Foreign exchange office module (fxo) – ZyXEL Communications Multi-service Access Platform MSAP2000 User Manual
Page 150

7. Product Specification
MSAP2000 Technical Manual V3.0
7-43
7.16. Foreign
Exchange
Office Module (FXO)
Overview
The Foreign Exchange Office Module (FXO) provides 16 analog voice
interfaces, to provide connection to COT voice interchange devices,
such as telephones, fax machines, and modems.
Features
And
Benefits
Panel LEDS indicate status, faults, alarms, and network
connections.
Loop status detection and Signaling exchange
A-law or u-law compounding
Application of advanced DAA (Data Access Arrangement) design
Alarm and Fault monitoring and reporting
Timeslot assignment for Voice Services
Use of non-volatile memory devices for performance data storage
Function Diagram
Application
FXO provide Z-interface to 2-wire analog PSTN switch. And when it is
used, a corresponding FXS must be installed in the RT to provide the
voice services.
OIM/
SM1/
SM4
FXS
FXS
MLTM
MPM
Test Bus
OIM/
SM1/
SM4
FXO
FXO
MLTM
MPM
PSTN Switch
Test Bus
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