Fxs Port; Psu Slots; Table 4-6. Fxs Options - ADTRAN MX410 System Manual

MX410/MX412 System Manual

FXS Port

The port (MX412 only) provides a 2-wire analog interface between a Voice Frequency (VF)
FXS
transmission and a signaling facility. The FXS interface provides for simultaneous signaling in
each direction for use with 2-wire off-premises station lines, carrier extended PBX trunks, or
subscriber line foreign exchanges using a loop start signaling system. FXS options are shown
in Table 4-6.
Mode
Loop Start
PLAR D4
PLAR D3
FX Ringdown
The FXS Port interface must not be metallically connected to inter-
faces which connect to the OSP or its wiring. The FXS interface is
designed for use as an intra-building interface only. The addition of
Primary Protectors is not sufficient protection in order to connect
the FXS interface metallically to OSP wiring.

PSU Slots

The MX410 houses up to two hot-swappable PSUs that can provide power redundancy. At
least one MX410 PSU (P/N 1189501L1) must be inserted into the MX410 for the MX410 to
function. To remove a PSU, remove the screws that hold it in place and carefully pull the PSU
straight out of the MX410. A blank PSU cover (P/N 1189502L1) should be used to cover an
unused PSU slot. Refer to
inserted for the MX410 status.
The MX412 contains an internal power supply.
61189500L1-1B

Table 4-6. FXS Options

Description
Selects ANSI T1.403 FXS Loop Start mode of operation
Selects Private Line Automatic Ringdown where onhook = 00.
Signaling must match the PLAR unit at the distant end.
Selects Private Line Automatic Ringdown where onhook = 11.
Signaling must match the PLAR unit at the distant end.
PLAR mode of operation that allows for an FXS Loop Start unit on the
distant end.
WARNING
"LED Indicators" on page 4-10 after power is applied and a PSU is
Front Panel
PRELIMINARY 4-9