Tait T2020II, Operator'S Manual

21

20

STAT

Ch

Fn

α

T2000

II

Sending DTMF Tones (DTMF Option Fitted)

The keypad on the T2020

II

may also send Dual Tone Multiple Frequency (DTMF) tones (con-

sult your Tait dealer to see if this option is fitted to your radio). This gives you the ability to dial

telephone numbers, if your radio network has an interconnection to the Public Switched Tel-

ephone Network (PSTN), or to send tones as control codes to remote devices.

1. To enter DTMF mode, observe which of the mode key indicators is currently illuminated

(i.e. Call, Status, Channel, Alphanumeric or Function) and push that key to deactivate the

function. This leaves the radio in DTMF mode, with the last number dialled showing in

the display window.

2. Press the 

Enter

 (

) key and the radio redials the number in the display.

3. Dialling a new number may be done digit by digit or as a complete number, as follows:
- To transmit the tone with each key-press (i.e. ‘live’), press the 

PTT

 key on the micro-

phone as you dial. (Your radio may be programmed so that you need only press the

number key.) The 

TX

 indicator appears in the display as you dial.

- To set up a complete sequence of digits, push each number key in turn without pressing

the 

PTT

 key (although your radio may be programmed to transmit the tones live, any-

way). Each number appears in the display.

- When the sequence is complete, press the 

Enter

 key to transmit the digits. Even if the

digits have been transmitted live, they are now retransmitted as a group.
In this mode, the transmission time of each digit is set by the radio, and is usually

shorter and more efficient than sending the tones live.

4. Pressing any of the keys on the keypad causes the corresponding DTMF tone to sound,

but this does not indicate whether or not the tone has actually been transmitted. Watch

your radio’s display to see if the 

TX

 indicator appears (without the 

PTT

 key pressed).

5. To access special DTMF tones A to D, your radio may be programmed to use the 

PTT

 key

as a shift key, to alter the function of some of the keypad keys, as follows:

-

PTT + 

2

ABC

 gives DTMF tone A

-

PTT + 

5

JKL

 gives DTMF tone B

-

PTT + 

8

TUV

 gives DTMF tone C

-

PTT + 

0

 gives DTMF tone D

User Programmable Scan

Depending on how your T2020

II

is programmed, you may be able to change the channels

that are included in your scan group. Existing channels can be removed and new channels can

be added, as required.
Edit the user programmable scan group, as follows:

1. Press the 

Function

 (

Fn

) key.

2. Scroll through the items in the display window using

the 

Up

 and 

Down

 (

/

) keys, until “PROG

GRP” is displayed.

3. Press the 

Enter

 (

) key. The name of the group

is displayed, and the top row of indicators is illumi-

nated.

4. Press the

 Enter

 key a second time to start the editing

the group.

5. Press the 

Up

 and 

Down

 keys to scroll through all the available channels. The 

SCAN

indicator indicates those channels that are included in the user programmable scan group,

and a flashing 

SCAN

 indicator indicates the home channel.

6. To add or delete a channel from the scan group, select the required channel and then

press the 

Enter

 key.

Note:

A scan group must contain 2 to 16 channels.

The home channel is defined by selecting a channel and then holding the 

Enter

 key for longer

than 1 second. The 

SCAN

 indicator then flashes.

Note:

You can only delete a normal channel from the scan group. If the home channel is to

be deleted from the scan group, you first have to define another channel as home

channel and then delete the original home channel.

7. Once the group editing is complete, press the 

Function

 key to return to the Function

menu.

8. Press a mode key to switch to another mode, if desired. Alternatively, the inactivity timer

returns the radio to the normal operating mode if no operator activity has been detected

for 10 seconds.