ZyXEL Communications Multi-service Access Platform MSAP2000 - Manual (Page 111)

7. Product Specification
MSAP2000 Technical Manual V3.0 7-4
7.3. Common Shelf
Overview
The common shelf is MSAP2000’s most basic and crucial component, and
it is mounted upon a 19 or 23-inch rack. Each shelf provides 22 Module
slots. The Shelf is composed of a System backplane, and a metal
chassis. A dipswitch on the System backplane will allow the user to
determine the Node/Shelf type. Within a network composed by
MSAP2000, one Central Office Terminal (COT) can connect multiple
Remote Terminals (RTs) in various topologies, and each node can
accommodate one Main shelf and up to seven extension shelves.
Slots 1~16 of the shelf are used to accommodate Modules with electric
interfaces, or Modules which fits into the front panel. Slots 17~18 are for
Modules that do not require backside cable outlets. Slots 19~20 are for
control Modules, and slots 21~22 are for power Modules.
Ports on the back of the Shelf include two sets of DC power inputs, an
external clock input, an alarm input, a test input, and a module electrical
interface. These take the form of wire-wrap posts, for convenient
maintenance.
Features
And
Benefits
„ Total bandwidth amounts to 3.6 Gbps (3.2 Gbps IP bus and
409.344Mbps Telecom/TDM bus).
„ MSAP2000’s 22 slots for various Modules provide high flexibility.
„ A common Shelf design allows it to be used both ways, either as a COT
or RT shelf.
„ The RS-232 port on the Shelf front can provide CIT (Craft Interface
Terminal) connection that supports all VT-100 emulator or
HyperTerminal runs on Windows 2K, Windows XP or Windows Vista
OS.
„ The 10/100 Mbps Ethernet port (RJ45) on the Shelf front allows for
connection to OptiCore ™ for network management.
„ The RJ-9 Order Wire port on the Shelf front provides phone connection
services for field operators.
„ Provides 6 alarm outputs and 7 alarm inputs.
„ Provides 2 external clock inputs (2Mbps or 2MHz), and 1 external clock
output (2Mbps).
Function
Diagram