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APPENDIX 1

A & B buttons & the 7 Segment Display

The A & B buttons are used for setup and measurement functions.

When no buttons are pressed for a 1 minute period, the display will automati-

cally return to the received radio signal strength (FSSI) display.

The DualCom 7-segment display has 3 distinct modes.

1. Power up - Reset Mode

The A & B buttons can clear some NVM settings. See Table 34.

The display first shows all segments ‘on’ and all LEDs ‘on’ for 1 second.

Then, the software version number as two separate 1 or 2 digit numbers.

Then, the EN50136 Grade,

Then, the initialisation states of the Radio, LAN & PSTN paths.

Press A button then Reset or Power-up the DualCom. This will clear the

Plug-on Adapter memory and clear any pending calls stored in the NVM.

The button should be held down until the Dualcom ‘beep-beeps’ to acknowl-

edge this function. This also resets the polling delay to 45mins.

2. Communication Mode

The A & B buttons are disabled during communication. See Table 33.

The display shows large C for Wired comms. and small c for Radio comms.

Call progress is shown by C1, C2, C3 and ‘A’ to indicate a successful call.

The appropriate GSM, PSTN or LAN LEDs will light to indicate activity and

call progress.

3. Normal Mode

This ‘normal’ mode means that the DualCom is not in Power-up - Reset

mode and not in Communication mode. See Tables 30, 31,32 and 36.

The A & B buttons can select display options and Program the NVM.

When the A & B buttons are not pressed for 1 minute, the display will return

to the received radio signal strength (FSSI) value (00-99).

Any Error Code will display for 1 minute before reverting to the FSSI value.

CSL GradeShift User Manual

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