Telect MIX 56 user manual Modem Operation

3 User Functions MIX 56 User Manual

When you insert a plug into the monitor jack, the jack’s LED flashes for 30 seconds, and then lights steadily. If the circuit is cross-connected, the cross- connected network element’s LED flashes and lights, as well.

MONITORING A NETWORK

ELEMENT’S OUTPUT SIGNAL

LED lights when monitored

LED of the cross- connected network element also lights

Monitors output of Network Element #1

NETWORK

ELEMENT #1

MM

OO

III

NETWORK

ELEMENT #2

(cross-connected to Network Element #1)

MODEM OPERATION

You can connect a modem to the MIX 56 serial port to control the system remotely over an analog phone line. To do so, you must set the “Modem Detect” field on the System Interfaces screen to “Enabled” (Chapter 2) and install the modem according to the instructions in Chapter 2. When you have done so, activate the modem by pressing and holding the ACO switch until all LEDs light (LED test), then release the switch.

If you set Modem Detect to “Enabled,” but you have a PC rather than a mo- dem connected to the MIX 56 serial port, the modem detect code “+++ATQ” appears on the screen at the current location of the cursor when you release the ACO switch. To clear the “+++ATQ,” switch to another MIX 56 screen.

The modem automatically detects baud rate at the MIX 56 serial port when the modem is off-line. Once the modem is on-line, it will not change its baud rate. If you change the MIX 56 baud rate (System Interfaces screen) while the modem is on-line, you create a baud mismatch between the MIX 56 and modem, which shuts down the connection. The only way to regain the connection is to “hang up” at the remote modem, press the ACO switch until the LED test starts, release the switch, and reestablish the link from the remote end.

To disconnect a modem, see the instructions in Chapter 2.

3-4 Telect, Inc. 122188-10 A0