Westell DSAWM-214ALCI2 User manual

Equipment Issue 2
030-101674 Rev. A, March 2008
Section DSA-WM2-140-202
R
ECopyright 2008 Westell, Inc. All rights reserved.
WestellRand 200 MECHANICSRare registered trademarks of Westell, Inc. Page 1 of 12
0803I2RA
DSAWM-214ALCI2 14-Slot Digital Shelf Enclosure
CONTENTS PAGE #
1. GENERAL 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2. FEATURES 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3. INSTALLATION 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4. OPTIONS 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5. TESTING & TROUBLESHOOTING 9. . . . . . . . . . . . . .
6. CUSTOMER & TECHNICAL SERVICES 9. . . . . . . . .
7. WARRANTY & REPAIRS 10. . . . . . . . . . . . . . . . . . . . . .
8. SPECIFICATIONS 12. . . . . . . . . . . . . . . . . . . . . . . . . . . .
1. GENERAL
1.1 Document Purpose
This document describes the Issue 2 DSAWM-214ALC wall-
mount Digital Shelf Enclosure, shown in Figure 1. See Figure 2
for an application and circuit overview. See Table 5 for specific
models and ordering information.
- NOTE -
Hereafter, the DSAWM-214ALC Issue 2 digital shelf enclosure
also may be referred to as the DSAWM-214" or enclosure."
1.2 Document Status
This practice replaces practice number 030-101322 for the
DSAWM-214ALC Issue 2 product. The 030-101322 practice
replaced practice number 057-033700. The Issue 2 equipment
adds the redundant powering capability and complies with
UL1950 requirements. Whenever this practice is updated, the
reason will be stated in this paragraph.
1.3 Product Purpose
The DSAWM-214 enclosure houses up to fourteen 200 ME-
CHANICSR-type (or seven 400-type) plug-in modules which
are designed for use in 1.544 Mb/s Hi-Capacity Digital Services
(HiCap) or High-bit-rate Digital Subscriber Line (HDSL) ap-
plications. Central Office (CO) side connections are made via
wirewrap pins mounted on the plug-in Telco Termination Mod-
ule located at the top of the enclosure or via two 50-pin
Amphenol-type connectors (at the top rear of enclosure). Cus-
tomer side connections are made through either the two
RJ48H D-connectors or through the RJ48C jacks (depending
on the specific model used), all located on the lower part of the
front of the enclosure. To power the modules in the shelf, either
span power, local -48 VDC power, or AC power is used. Local
-48 VDC power is applied to a screw terminal block on the Telc o
Termination Module supplied with the enclosure. An optional
Westell 2555 120 VAC to -48 VDC Power Supply provides local
DC powering.
Figure 1. Isometric View of DSAWM-214 Enclosure
1.4 Product Mounting
The DSAWM-214 enclosure is typically mounted on a wall.
Rack mounting is possible using rack-mount kits (see
Figure 3).
2. FEATURES
The DSAWM-214 offers the following features.
DNEBS certified
DMeets UL 1950/CSA requirements
DWall mounting with removable, rear, wall-mount plate
with two top keyhole slots for easy mounting
DOptional relay rack mounting ears 080-500455
DAccepts local AC or DC powering or span powering
DFeatures 14 positions which can accept either of the fol-
lowing module arrangements:
SUp to 14 high-density, 200 MECHANICSR -type, NIU
modules, plus one power supply module
SUp to seven 400-type NIU/HDSL modules, plus one
power supply module
DCentral Office side (Network/Facility) connections can be
made via either the 6-pin wirewrap connectors on the
plug-in Telco Termination Module installed at the top of

Section DSA-WM2-140-202 030-101674 Rev. A R
20803I2RA
the unit or via the XMT and RCV 25-pair Amphenol-type
male connectors at the rear of the enclosure
DCustomer side connections made via either the two
RJ48H D-connectors or the modular RJ48C jacks, all lo-
cated on the lower front of the enclosure
DRemovable, tinted, front door allows visual monitoring of
module LEDs
DKeyed front door locking mechanism provides security
DStatic wrist-strap jack at front of unit for Electrostatic Dis-
charge (ESD) protection
DTotally grounded enclosure with chassis ground lug at bot-
tom front of enclosure
DTop and bottom heat ventilation and convection holes
DCircuit Assignment Card facilitates easy module identifi-
cation and assignment
DStrategically-placed cable tie-downs for efficient, neat,
cable management
DEnclosure chassis and interior frame all heavy gauge steel
for strength, durability, and longevity
Telco Termination Module (Local DC/GND)
DTerminal Block (TB1) for local DC power and ground con-
nections
DS1 Slide Switch for THRU" or OPEN" for selecting ei-
ther an open or through shield ground from TB1
DFourteen 6-pin wirewrap connectors, J1 through J14 (one
for each slot), at front of Telco Termination Module pro-
vide termination points for CO-side cable wires when
using 200-type cards
DFront panel ALARM LED lights when fuse is blown
DFront panel fuse rated at 2 amps
Optional AC Power Supply
DAccepts optional local AC powering (Westell model 2555)
in the 15th slot
3. INSTALLATION
Installation consists of examining some pre-mounting con-
cerns, physically mounting the enclosure (back plate) on a wall,
making the necessary electrical, power, ground, and signal
cable connections, and installing the DNI or HDSL modules in
the enclosure. The following paragraphs provide detailed in-
structions for performing these procedures.
