DUAL TONE MULTI-FREQUENCY (DTMF) FUNCTIONS

1

The following DTMF functions require the MC-53DM or

2MC-45DM (option) microphone. The keypad on the

3microphone includes the 12 keys found on a push-button telephone plus an additional 4 keys (A, B, C, D). These

4additional keys are required for various control operations

5by some repeater systems.

■ Autopatch (U.S.A. and Canada)

Some repeaters in the U.S.A. and Canada offer a

service called Autopatch. Autopatch allows you to

access the public telephone network by sending DTMF

tones. Some repeaters require a special key sequence

to activate Autopatch. Check with the repeater control

6

7

8

MAKING DTMF CALLS

1Press and hold Mic [PTT].

operator.

■ Mic Keypad Confirmation Tones

When pressing the desired keys on the Mic keypad, this

2Press the keys in sequence on the keypad to send

9DTMF tones.

10

• The corresponding DTMF tones are transmitted.

11• Your transceiver remains in the transmit mode for 2 seconds after you release each key. So you can release

12[PTT] after beginning to press keys.

13

Freq. (Hz)

1209

1336

1477

1633

14

697

1

2

3

A

15

 

 

 

 

 

770

4

5

6

B

 

16

 

 

 

 

 

852

7

8

9

C

 

17

 

 

 

 

 

941

 

0

#

D

18

19

20

21

function produces feedback tones for your confirmation.

1

Press [MNU] to enter Menu mode.

2

Turn the Tuning control, or press Mic [UP]/[DWN],

 

to select Menu No. 16 (Microphone).

3

Press [s], then select Item No. 6 (DTMF Monitor).

CALL

 

PWR

 

 

 

VOL SQL

2

1

4Press [SET] to toggle the function ON or OFF (default).

5Press [MNU] again to exit Menu mode.

58