mWescom
~ACharles industries Company
Section DDL-201-301
Eauioment Issue 1
Second Printing,” December 1992
Wescom@DDL201 DuaLine Plusm
Central Office Terminal Shelf (23-inch)
General Description, InstallationAnd Turn-Up Procedures
clXl~Code: SIMCWU091?A
CONTENTS PAGE
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . ,. . . . . 1
FCC PART 15 SUBPART B, CLASS A
REQUIREMENTS .........................1
SITE REQUIREMENTS . . . . . . . . . . . . . . . . . ...1
INSPECTION .....!... ...................2
COT SHELF INSTALLATION ...............2
POWER CONNECTIONS ...................5
SIGNAL CABLING ........................5
COT MODULE INSTALLATION
AND POWER UP . . . . . . . . . . . . . . . . . . . . . . 6
PRE-PROVISIONING .....................8
GENERAL
The Central Office Terminal (COT) is arack mount
shelf unit and is located in the CO or CEV. One fully
equipped shelf is capable of supporting 12 DDL1XX
RT units. The COT is comprised of the following
units:
●DDL201 COT (23-inch) Shelf; the rack
mountable shelf is installed in aCentral Office
(CO) or Controlled Environment Vault (CEV)
which contains the COT units.
●DDL21 OCOT Power Unit; the plug-in power
supply in the COT shelf (one per shelf).
●DDL221 COT Common Unit; the plug-in unit
which performs common functions, such as
alarms, for the COT shelf (one per shelf).
cDDL230 or DDL235 COT Line Unit; the plug-in
unit which connects two lines from a
co-located CO or Digital Loop Carrier Remote
Terminal (DLC RT) to the local loop which is
being used as a 2-wire Digital Subscriber Line
(1 to 12 per shelf).
This practice is reprinted to make reference to the
DDL235 COT Line Unit. An editorial update is also
included.
FCC PART 15 SUBPART B, CLASS A
REQUIREMENTS
The A92-DDL201 COT Shelf, when configured with
the C91 -DDL21 O Power Supply Unit, the A91 -DDL221
Common Control Unit, and C91 -DDL230 Line Units,
(or their later issues), complies with the limits for a
Class Adigital device pursuant to SubpaR 15 of FCC
Rules. These requirements are designed to provide
reasonable protection against interference when
operated in acommercial environment, This
equipment generates and uses radio frequency
energy, and if not installed and used properly in
accordance with this user’s manual, may cause
interference to radio communications. Operation of
this equipment in aresidential area is likely to cause
interference; in which case, the user, at his own
expense, will be required to take whatever measures
may be required to correct the interference.
SITE REQUIREMENTS
The COT (23-inch) Shelf mounts in astandard
23-inch relay rack and occupies 7inches of vertical
rack space (four 1.75 inch rack mounting spaces).
One shelf has positions for one DDL221 COT
Common Unit, one DDL21 OCOT Power Unit and up
to 12 DDL230 or DDL235 COT Line Units, 25-Pair
Amphenol type connectors are used for CO line and
DSL (Digital Subscriber Line) connections.
The shelf is locally powered with -48Vdc Battery and
ground connections.
Tool Requirements
The following tools are required for mounting the
Shelf:
●Aflat blade screwdriver for Number 6screws
used on the COT mounting bracket.
●Afastening tool for whatever rack fasteners
are used.
●Wire cutting and stripping tools for power
wiring.
●TooIs for fabricating 25-pair cables with
Amphenol-type connectors.
●Test gear for checking COT voltages.
@1992Charles IndustriesLtd.
All rightsreserved
Wescom is aregisteredtrademarkof Charles IndustriesLtd.
Dual-ins Plus Is atrademarkof Charles IndustriesLtd. Page 1of 9
printed in UnitedStates of Amerioa.
The availabilityof features and technicalapeoificationshereinsubjectto change withoutnotice,