3.1 Pre-Mounting Considerations
Before installing the enclosure, visually inspect the unit for
damages, follow proper safety and ESD precautions and proce-
dures, evaluate and determine the proper mounting
application, installation personnel, and installation environ-
ment (mechanical, thermal, electrical), and gather the
required mounting tools, mounting hardware, and test equip-
ment.
The DSAWM-214 enclosure should be installed by authorized
trained personnel only. In accordance with UL 1950, this
mounting enclosure is suitable for mounting on concrete or
other noncombustible surfaces only. It is also recommended
that adequate horizontal and vertical space be left between
multiple installations to allow for proper cable access and ven-
tilation. The distance from the cable entry point should be
consistent with local installation practices.
- NOTE -
Visually inspect the equipment for damage at the time of delivery:
if damaged in transit, immediately report the damage to the
transportation company and Westell.
- CAUTION -
- Never install telephone wiring and/or telephone equipment
during a lightning storm.
- Never install telephone jacks in wet locations unless the
jack is specially designed for wet locations.
- Never touch uninsulated telephone wires or terminals
unless the telephone line has been disconnected at the
network interface.
- Always use caution when installing or modifying telephone
equipment.
- All wiring should be done by a certified technician using
only approved telephone wire.
3.1.1 Considering Safety
When using and installing telephone/telecommunications
equipment, basic safety instructions should always be followed
to reduce risk of fire, electric shock, and injury to people and
equipment, including the following:
Important Safety Instructions (Please Save)
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, table or other
unstable surfaces: the product may fall, causing serious damage to
product.
D. Slots and openings in the product are provided for ventilation. To
protect it from overheating, these openings must not be blocked or
covered. This product should never be placed near or over a radia-
tor or heat register. This product should not be placed in a built-in
installation unless proper ventilation 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 product
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.
G. Perform ground connections prior to power connections.
H. Follow and use proper Electrostatic Discharge (ESD) precautions
and procedures.
3.1.2 DC Powering & Heat Release Considerations
T1 NIU modules and HDSL HRU modules in the DSAWM-214
enclosure can be either line/span powered remotely from a Cen-
tral Office (CO) or locally powered via either a Telco Termination
Module (and a -48 VDC power source) or from a plug-in AC
power supply.
3.1.2.1 Line Powering Mode
When these modules are utilized in a line power mode, the -48
V battery should not be connected to the enclosure. The HDSL

Section DSA-WM2-140-202
030-101674 Rev. A
R
3
0803I2RA
47
From LEC* (In)
To LEC* (Out)
From LEC* (In)
To LEC* (Out)
R
DSAWM-214 Enclosure
T
J1 - J14
R1
T1
(RCV)
(XMT)
J15
To CPE (Out)
Figure 2. DSAWM-214 Application and Circuit Overview
DSAWM-214 Enclosure
Facility/Network Interface
DSAWM-214 Enclosure
CPE/Customer Interface
P2
P1
(RCV)
(XMT)
5
15
J1 - J14
Optional DSAWM-214 Application Using 50-Pin Amphenol Connectors and RJ48C Jacks
From CPE (In)
To CPE (Out)
Typical DSAWM-214 Application Using Wirewrap Pins on Telco Termination Module and RJ48H Connector
* LEC = Local Exchange Carrier
* LEC = Local Exchange Carrier
55
49
1
2
5
4
(RCV)
(XMT)
Customer Side
From CPE (In)
Telco
Term.
Module
CO Side
CO Side Customer Side
7
13
41
5
15
55
49
XMT
RCV
Module
T1
R1
T
R
Module
47
7
13
41
CPE RCV
CPE XMT
FAC RCV
FAC XMT
CPE RCV
CPE XMT
FAC RCV
FAC XMT
T1
R1
T
R
R
T
R1
T1
Facility/Network Interface CPE/Customer Interface
DSAWM-214 Enclosure
J16
HRU modules are typically designed to use local power from the
48 V battery if it is available to the shelf. The only connections
to TB1, the power and ground terminal block, in this mode of op-
eration, are the chassis ground (CHASSIS GND) and circuit
ground (CKT GND) connections.
3.1.2.2 Local Powering Mode
When local power mode is selected, TB1 on the Telco Termina-
tion Module provides screw terminals for 48 V battery (-PWR
position) and 48 V return (+PWR position). A separate, fused,
48 V battery feed is required. The total enclosure input current
depends upon the mix, quantity, and size of modules. The
DSAWM-214 can accept up to fourteen 200-type modules or
four 400-type modules. While the specific input current will be
determined from the above particular variables, some typical
conditions are discussed in the following sentences.
3.1.2.3 Current Using 200-MECHANICS Cards
The T1 NIU module operates at a constant current typically
0.06 amps per module. An enclosure equipped with fourteen
200-type NIU modules will require 0.84 amps. This current will
remain virtually constant over the battery range of 42 VDC to
56 VDC. The power dissipation and heat release will vary di-
rectly with the battery voltage.
