FXS
works by connecting the Ring lead of the telephone circuit to earth ground causing current to flow
in the Ring lead but not in the Tip lead. On the Metroplex 6000, OB voice channels configured
for ground start FXS connect the positive pole of the battery to the rear panel terminal block
position labeled GS GND. This position must be connected to the switching equipment (PBX)
common ground. By default, it is shorted to chassis ground.
Power Supply Redundancy
The Metroplex 6000 Wallmount Enclosure contains an internal AC input power supply which
provides a regulated 24 VDC supply to the cards in the enclosure. To provide for power supply
redundancy, an optional external source of 24 VDC may be connected to terminal block TB2
labeled EXT. POWER. The recommended power source is International Power Sources, Inc.
Model No. PUP110-14.
Connect the black (negative) wire to the terminal labeled -BATT and the red (positive) wire to
the terminal labeled +BATT.
If the Metroplex 6000 internal power supply fails, this external power supply may be used to
provide power without interruption. A power supply alarm message is displayed on the local
manager VT-100 screen as
INT. P.S. FAIL
Similarly, if the external supply fails or is disconnected, an alarm message
EXT. P.S. FAIL
appears, and the internal supply continues to supply power. Both power supplies feed the cards
through two diodes located on the unit backplane.
Power Line
The line cord is terminated in a IEC 320 plug. Connect this plug to the IEC receptacle located on
the rear of the unit.
Connect the line cord to a grounded AC power outlet. The outlet should not be under switch
control.
If you are unsure of the ac receptacle ground return, a separate groundwire can be run to a suitable
grounding point. Figure 1-3 shows the ac grounding standoff located at the rear of the enclosure.
The wire used for this ground must be a minimum of 16 AWG and long enough to connect from
the chassis grounding post labeled GND to the ground point without any splicing.
Do not secure the power cord to any building surface.
NOTE

1-8 Wallmount Enclosure
GDC 086R601-001
Internal Power Supply Replacement
Installing The Connector Retaining Plates (GDC Kit No. 010K027-001)
The Flexi-Voice Plus card GDC No. 086P040-001) and Flexi-Data card (GDC Part No. 086P070-
000) uses 50-pin Amphenol cables that mate with the associated front panel connectors. A
retaining plate has to be attached to the cable connector housing to prevent the cable from coming
loose once it is attached to the front panel connector. The retaining plate and hardware are
included in the small cloth bag shipped with your Wallmount Enclosure. Ten retaining plates and
ten 4-40 screws are provided.
Using the 4-40 screw included in the kit, attach the retaining plate at the bottom of the 50-pin
cable connector housing as shown in Figure 1-4. The mating clips are already attached to the
cards front panel.
Figure 1-4 Attaching the 50-Pin Connector
Installing The Cards
Connect an antistatic wriststrap to the jack marked ESD Strap on the rear of the enclosure.
Replacement of the internal power supply should be performed by
qualified service personnel only.
Antistatic Precautions
Electrostatic discharge (ESD) results from the buildup of static electricity and can
cause computer components to fail. Electrostatic discharge occurs when a person
whose body contains a static buildup touches a computer component.
The equipment may contain static-sensitive devices that are easily damaged;
proper handling and grounding is essential. Use ESD precautionary measures
when installing parts or cards and keepthe parts and cards in antistatic packaging
when not in use. If possible, use antistatic floorpads and workbench pads.
When handling components, or when setting switch options, always use an
antistatic wrist strap connected to a grounded equipment frame or chassis. If a
wrist strap is not available, periodically touch an unpainted metal surface on the
equipment. Never use a conductive tool, such as a screwdriver or a paper clip, to
set switches.
Front Panel Connector
Clip
Connector Retaining Plate
Tilt cable with attached connector retaining plate to engage
Push forward to mate with front panel connector.
Front Panel Screw top screw into front panel standoff.
50-pin cable
4-40 Screw
front panel connector clip.

Wallmount Enclosure 1-9
GDC 086R601-001
To install the cards, follow these steps and see Figure 1-5.
1. Position the cards in the top and bottom slot guides with the GDC logo on top, and carefully
slide the card into the slot until it stops at the rear backplane connectors.
2. Push the front panel with both hands until the assembly seats in the rear connector.
3. Secure the card by tightening the front panel screws with a screwdriver.
4. Any card may be placed in any slot, with the exception of the platform card, which must be
placed in slot 1 (the left most slot when looking at the front panels).
Filler Panels
All unused slots must be filled with filler panels to prevent accidental contact with
telecommunication voltages present on the cards.
Figure 1-5 Card Placement in Wallmount Enclosure
Filler Panel

1-10 Wallmount Enclosure
GDC 086R601-001
Specifications and Parts List
The specifications and parts list for the Wallmount Enclosure and associated power cords are
listed in Table 1-1.
Table 1-1 Specifications and Parts List
Specifications
Dimensions
Height
Width
Depth
14.25 in. (362 mm)
14.0 in. (356 mm)
7.5 in. (190 mm)
Weight with cover and internal power supply 20 lbs. (9.07 kg)
Internal Power Supply
Power Input AC 90 to 264 VAC
Power Input DC 24-48 VDC
Voltage Output 24 VDC at 3.3A
Regulation ±2%
Power Output (maximum) 60 W
Safety requirements EN60950
UL1459
CSA #225
Temperature Range
Operating 0° to 50°C ambient
UL Listing
Parts List
Item Part No.
6-Slot Wallmount Enclosure MP6960 010B208-001
Installation Kit:
Mounting Plate 010E208-001
Filler Card 010C023-003
66M Block SYS 326P032
66E Block 338C001-A06
Cables
Power cord, IEC 320, domestic 830-024-003
Power cord, IEC 320, Europe 830-061-002
Power cord, IEC 320, Italy 830-002-008
Power cord, IEC 320, Japan 830-002-009
Power cord, IEC 320, Australia 830-002-010
Power cord, IEC 320, Taiwan 830-002-011
Power cord, IEC 320, U.K. 830-060-102
Power cord, IEC 320, Switzerland 830-061-003