Table of Contents
Advertisement
System Description
The OCM Shelf
The OCM shelf is constructed of formed sheet metal components measuring 7 inches (178 mm)
high by 17.5 inches (445 mm) wide by 11.5 inches (292 mm) deep. Other features are:
•
19-inch or 23-inch racks or cabinets can be accommodated by reversible mounting brackets.
•
Center-of-gravity mounting is accomplished with several locations of mounting brackets
•
Each shelf accepts one or two power supplies.
•
Sixteen module slots and two power supply slots per shelf.
•
An expansion shelf provides an extra two power supply slots and sixteen module slots.
•
A shelf address jumper sets the address for each shelf in a two-shelf system.
•
The rear panel is factory configured with connector panels (consisting of dual 8-pin modular
jacks in Zone 1 and DB-25 connectors in Zone 3 (See Figure 1-1 on page 1-5). The rear of the
OCM shelf with typical cabling is shown in Figure 1-2 on page 1-12.
•
Plug-in power supply modules are available in the following voltages:
•
100/120 VAC (47-63 Hz)
•
220/240 VAC (47-63 Hz)
•
-48 and -60 VDC (station battery) version (designed to meet Conducted Emissions
requirements in Bellcore 1089)
•
Shelf power supply front panel provides: Power On switch, and Power On (green) and Failure
(red) indicator.
Note
Shelf installation is described in
Shelf Zones
The rear panel of the OCM Shelf is divided into three horizontal rows, or Zones that accept a
connector panel that is pre-configured at the factory. Zone 1 (at the top) is used for network
interfaces, voice, and in some applications, digital interfaces. Zone 2 is used for internal busses and
power. Zone 3 (at the bottom) is used for digital interfaces (EIA/TIA-232-E, V.35, etc.).
Figure 1-1
1-4
Chapter 2, Shelf Installation
OCM SHELF (Front View)
J17
J18
J19
J20
J21
J22
J23
J24
J25
J33
J34
J35
J36
J37
J38
J39
J40
J41
J1
J2
J3
J4
J5
J6
J7
J8
OCM Shelf Front View
Office Connunications Manager OCM-1000/OCM-2000
Installation & Operation
.
J26
J27
J28
J29
J30
J31
J32
J42
J43
J44
J45
J46
J47
J48
J9
J10
J11
J12
J13
J14
J15
J16
The OCM Shelf
ZONE 1
Network and Analog
Connections
ZONE 2
Signal, Ground, and Power
Distribution to Plug-in Modules
ZONE 3
Business Equipment
(DTE) Connections
036R340-000
Issue 16
Advertisement
Table of Contents