3.1.2.4 Current Using 400-type Cards
The HDSL HRU module typically operates at constant power,
therefore the input current is larger at the 42 VDC battery
range. A 400-type HRU with 6.5 watts of heat release will re-
quire 0.155 amps per module or 1.1 amps at -42 VDC for seven
modules in an enclosure.
3.1.3 Ventilation
The DSAWM-214 requires a minimum of three inches of open
space immediately above and below the enclosure, and also 1-2

Section DSA-WM2-140-202 030-101674 Rev. A R
40803I2RA
Enclosure
Back Plate
Channel of 19" or
23" Equipment Rack
DSAWM-214
Enclosure
Enclosure can be mounted in racks with either 1" or 1.75" rack unit spacing.
Kit # 080-500455 is designed to mount 214 to rack. First mount kit to mounting , then mount
enclosure to kit mounting plate.
Figure 3. DSAWM-214 Enclosure Mounting Diagram
ÍÍÍÍÍÍÍÍ
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ÍÍÍÍÍÍÍÍ
ÍÍÍÍÍÍÍÍ
ÍÍÍÍÍÍÍÍ
ÍÍÍÍÍÍÍÍ
ÍÍÍÍÍÍÍÍ
ÍÍÍÍÍÍÍÍ
ÍÍÍÍÍÍÍÍ
ÍÍÍÍÍÍÍÍ
ÍÍÍÍÍÍÍÍ
È
È
È
È
È
È
È
È
È
ÈÈÈÈÈÈÈÈ
ÈÈÈÈÈÈÈÈ
ÈÈÈÈÈÈÈÈ
ÈÈÈÈÈÈÈÈ
DSAWM-214
Enclosure
Rack Mounting (Optional)Wall Mounting
The back mounting plate is designed with two top keyhole slots to facilitate mounting.
First install back plate to wall,
then mount enclosure to plate.
Knock-Out Hole for
Optional Cable Access
Figure 3a. Figure 3b.
TB1
Wire
Access
Hole
Cable Access
Holes to
Back Panel
Mounting Ear
inches of open space on each side of the enclosure for proper
ventilation and for cable clearance. If the enclosure is installed
near heat-producing equipment, provisions must be made to
maintain installed module temperatures within their design
specifications.
- NOTE -
The enclosure described in this practice is typically wall-
mounted. Rack mounting in equipment racks is available with
rack-mount kits (Figure 3). See Table 5 for ordering informa-
tion. See Figure 4 for an exploded view of the enclosure.
3.2 Wall Mounting (Typical)
The DSAWM-214 enclosure is typically wall-mounted. The en-
closure has a back panel which serves as a wall-mounting plate
with predrilled mounting holes. When mounting the back
plate, a minimum of #12 up to a maximum of #16 pan-head
type screws with a length of 7/8" to 1" must be used to ensure
stability. Follow the steps below to mount the enclosure on a
wall (also see Figure 3).
1. Remove the back plate from the enclosure by depressing
the black metal push buttons located near the bottom on
each side of the enclosure.
2. Lift and place the back plate on the wall in the desired
mounting location.
3. Mark the four screw hole locations.
4. Set aside the back plate. Drill appropriate pilot holes at
the marked locations before the next step.
5. Partially install the top two screws, leaving approximately
¼-inch protruding for hanging the back panel from the
two keyhole slots provided.
6. Lift the back plate again, align the top keyhole openings
with the two screws and hang back plate on the two pro-
truding screws.
7. Start the two bottom screws and tighten in place. Then
tighten the two top screws in place.
8. Attach the shelf enclosure (hang it) to the mounted back
plate by pressing the two push buttons, positioning the
unit against the back plate, and then releasing the buttons.
To access the plug-in module slots, insert the key in the
front door lock, turn the key and then swing the door open.
3.3 Rack Mounting (Optional)
The DSAWM-214 can be rack mounted in a 19" or 23"
equipment rack with the rack-mount kit # 080-500455.
3.4 Power Connections
The DSAWM-214 can be powered in one of three ways:
DLocal power via an external -48 VDC power source ap-
plied to the barrier-type TB1 screw terminal strip (located
on the Telco Termination Module shipped with and
installed in every enclosure)
DLocal power via the optional 2555 Power Supply module
placed into Slot 15
DVia span power
- CAUTION -
Power applied to TB1 must be wired through conduit. A hole
knock-out is provided on the left side of the enclosure
adjacent to the Telco Termination Module which accepts a
½-inch conduit connector.
3.4.1 -48 VDC Local Power
If local DC power is desired, -48 VDC from an external power
source (battery) can be applied to the enclosure through the

Section DSA-WM2-140-202
030-101674 Rev. A
R
5
0803I2RA
Figure 4. Exploded View of DSAWM-214 Enclosure
Rear Mounting Plate
50-Pin Female Amphenol Cables
(Optional Facility Connections)
Enclosure Chassis
Chassis #6
Ground Lug
Hinged See-Through Front Door
14 Slots for
(or seven 400-Type Cards)
200-Type Cards
Telco Termination Module (DC)
(Provided)
Customer Connections
via RJ48C/H Connectors
Enclosure is shipped full-assembled. This view separates the rear mounting plate and the front door from the enclosure for visual clarity.
