Daisy Chain Application with Ringdown Circuit
Add services of ring down circuits at drop points by daisy-chaining POTS Mux units together. The
ringdown circuit requires the use of an FXS/Sub unit at each end. Using this configuration, picking up a
phone at one end will automatically ring and connect the corresponding phone on the other end. This
feature enables the POTS Mux to function as a direct line analog phone system.
Fiber
Fiber
POTS
MUX
POTS
MUX
POTS
MUX
POTS
MUX
FXS/SUB
FXS/SUB
FXS/SUB
FXS/SUB
Analog Phone & Data
10/100M Ethernet
RS-232/422/485 Data
Ringdown Circuit Daisy Chain Application
Front Panel
The Analog Phone & Data Mux Over Fiber System front panel contains analog phone and E&M data
channel activity indicator LED’s along with a power LED and switch. The RJ-45 Ports on the front are the
four 10/100 Ethernet ports and the two RS-232 or RS-422/485 channels.
POTS Mux 16 Channel System Front Panel
LED status display
The yellow PHONE LEDs on the front panel indicated which analog phone (POTS) lines are being actively
used. E&M/Analog Data models will display active E&M/Analog Data lines in the phone LED status display.
Ethernet RJ-45 Ports
Four Ethernet ports use standard RJ-45 connectors. LED indicators on each port indicate the port
connection and speed. The LINK LED is ON when the port is connected to a LAN or other active link, and
the SPD LED is ON when the port auto-detects 100M speed.
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RLH Industries, Inc. • Tel. 866-DO-FIBER • Fax 714 532-1885 • www.fiberopticlink.com
