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4000 Digital Series II Issue 1.4 Panel User Guide

STA0380 Page 185

The Rotary Encoder Display still flashes "CALL" to indicate that the Rotary Encoder will scroll through

the SOFT Mode facilities.

The first digit press clears any previously disconnected called number from the display and starts a new

number above the first DAK. To correct an entry, CALL Mode is exited then re-entered using the Rotary

Encoder. This allows the first digit key press to overwrite the incorrect entry and start a new entry. Port

numbers can be 3 or 4 digits long.

When a number is entered, the CALL key is selected to attempt to establish the route to the port number.

If an invalid number has been entered the display shows the message "INVALID NUMBER" for a period

of one second. After a valid number the CALL key changes to an END key.

The END key terminates the call and reverts to being the CALL key.

After establishing a call, CALL Mode can be exited. The next time CALL Mode is selected the 'END' key

is displayed.

If SOFT Mode is exited the red LED on the SOFT button flashes to indicate that a call is active.

6.4.3.7 DIAL Mode

The Intelligent Control Panel can be used dial to external telephone lines. Calls are originated by

pressing the panel DAK with the 'DIAL' mnemonic and then selecting a DAK programmed to support a

connection to a Telephone Balance Unit, TBU. A DAK's route and control configuration in CMAPS sets

up the control that causes a telephone line connected to the TBU to go 'off-hook' and to create talk/listen

routes to the port number corresponding to the TBU unit.

Pressing a DIAL DAK automatically enters DIAL mode, from where the mnemonics of all DAKs assigned

as being of type DIAL flash. All other DAK mnemonics remain, but do not flash. The 'REPLY' key

mnemonic is replaced by the word 'EXIT'. Pressing 'EXIT' at this stage causes the panel to return to

normal operation.

Pressing a DAK with a flashing mnemonic allows telephone number dialling to start. The telephone line

is taken 'off-hook' when the DAK is pressed. The display shows the digits that have been pressed. While

a digit pushbutton is pressed the panel establishes an isolate route to the port number corresponding to

the TBU unit. The isolate route prevents any listeners to the panel from hearing the DTMF tones

generated during dialling. The panel microphone is dimmed during dialling to prevent external noise from

interfering with the DTMF tones.

Pressing the 'RLSE' key causes the telephone line to be placed back 'on-hook' and the 'RLSE' text to be

replaced by 'CNCT'. Selecting 'CNCT' causes the telephone line to be taken 'off-hook' again and the

'CNCT' text to be replaced by 'RLSE' once again.

Pressing the 'EXIT' key causes the panel to return to normal operation. If the line was 'off-hook' when

'EXIT' was pressed, the selected DIAL type DAK is latched.

A port number corresponding to the TBU unit can be accessed by pressing the DIAL type DAK without

having to enter DIAL mode. In this case the line will be held 'off-hook' until no keys accessing the same

TBU port are active. Once a telephone call has been established it is possible for another panel to take

over the call, provided that the panel has a DAK with the same TBU port and the same GPSF

programming.

On entering DIAL mode all LED signalisation is cleared. Pressing a digit pushbutton causes the relevant

digit's DTMF to be generated while the pushbutton is pressed. The red LED is lit while the pushbutton is

pressed.

: 0 8 9 8 D I A L R L S E E X I TD I A G

o oo o o o o o o o o oo o o o o o o oo o o o o oo o

0 1 2 3 6 754 9

Rotary

Encoder

1 2 ... 210 211 212 213 214 215 216 217 218 219 220 ... 235 236

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DRAKE 4000 series II Guía de usuario Pagina 215

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