Optional Power Supply
(Plugs into Slot 15)
J1 - J14
(6-Pin Wirewrap
Connectors)
for Facility
Connection
2555
Telco Termination Module (Figure 7) shipped with the enclo-
sure and located behind the locking front door in the top,
horizontal module slot. A 6-position screw terminal strip
(TB1) on this Telco Termination Module provides termination
points for -PWRB, -PWRA, +PWRA, +PWRB/CKT GND,
CHASSIS GND and SHIELD GND. Wire access to TB1 is
gained through a hole in the right side wall near the front door
or through a ½" knock-out hole in the left side wall of the enclo-
sure. Allow enough slack in the wires (approximately 6 to 8
inches) to easily remove and (re)insert the module. It is recom-
mended that spade lugs be used to connect wires to TB1
terminals. Figure 7 shows the TB1 DC power and ground con-
nection locations. Power and return ground connections can be
made with stripped wire or spade lug connectors. The TB1
screw position -PWR" provides a connection point to -48
VDC input power. The TB1 screw position +PWR" provides
a connection point for -48 V return or ground and connects to
pin #17 of all slots. Under normal conditions, each terminal
will draw less than 0.6 A steady state current. CKT GND and
CHASSIS GND should be run to a ground buss over separate
wires. CKT GND is internally connected to +PWR on the Tel-
co Termination Module.
3.4.1.1 Power/Fuse Alarm
When using -48 VDC external power, the red LED on the Te l co
Termination Module will light if the 2-amp main enclosure fuse
(F1 on Telco Termination Module) is blown. Each DNI/HDSL
module also provides a front panel alarm LED to indicate the
status of each module’s fusing protection.
- CAUTION -
Do not energize or supply power through the plug-in power
module until the entire installation is complete.
3.4.2 AC Local Power
If local AC power is desired, the optional 2555 Power Supply
module is used and installed in Slot 15 of the enclosure. Be sure
to connect the GRN/YEL ground wire on the 2555 to the chas-
sis ground screw located in the center of the enclosure’s rear
back panel, labelled POWER SUPPLY CHASSIS
GROUND".

Section DSA-WM2-140-202 030-101674 Rev. A R
60803I2RA
Figure 5. Close-Up of Connector Types
Pin 4 (R)
Typical RJ48C Jack
Pin 1 (R1)
Pin 2 (T1)
Pin 5 (T)
1
2
3
4
5
6
7
8
Front Rear
Amphenol-type 50-pin Male
RCV and XMT Connector
Pin 50 Pin 26
Pin 25 Pin 1
RJ48H
J1 Through J14
J15
Customer Side Connections
CO Side Connections
Pin 50
Pin 26
Pin 25
Pin 1
Customer Side Connections
(Female)
Cable Output Direction
Cable Output Direction
J16
- GROUNDING CAUTION -
Always follow local safety precautions and standard operat-
ing procedures for grounding the equipment when instal-
ling, upgrading, repairing or maintaining equipment. Any
instructions or information contained herein is subordinate
to local codes, operating procedures or practices.
3.5 Grounding
When properly installed, the DSAWM-214 enclosure is a total-
ly grounded system at the installation site. The enclosure
provides points for chassis/frame, circuit ground, cable shield
ground, and a static ground.
3.5.1 Chassis/Frame Ground Connections
Chassis ground prevents voltage from building up on the sur-
face of the equipment. The enclosure chassis must be
connected to an earth ground at all times in order to properly
ground the enclosure’s metal framework and all module front
panels. A separate ground conductor/wire is recommended for
chassis/frame ground (separate from the circuit ground). One
end of this conductor/wire must be connected to the enclo-
sure’s external ground lug (located near the front of the unit
under the module housing, as shown in Figure 6) and the other
end must be wired directly into the multi-ground neutral of the
building ground. A shorting bar is provided (but not factory-
installed) for optional installation between the CHASSIS
GND and CKT GND terminals on TB1, for applications re-
quiring chassis ground to be connected to circuit ground.
3.5.2 Circuit Ground Connections for Local DC Power
Circuit ground provides a lightning return path and is recom-
mended to be directly and separately connected to earth
ground regardless of the power source or type (local or span).
Circuit ground must be connected to position CKT GND of
TB1 on the Telco Termination Module for proper operation of
the secondary lightning protection and for proper operation of
the modules plugged into the enclosure. This ground connec-
tion should be made via a separate conductor to the
multi-ground neutral of the building ground.
Position Label Function
1 SHIELD
GND
Provides a ground connection point to the
incoming shield wires connected in pin 1 of the
Wirewrap Interface Card.
2 CHASSIS
GND
Provides a ground connection point for the metal
enclosure and DNI front panels.
3 +PWRB/
CKT GND
Provides a connection point for battery return and
connects to pin 17 of all slots. This terminal must
be connected to EARTH to maintain
lightning/overvoltage protection.
