Section DTW-A52-828-201
030-101668 Rev. A
3
0802I1RA
2.1 Pre-Mounting Considerations
This assembly is to be installed by authorized, trained person-
nel only, in accordance with local practices for High Capacity
(1.544 Mb/s) Digital Services, Digital Data Services or Leased
Line Analog Services. In accordance with UL1950, this mount-
ing enclosure is suitable for mounting over concrete or other
non-combustible surfaces only. The assembly should be lo-
cated in an area that provides adequate lighting, climate
control and equipment access.
2.1.1 Important Safety Instructions (Please Save)
When using your telephone/telecommunications equipment,
basic safety instructions should always be followed to reduce
risk of fire, electric shock and injury to person, including the
following:
A. Read and understand all instructions.
B. Follow all warnings and instructions marked on product.
C. Do not place this product on an unstable cart, stand or table: the
product may fall, causing serious damage to product.
D. Slots and openings in the cabinet and the back or bottom are pro-
vided for ventilation. To protect it from overheating, these
openings must not be blocked or covered. This product should nev-
er be placed near or over a radiator or heat register. This product
should not be placed in a built-in installation unless proper ventila-
tion is provided.
E. This product should be operated only from the type of power
source indicated on the marking label.
F. Never push objects of any kind into this product through cabinet
slots as they may touch dangerous voltage points or short out parts
that could result in the risk of fire or electrical shock. Never spill liq-
uid of any kind on the product.
2.1.2 Gathering Tools and Supplies
The following tools and supplies may be needed to mount the as-
sembly.
Flat-blade screw driver (to adjust the terminal block screws
and to adjust the mounting screws and ground lug)
Wire strippers (for signal, power, and ground wires)
Drill and drill bits (to drill holes for mounting screws/bolts)
Wirewrap tool (if using wirewrap pin connections)
Grounding materials and equipment
Wall mounting hardware (four screws or bolts)
2.2 Wall-Mounting the Assembly
The DTWA528-28 is designed to be directly mounted to an ap-
proved wall. Follow local company practice to mount the
assembly; if none exist, follow the instructions below and refer to
Figure 2 and Figure 3 as needed to mount the assembly. The in-
structions assume the CIM is located on the right side of the
assembly.
- CIM LOCATION NOTE -
The CIM module can be removed and attached to either side of
the mounting assembly, and the assembly’s cover can be removed
and reversed to change the swing-out door hinge location.
1. Determine the mounted location on wall. Ensure the as-
sembly will be mounted in a location with unobstructed
access to it and which has adequate room to allow the front
door to be opened, and that adequate horizontal and verti-
cal space be left between multiple installations to allow for
proper cable access and ventilation.
2. Prepare the assembly. Remove the front cover by loosening
the thumbscrews on the sides of the assembly. Also unlock
the keylock, if mounting a key-locking model.
3. Remove the cover. Slide or lift off the cover and set it aside.
4. Separate the mounting backplate from the assembly. Next,
remove the backplate from the assembly by loosening the
thumbscrew at the top center of the assembly’s PCB back-
plane.
5. Determine the mounted location on wall. Ensure the as-
sembly will be mounted in a location with unobstructed
access to it and which has adequate room to allow the
mounting’s front door to be opened, and that adequate hor-
izontal and vertical space be left between multiple
installations to allow for proper cable access and ventila-
tion.
6. Mark the mounting hole locations to be drilled. Using the
removed backplate as a template, lift the backplate to the
exact installation location on and against the approved wall,
per company practice, and then mark the exact mounting
hole locations to be drilled for the mounting hardware.
7. Drill holes. Set aside the backplate and drill appropriately-
sized holes to accommodate the mounting hardware, per
the wall type and per company practice. The size of the
holes and the fastening hardware varies according to the
wall type. Do not make the holes too large.
8. Secure backplate to wall. Lift the backplate, place it against
the wall so the four recessed mounting hole indentations
contact the wall, and install mounting screws or bolts
through each predrilled hole in the backplate and into the
predrilled holes in the wall. Verify the backplate is firm and
snug up against the wall.
9. Attach assembly to backplate on wall. Lift and align the as-
sembly’s four, angled, mounting clips at the back of the
assembly (see Figure 3) with the four angled tabs on the
backplate, then carefully hang the assembly on the tabs.
Tighten the shelf assembly’s captive thumbscrew.
10. Continue with installer connections. Re-install the cover
and close up the assembly after all installer connections are
made, modules are inserted, and testing is complete.
- CAUTION -
Never apply power until all installer connections are made.
