Section 28M-K2Q-BK0-20C
030-101562 Rev. B
R
0505ICRB
3
2.4
Making Ground and Power Connections
2.4.1
Ground.
Ground connections are made to the ground lug
located in the top right-hand corner of the kit plate. This will provide
a common ground for the mounting. All grounding practices apply
that would apply for mounting a single 28MA204AK assembly. For
applications requiring chassis ground to be connected to circuit
ground, an optional green wire strap is provided for installation be-
tween the GND lug and the GND position of the 28MA204AK TB1
power terminal block.
- CAUTION -
Never apply power until all installer connections are made.
2.4.2
Power.
Power connections, if required, are made to the top
of the 28MA204AK mounting. Refer to the enclosed 28MA204AK
mounting practice for appropriate power connections to the mount-
ing.
2.5
Making Facility-Side Wiring Connections
Facility-side wiring connections are made to the top half of the 66-
type terminal block. Refer to Figure 3 and Table 1.
2.6
Making Customer-Side Wiring Connections
Customer connections are typically made to the 66-type block, but
also can be made to the 8-pin RJ48 jacks on the mounting.
S
66-Block.
If extending the RJ48 jack beyond the mounting, use
the bottom half of the 66-block, as shown in Figure 3, and refer
to Table 2 for correct circuit, wire, and terminal designations.
The block is factory pre-wired to four RJ48 pigtails, which are
provided and shipped factory-inserted into the four RJ48 jacks
at the bottom of the mounting
.
The 66 block provides both
RJ48C (for HDSL/NIU applications) and RJ48S (for DDS/
DST) connections. Always insure the jack switches at the
bottom of the mounting are set to the correct position per the
connections to the 66 block for RJ48C or RJ48S applications.
S
RJ48 Jacks.
Customer connections also can be made to the
RJ48 jacks located at the bottom of the mounting, as shown in
Figure 3. This is done by removing the RJ48 pigtails (provided
with the kit and pre-wired to the 66-block) and inserting custom-
er-supplied, separate, RJ48 cable plugs into the jacks. The
mounting also contains a jack switch for each jack, to set the jack
type to either RJ48C (for HDSL/NIU applications) or RJ48S
(for DDS/DST applications). The switches are factory preset to
the C" position. Insure the jack switches (at the bottom of the
mounting) are set to the proper position for the application. See
the mounting practice for details.
2.7
Installing the Plug-in Modules
Consult the module practice when installing modules. Before instal-
ling any module, set any option switches to the desired positions.
Align the module with the mounting card guides above and below
the unit and fully-insert into the slot connector.
CAUTION - STATIC-SENSITIVE
This product and the plug-in product installed inside the assembly
may contain static-sensitive components! Follow proper electrostatic
discharge procedures to maintain personal and equipment safety.
3.
TESTING & TROUBLESHOOTING
The equipment should not be field repaired. If trouble occurs, check
that the CO power fuse is not blown and verify all installer connec-
tions, module connections, option switch settings, and that modules
have a positive connection with the shelf connectors. If trouble per-
sists, replace the suspect unit with another, optioned identically, and
retest. If the replacement operates correctly, the original may be
faulty and can be returned to Westell for repair or replacement
(Paragraph 5.2). These procedures are not designed to effect repairs
or modifications. Tests/repairs beyond those outlined herein or re-
placing a faulty unit are not recommended and may void a warranty.
CIRCUIT
COLOR
4 SLOT MOUNTING
66 BLOCK
white/blue
T
3
1
blue
R
4
white/orange
T1
5
orange
R1
6
white/green
T
9
2
green
R
10
white/brown
T1
11
brown
R1
12
white/blue
T
15
3
blue
R
16
white/orange
T1
17
orange
R1
18
white/green
T
21
4
green
R
22
white/brown
T1
23
brown
R1
24
Table 1. Network-Side Wiring Chart
4 SLOT MOUNTING
CIRCUIT
COLOR
RJ48
PINOUT
RJ48C
HDSL/NIU
RJ48S
DDS/DST
66
BLOCK
white/blue
5
CT
unused
27
blue
4
CR
unused
28
1
white/orange
2
CT1
DTT
29
orange
1
CR1
DTR
30
white/green
8
unused
DRT
31
green
7
unused
DRR
32
white/blue
5
CT
unused
33
blue
4
CR
unused
34
2
white/orange
2
CT1
DTT
35
orange
1
CR1
DTR
36
white/green
8
unused
DRT
37
green
7
unused
DRR
38
white/blue
5
CT
unused
39
blue
4
CR
unused
40
3
white/orange
2
CT1
DTT
41
orange
1
CR1
DTR
42
white/green
8
unused
DRT
43
green
7
unused
DRR
44
white/blue
5
CT
unused
45
blue
4
CR
unused
46
4
white/orange
2
CT1
DTT
47
orange
1
CR1
DTR
48
white/green
8
unused
DRT
49
green
7
unused
DRR
50
Table 2. Customer-Side Wiring Chart
4.
CUSTOMER & TECHNICAL SERVICES
If technical or customer assistance is required, contact Westell via
one of the following options:
Voice: (630) 898-2500
Voice: (800) 323-6883
email:
Visit the Westell internet site at http://
www.Westell.com.
5.
WARRANTY & REPAIRS
5.1
Warranty
. Westell warrants this product to be defect-free
at shipment time and to be fully functional for the time period speci-