4 +PWRA Provides a connection point for battery return and
connects to pin 17 of all slots. For back-up power
supply.
5 -PWRA Provides connection point for -48V battery for
back-up power supply.
6 -PWRB Provides connection point for -48V battery.
Table 1. TB1 Connections
3.5.3 Local AC Powering Ground Connections
When local AC is used with the 2555 Power Supply, the GRN/
YEL ground wire on the 2555 may be connected to the
enclosure’s chassis ground screw labelled POWER SUPPLY
CHASSIS GROUND" located in the center of the enclosure’s
rear back panel. This gives the customer an alternate means of
utilizing the outlet ground through the power supply cord.

Section DSA-WM2-140-202
030-101674 Rev. A
R
7
0803I2RA
Figure 6. Front View of Enclosure (Door Removed)
Static Wrist-Strap Jack
J1 J3 J5 J7
J2 J4 J6
J16 RCV FROM CUST.
CUSTOMER INTERFACE
Card
Guides
RJ48C
Jacks
50-Pin
Amphenol
Female
Connector
Ground Lug
Telco
Termination
Module
200 MECHANICS
or
Card Slots
400-Type
(Plus one
Access Hole
Card
Guides
Card
Edge
Connector
J1 - J14
in PCB
for AC
Empty
for
External
Grounding
RJ48H
Fourteen
Seven
Knock-Out
for TB1
Connections
Power Supply
Ground
Connections
J9 J11 J13
J10 J12 J14
J8
J15 XMT TO CUST.
Power Supply
Slot
Slot 15 for
MPS2555I2
r
Route this GRN/YEL wire through the square hole in the back
panel at the rear of the top, horizontal slot provided for this
plug-in module, then connect it to the chassis ground screw on
the back panel.
3.5.4 Local DC Powering Ground Connections
When local DC is used with an external power source and the
Telco Termination Module, the circuit, chassis and shield
ground connections are made to TB1 on the Telco Termination
Module. Figure 7 shows the TB1 ground connection locations.
Return ground connections can be made with stripped wire or
by spade lug connectors. TB1 screw position +PWR" is the
battery return. TB1 screw position CKT GND" provides cir-
cuit ground as described in Paragraph 3.5.2. TB1 screw position
CHASSIS GND" termination should be made via a separate
conductor to the multi-ground neutral of the building ground.
TB1 screw position SHIELD GND" provides for a shield
ground as stated in Paragraph 3.5.5.
Under normal conditions, each terminal will draw less than 1-¾
A steady state current. CKT GND should be run to a ground
buss over a separate wire.
- CAUTION -
Power applied to TB1 must be wired through conduit. A hole
knock-out is provided on the left side of the enclosure
adjacent to the Telco Termination Module which accepts a
½-inch conduit connector.
3.5.5 Drain Wire Connections/Shield Ground
If the end user requires a shield ground for inside wiring, a
separate connection to the multi-ground neutral of the build-
ing ground is needed to ensure proper noise suppression on the
data lines. The SHIELD GND screw position on TB1 provides
an earth ground connection point to ground all cable pair
shields connected to the Telco Termination Module.
3.5.6 Static Wrist Strap Jack
The static wrist strap jack, located at the top front of the enclo-
sure, is also grounded to the enclosure chassis/frame. Always

Section DSA-WM2-140-202 030-101674 Rev. A R
80803I2RA
Figure 7. Included Telco Termination Module for Local DC Powering & Network/Facility (CO Side) Wirewrapping
Top
View
Front
View
POS 1
P4P3P2
- PWRA
+ PWRA
+PWRB/CKT GND
CHASSIS GND
SHIELD GND
TB1
THRU OPEN
S1
LD1
ON
1
SGND
NC
R1
T1
R
T
SGND
NC
R1
T1
R
T
SGND
NC
R1
T1
R
T
SGND
NC
R1
T1
R
T
SGND
NC
R1
T1
R
T
SGND
NC
R1
T1
R
T
SGND
NC
R1
T1
R
T
SGND
NC
R1
T1
R
T
SGND
NC
R1
T1
R
T
SGND
NC
R1
T1
R
T
SGND
NC
R1
T1
R
T
SGND
NC
R1
T1
R
T
SGND
NC
R1
T1
R
T
SGND
NC
R1
T1
R
T
POS 2 POS 3 POS 4 POS 5 POS 6 POS 7 POS 8 POS 9 POS 10 POS 11
POS 12
POS 13 POS 14
1
2
P6
1
2
P3 1
2
P1
2 AMPALARM
1
6
- PWRB
Pin 1
Pin 6
use this jack when working with plug-in modules to prevent
electrostatic discharge damage to static-sensitive modules.
3.6 Central Office (CO) Side Connections
CO side connections can be made in one of two ways. One way
is through the wirewrap pins inside the enclosure on the Telco
Termination Module (J1 through J14 on the module) and
another way is by two 25-pair Amphenol cable connectors at
the rear of the enclosure. Either method limits customer access
to these connections, with the wirewrap pin method being the
most secure (requires a key for access).
