ZyXEL Communications Multi-service Access Platform MSAP2000 - Manual (Page 117)

7. Product Specification
MSAP2000 Technical Manual V3.0 7-10
7.5. Remote Terminal Power Supply Module (RtPSM)
Overview
The Remote Terminal Power Supply Module (RtPSM) provides ring
power for remote FXS, and FXS-P. If the COT has FXS, FXS-P
modules installed, an RtPSM module will need to be installed upon the
same Shelf as well.
An additional RtPSM can be installed on the same shelf, to provide 1+1
power redundancy support.
Features
And
Benefits
„ LEDs on the front panel indicate the RtPSM status, fault occurrences,
and fuse status.
„ Circuit protection for low input voltage and output over currents
„ Over current protection for input and output interfaces.
„ Automatic protection against over-temperature occurrence.
„ Test connection port located on the Front Panel.
„ Digital control and Alarm Reporting.
Function
Diagram
Application
RtPSM shall be used as the Power supply in those shelves that
FXS/FXS-P are installed for the RING voltage generation.