Technical Guide

E241C Push Button Functions

User-Accessible Button — Press Duration Behaviors & System Responses

Press Duration

Trigger Condition

Action

50 ms – < 1 sec

Brief press, any time

Enter serial shell configuration prompt

≥ 5 sec at power-up

Held during power-up, released after 5 s

Factory reset — all user settings restored to defaults

> 5 sec (running)

Held while device is running, released after 5 s

Configuration report sent to printer (TCP/9100)

50 ms – < 1 second  Serial Shell Configuration Prompt

•    Disconnects the 241 from the active message loop.

•    Forces any active tunnel connection to close.

•    Enters the serial shell configuration prompt via the serial port.

•    Prompt remains active until the exit ACP command is received, or 30 seconds pass with no valid command.

•    After the session ends, the 241 returns to normal tunneling availability.

≥ 5 seconds at power-up  Factory Default Reset

•    Hold button during power-up for 5 or more seconds, then release.

•    All user-modifiable settings are restored to factory defaults.

•    After reset completes, the 241 boots normally.

> 5 seconds (device running)  Configuration Report — Printer

•    Hold button for more than 5 seconds while the device is running, then release.

•    A full 241 configuration report is sent to the attached printer on port TCP/9100.

•    Useful for generating a physical record of the current device configuration without a computer.

⚠  Caution: Factory Reset is Irreversible

All user-configured settings — network parameters, output formats, card type assignments, and any other customizations — will be permanently erased. Record your current configuration before performing a reset.

Press Timing Precision

The 50 ms minimum threshold prevents accidental activation from noise or incidental contact. Presses shorter than 50 ms are ignored. Presses at exactly 1 second or longer do not trigger the serial shell function — they transition to the 5-second behaviors based on total hold time.