3.6.1 J1 - J14 Connector Wirewrap Pins
CO side (network/facility) connections are typically made to J1
through J14, the wirewrap connector pins on the Telco Ter-
mination Module shipped with every enclosure and installed
behind the locked front door in the top slot of the enclosure.
E a c h Te l c o Te r m i n a t i o n M o d u l e has 14 J-connectors, one for
each DNI/ HDSL module slot in the enclosure (see Figure 7).
Each of the 14 J-connectors has six wirewrap pins; one pin is not
used (NC) and five are labelled R1, T1, R, T, and SGND.
Table 2 lists the connections that can be made by wirewrapping
the appropriate leads from the network to the proper pins of
each connector. Connections should be made using twisted
shielded pair cable of a gauge consistent with local installation
practices.
3.6.2 25-Pair Male Amphenol Connectors
An alternate method of making CO side (network/facility) con-
nections is through the high-density, 25-pair, male, Amphenol
connectors, XMT and RCV, at the rear of enclosure on the en-
closure back panel. Network transmit and receive signals are in
separate connectors, labelled XMT and RCV. By ordering list
option S", two 15-foot long, female-to-stub-ended Amphenol
cables will be shipped with the enclosure.

Section DSA-WM2-140-202
030-101674 Rev. A
R
9
0803I2RA
Figure 8. Optional 2555 Power Supply (Slot 15)
Front View
Optional Power Supply mounts
in Slot 15 of DSAWM-214.
Isometric View
ALM
PWR
2555I2
INPUT
115VAC
OUTPUT
48VDC, 2.0A
ISS.2
3.7 Customer Side/Interface Connections
The versatile DSAWM-214 also offers two ways to make cus-
tomer side/interface connections: through the D-shaped,
25-pair, female RJ48H connectors (J15, J16) or through the 14
modular RJ48C jacks, labelled J1 through J14, located at the
bottom front of the enclosure for easy accessibility. Westell
provides jack inserts/covers for these jacks for protection when
connectors are not in use. Figure 5 and Figure 6 depict the con-
nector types and locations, and Table 3 lists the pin-outs and
pin designations for these connectors.
3.8 Module Installation
After the enclosure is installed and all wiring is complete, the
DNI/HDSL modules can be installed. Slots 1 through 14 of the
enclosure are dedicated 200-type slots. If 400-type modules are
used, the modules are inserted into odd-numbered slots, i.e., 1,
3, 5, 7, 9, 11, and 13. After inserting modules, mark and use the
circuit assignment card provided on the side of the enclosure
for easy future circuit identification. For module optioning,
and testing information, refer to the practice for each individu-
al module.
- CAUTION -
Use care when installing and removing modules - do not force
a unit into place. If a module resists insertion, remove it and
check for debris in or near the connectors and mounting
slots. The module may then be gently re-inserted.
4. OPTIONS
4.1 Telco Termination Module Options
Each DSAWM-214 enclosure is shipped with a Te l c o Te r m i n a -
tion Module (Figure 7) installed in the top horizontal slot. This
module can be used for wirewrap CO side connections and for
local DC powering. Also located on this module is the following
option.
S1 - This 2-position slide switch provides a shield ground from
TB1 connected to pins 7 and 8 of the RJ48C jacks, J1
through J14 with S1 in the THRU" position. The shield
ground wirewrap pins are permanently connected to the
TB1 SHIELD GROUND terminal pin. With S1 in the
OPEN" position, all the modular jack shield ground pins
are floating.
4.2 Enclosure/Model Options
The DSAWM-214 enclosure is a versatile and flexible enclo-
sure. Table 5 lists specific model numbers, options, and
ordering information for each model. Each model offers dif-
ferent features and equipment. Some of these differences are:
DTwo ways to make CO side connections
DTwo ways to make Customer side connections
DThree ways to power the enclosure
DTwo types/sizes of modules housed in the enclosure
DSeveral ways to mount the enclosure
5. TESTING & TROUBLESHOOTING
5.1 Testing
After installation is complete, initial testing consists of per-
forming the procedures indicated in each practice for the
DNI/HDSL modules installed in the enclosure. An end-to-end
test should be performed to verify circuit operation. This pro-
cedure is intended only to ascertain proper span operation and
if problems should occur, to isolate the problems to the most
probable area.
5.2 Troubleshooting
If trouble is encountered, verify all installer connections to the
enclosure and check that the CO power or the enclosure fuse
is not blown. Also verify all module connections and option
switch settings, and verify the modules are making a positive
connection with the enclosure connector. If trouble persists,
replace the suspect unit and repeat procedures outlined. These
procedures are not designed to effect repairs or modifications.
Any tests beyond those outlined herein, or repairs made be-
yond replacing a faulty unit, are not recommended and may
void the warranty.
