Multi-Tech Systems MTA128NT 用户手册

 The ten LED indicators on the front panel (see figure below) of the MTA128ST/NT report status and line
activity.

Flashes when data is being transmitted (on for a space, off for a mark).

Flashes when data is being received (on for a space, off for a mark).

For EuroISDN NET3, INS64, and VN4 switch protocols, lights when the TA is turned on. For US NI-1, DMS-100,
and AT&T 5ESS switch protocols: On Steady, Link with central office is established (requires correct configuration
of SPIDs) Flashing, Physical layer is down or one or both SPIDs have not been verified with central office

When lit, indicates active data or voice connection on bearer channel 1.

When lit, indicates active data or voice connection on bearer channel 2.

Lights to indicate that the computer is communicating with the MTA128ST/NT, so the MTA128ST/NT can answer
an incoming call.

Lights when analog equipment on AUX port is active or off-hook.

 

Lights to indicate that the B channels have been multiplexed into a single 128 Kbps communications link.

 

Lights in combination with P2 and 128 LEDs to indicate which data protocol (V.110, V.120, X.75, PPP, MLPPP) is in
use as shown in the table below.

 Data Protocol

Lights in combination with P1 and 128 LEDs to indicate which data protocol (V.110, V.120, X.75, PPP, MLPPP) is in
use as shown in the table below.