ZyXEL Communications Multi-service Access Platform MSAP2000 - Manual (Page 57)

4. System Components
MSAP2000 Technical Manual V3.0 4-6
4.4. Common Control Modules
MSAP2000’s Common Control Modules form the basis for the
MSAP2000 System Platform. Common Control Modules include
Power Supply Modules (RtPSM, CoPSM), Main Processing
Modules (MPM), Expansion Link Modules (ELM), Expansion
Processing Modules (EPM), and Metallic Line Testing Modules
(MLTM).
Module Slot No. Function Note
CoPSM 21, 22 Power supply
RtPSM 21, 22 Power supply When RINGER is
needed.
MPM 19, 20 Main processing
ELM 1~ 18 Connection to
extension shelf
EPM 19, 20 Connection to Main
shelf
MLTM 1 ~ 16 External Subscriber
line testing
V5P 1 ~ 18 V5.2 Protocol
processing
CoPSM
The COT Power Supply Module (CoPSM) on the COT end
collects -36 to -72 DC power supplied by the Exchange Station,
and converts it into various types of DC voltage for use by
MSAP2000’s modules. Each COT will need at least one
CoPSM; a second CoPSM may be installed as a precaution, for
standby support.
RtPSM
The RT Power Supply Module (RtPSM) receives -36 to -72 DC
power, and converts it into various types of DC/AC voltages for
use by MSAP2000’s modules. Each RT shelf will need at least
one RtPSM; a second RtPSM may be installed as a precaution,
for standby support. RtPSM differs from CoPSM in the RINGER
generation for the phone services. A Rectifier can be added to
the RtPSM, so that it can receive 90-240 volts of AC power.
MPM
Both the COT and RT include a Main Processing Module (MPM),
which is used to provide a Local Craft Interface (LCI) and SNMP
Agent, to perform management functions such as system startup,
setup, maintenance, circuit performance analysis, testing, and
fault analysis. The MPM uses a non-volatile memory device to
save System operation data. The MPM also provides a Local
Craft Terminal Interface, which can be connected via the RJ9 port,
and Order Wire functions, which can be connected through the
RS-232 port on the lower right corner of the shelf panel.
ELM
The Expansion Link Module (ELM) is located within the Main
Shelf, and its function is to provide connection to the Extension