6. CUSTOMER & TECHNICAL SERVICES
6.1 Customer Service & Technical Assistance
If technical or customer assistance is required, contact Westell
by calling or using one of the following options:

Section DSA-WM2-140-202 030-101674 Rev. A R
10 0803I2RA
Typical Slot
2
Figure 9. DSAWM-214 Functional Diagram
Connector Pins
5556
49
47
41
35
27
17
15
13
7
5
1
-48 V
XMT
R1
T1
1
26
R
T
1
26
See Table 3
See Table 3
CKT
Chassis
Ground
GND
(male)*
(male)*
Facility
Facility
(Rear View)
8NC
NC
NC
NC
3
7
6
RJ48C Jack
J1- J14
1
2
5
4
1
2
5
4
(Female)
See Table 5
T
R
T1
R1
26 1
2550
14
39
39
14
5
15
T1
R1
RJ48H
(female)
J15
55
49
15
5
-PWR A
+PWR A
+PWR B / CKT GND
CHASSIS GND
SHIELD GND
SHIELD GND
CHASSIS GND
CKT GND
F1 (2 Amp)
-48 V
ALARM
J1 - J7
Wirewrap Pins
Telco Termination Module
SGND
R1
R
T
47
41
RCV
13
7
TO
S1
P
E
N
H
R
U
SHIELD
GND
(IN)
(OUT)
* Amphenol
TB1
Zero Ohm Resistor
11
T1
-PWR B
D1
D2
26 1
2550
1
26
39
14
55
49
T
R
J16
Voice: [phone]
email: [email protected]
For additional information about Westell, visit the Westell
World Wide Web site at http://www.Westell.com.
6.2 Part Numbers
This equipment is identified by a product number and an issue
number. Each time a change is made to the product which
changes the form, fit, or function of the product, the issue num-
ber is incremented or advanced by one. Be sure to indicate the
issue as well as the model number when making inquiries about
the equipment.
7. WARRANTY & REPAIRS
7.1 Warranty
Westell warrants this product to be free of defects at the time
of shipment. Westell also warrants this product to be fully func-
tional for the time period specified by the terms and conditions
governing the sale of the product. Any attempt to repair or
modify the equipment by anyone other than an authorized
Westell representative will void the warranty.

Section DSA-WM2-140-202
030-101674 Rev. A
R
11
0803I2RA
Slot
#
Lead
Diti
56-Pin DNI
Ct
Interface Card
Wirewrap Connector
Amphenol Connect-
ors, List S Colors Slot
#
Lead
Diti
56-Pin DNI
Ct
Interface Card
Wirewrap Connector
Amphenol
Connectors
# Description Connector
Pin # Connector
Label/Position
Pin
#
XMT
Cable/
Connector
RCV
Cable/
Connector
# Description Connector
Pin # Connector
Label/Position
Pin
#
XMT
Cable/
Connector
RCV
Cable/
Connector
1R1 47 POS 1 3BL / W 8R1 47 POS 8 3G / R
T1 41 4 W / BL T1 41 4 R / G
SGND 1 SGND 1
NC 2 NC 2
R 13 5 BL / W R 13 5 G / R
T 7 6 W / BL T 7 6 R / G
2R1 47 POS 2 3O / W 9R1 47 POS 9 3BR / R
T1 41 4 W / O T1 41 4 R / BR
SGND 1 SGND 1
NC 2 NC 2
R 13 5 O / W R 13 5 BR / R
T 7 6 W / O T 7 6 R / BR
3R1 47 POS 3 3G / W 10 R1 47 POS 10 3S / R
T1 41 4 W / G T1 41 4 R / S
SGND 1 SGND 1
NC 2 NC 2
R 13 5 G / W R 13 5 S / R
T 7 6 W / G T 7 6 R / S
4R1 47 POS 4 3BR / W 11 R1 47 POS 11 3BL / BK
T1 41 4 W / BR T1 41 4 BK / BL
SGND 1 SGND 1
NC 2 NC 2
R 13 5 BR / W R 13 5 BL / BK
T 7 6 W / BR T 7 6 BK / BL
5R1 47 POS 5 3S / W 12 R1 47 POS 12 3O / BK
T1 41 4 W / S T1 41 4 BK / O
SGND 1 SGND 1
NC 2 NC 2
R 13 5 S / W R 13 5 O / BK
T 7 6 W / S T 7 6 BK / O
6R1 47 POS 6 3BL / R 13 R1 47 POS 13 3G / BK
T1 41 4 R / BL T1 41 4 BK / G
SGND 1 SGND 1
NC 2 NC 2
R 13 5 BL / R R 13 5 G / BK
T 7 6 R / BL T 7 6 BK / G
7R1 47 POS 7 3O / R 14 R1 47 POS 14 3BR / BK
T1 41 4 R / O T1 41 4 BK / BR
SGND 1 SGND 1
NC 2 NC 2
R 13 5 O / R R 13 5 BR / BK
T 7 6 R / O T 7 6 BK / BR
Table 2. Network Interface Connections

Section DSA-WM2-140-202 030-101674 Rev. A R
12 0803I2RA
Sl t
Diti
56-Pin
DNI
RJ48 Connector
Slot
#
Description DNI
Connector RJ48C
Label - Pin #
RJ48H
Label - Pin #
1R1 15 J1 - 1 J15 - 1
