ZyXEL Communications Multi-service Access Platform MSAP2000 - Manual (Page 16)

1. System Introduction
MSAP2000 Technical Manual V3.0 1-5
1.3. System Architecture
Scalability
MSAP2000 is mounted on a 19-inch shelf, which can be installed
on a standard ETSI ETR 300 119 rack. When the subscriber
quantity increases, System capacity can be expanded simply by
adding extra racks. The total System capacity can support up to
7560 lines of telephone interfaces (equal to 63x4 lines of E1
capacity).
Universal Shelf
MSAP2000’s universal shelf design allows various user interface
modules to be randomly installed in any one of its 1-16 slots. Its
simple Plug-and-Play design provides flexibility in use, and
Service Providers can simply add-on shelves and modules, as
their subscriber quantity and revenue increases.
Expansion
MSAP2000 when the total lines are required to expand, the
shelves can be linked with ELM and EPM easily. Each node by
the system design can have one main shelf and up to 8 expansion
shelves. The limitation is based on 1+1 requirement of ELM/EPM
link. That will require up to 16 links. And that will use the all
general user slots.
Modularity
All MSAP2000 modules are designed as plug-in cards with
ejectors, for easy insertion and extraction. Each interface
module can be hot-plugged or unplugged, without affecting the
ongoing service of other modules.
Upgradability
MSAP2000 supports software upgrade functions for various
modules. Operators can connect to the Local Craft Terminal
(LCT) via RS-232, to upgrade any module in the COT or in the RT.
Feature Proof
MSAP2000 simultaneously supports Time Division Multiplexing
(TDM) and Internet Protocol (IP) technologies. With these
functions, an existing system shelf can simply re-orientate its
original 2W FXO and V5.2 PSTN switch interface into new Voice
over IP (VoIP) Softswitch, simply by software upgrade or module
expansion. The original Voice Interface Modules (FXS, FXS-P,
2W/4W E&M) can continue to be used, and the System can be
seamlessly migrated from TDM towards a new IP Network
structure, without additional investments on the Service Provider’s
side.