T1 5 J1 - 2 J15 - 26
R 49 J1 - 4 J16 - 1
T 55 J1 - 5 J16 - 26
2R1 15 J2 - 1 J15 - 2
T1 5 J2 - 2 J15 - 27
R 49 J2 - 4 J16 - 2
T 55 J2 - 5 J16 - 27
3R1 15 J3 - 1 J15 - 3
T1 5 J3 - 2 J15 - 28
R 49 J3 - 4 J16 - 3
T 55 J3 - 5 J16 - 28
4R1 15 J4 - 1 J15 - 4
T1 5 J4 - 2 J15 - 29
R 49 J4 - 4 J16 - 4
T 55 J4 - 5 J16 - 29
5R1 15 J5 - 1 J15 - 5
T1 5 J5 - 2 J15 - 30
R 49 J5 - 4 J16 - 5
T 55 J5 - 5 J16 - 30
6R1 15 J6 - 1 J15 - 6
T1 5 J6 - 2 J15 - 31
R 49 J6 - 4 J16 - 6
T 55 J6 - 5 J16 - 31
7R1 15 J7 - 1 J15 - 7
T1 5 J7 - 2 J15 - 32
R 49 J7 - 4 J16 - 7
T 55 J7 - 5 J16 - 32
8R1 15 J8 - 1 J15 - 8
T1 5 J8 - 2 J15 - 33
R 49 J8 - 4 J16 - 8
T 55 J8 - 5 J16 - 33
9R1 15 J9 - 1 J15 - 9
T1 5 J9 - 2 J15 - 34
R 49 J9 - 4 J16 - 9
T 55 J9 - 5 J16 - 34
10 R1 15 J10 - 1 J15 - 10
T1 5 J10 - 2 J15 - 35
R 49 J10 - 4 J16 - 10
T 55 J10 - 5 J16 - 35
11 R1 15 J11 - 1 J15 - 11
T1 5 J11 - 2 J15 - 36
R 49 J11 - 4 J16 - 11
T 55 J11 - 5 J16 - 36
12 R1 15 J12 - 1 J15 - 12
T1 5 J12 - 2 J15 - 37
R 49 J12 - 4 J16 - 12
T 55 J12 - 5 J16 - 37
13 R1 15 J13 - 1 J15 - 13
T1 5 J13 - 2 J15 - 38
R 49 J13 - 4 J16 - 13
T 55 J13 - 5 J16 - 38
14 R1 15 J14 - 1 J15 - 14
T1 5 J14 - 2 J15 - 39
R 49 J14 - 4 J16 - 14
T 55 J14 - 5 J16 - 39
Table 3. Customer Interface Connections
7.2 Repair and Return
Westell will repair or replace any defective Westell equipment
without cost during the warranty period if the unit is defective
for any reason other than abuse, improper use, or improper
installation. To return defective equipment, first request a Re-
turn Material Authorization (RMA) number from Westell by
calling or using one of the options shown below. Once an RMA
number is obtained, return the defective unit (freight prepaid),
along with a brief problem description, to the address we will
provide to you when you contact us.
Voice: [phone]
email: [email protected]
Replacements are shipped in the fastest manner consistent
with the situation urgency. Westell continues to repair/replace
faulty equipment beyond the warranty period for a nominal
charge.
8. SPECIFICATIONS
The electrical and physical specifications are shown in Table 4.
To order units, call the number shown in Paragraph 6.1 and spec-
ify the enclosure ordering information shown in Table 5.
Feature U.S. Metric
Height 12.6 in. 32 cm
Width 12.0 in. 30.5 cm
Depth 8.8 in. 22.4 cm
Weight (approx.) 20 lb. 9 Kg
Indoor Operating Temp. 0°to 122°F -18°to +50°C
Outdoor Operating Temp. -40°to 149°F -40°to +65°C
Humidity 0 to 95% (non-condensing)
Ventilation Refer to Paragraph 3.1.3.
Input Power Local Power. -42 to -56 VDC fused at 2 Amp, span
line power, or optional power supply, model 2555
Issue 2, 115 VAC input, -48 VDC 2.0 A output.
CI Provisioning 14 RJ C" or 2 H" jacks.
Table 4. Physical Specifications
Part Number Description
DSAWM-214ALCI2
CLEI* Code:
NCMD9YP3RA.
Barcode: 431784
14-circuit, digital wall-mount enclosure, locking front
door, Telco Termination module, Network connections
via wirewrap pins or (2) 50-pin male Amphenol connect-
ors, Customer connections via RJ48H 50-pin female
connectors or 14 RJ48C jacks.
Options
2555I2
CLEI: PWPQATE1AA
2555 Issue 2 Optional plug-in power supply, 115 VAC in-
put to-48 VDC 2.0 Amp output, 8’ male AC cord (wall plug)
2555I1
CLEI: PWPQK051AA
2555 Issue 1 Optional plug-in power supply, 115 VAC
input to-48 VDC 2.0 Amp output, 8’ male AC cord (wall
plug) plus 1’ female power cord receptacle
080-500455 Relay-rack-mounting kit for 19" or 23" racks
* CLEI is a trademark of Telcordia Technologies.
Table 5. Ordering and Optioning Information