Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.
RFL VF-8A RFL Electronics Inc.
August 6, 2010 7 (973)
334-3100
Table 1. Controls and indicators, RFL VF-8A Selective Calling Unit
Item Name/Description Function
1 Ring LED (yellow), DS1 Lights when local phone is ringing
2 Busy LED (green), DS2 Lights when circuit is busy (in use)
3 Service LED (green), DS3 Lights when module service is ON
4 DIP switch SW1 SW1-1 to SW1-6 sets the SCB address in accordance with Table 2
SW1-7 selects local or remote mode as follows:
UP: local mode (using switches)
DOWN: remote mode (using SCB)
SW1-8 turns module service ON or OFF as follows:
UP: service ON
DOWN: service OFF
5 DIP switch SW2 SW2-1 to SW2-5 selects the time slot in accordance with Table 3.
SW2-6 enables or disables Bus A
UP: disable Bus A
DOWN: transmit on Bus A, receive on Bus B
SW2-7 enables or disables Bus B
UP: disable Bus B
DOWN: transmit on Bus B, receive on Bus A
SW2-8 (spare)
6 16 position rotary switch SW3 Selects the number of ring attempts (1 to 15, or unlimited) in accordance
with Table 4.
7 10 position rotary switch SW4 Selects group # (100’s position) of three number Station ID
8 10 position rotary switch SW5 Selects “tens position” of three number Station ID
9 10 position rotary switch SW6 Selects “units position” of three number Station ID
10 8 position DIP switch SW7 SW7-1 through SW7-5 (spare switches)
SW7-6 selects Signaling delay as follows:
UP: Signaling delay enabled
DOWN: Signaling delay disabled
SW7-7 and SW7-8 selects Busy Circuit Options in accordance with Table
5
11 8 position DIP switch SW8 SW8-1 (spare)
SW8-2 to SW8-8 selects Tx attenuation in accordance with Table 6
12 8 position DIP switch SW9 SW9-1 (spare)
SW9-2 to SW9-8 selects Rx attenuation in accordance with Table 6
13 J1 For future use
14 J2A For factory use only (jumper is always installed)
15 J2B For factory use only (jumper is always installed)
16 J3 For future use
17 J5 For engineering use only (J5 is not installed)
18 Test point TP1 Ground
19 Test point TP2 Digital +5VDC
20 Test point TP3 Analog +5VDC
21 Test point TP4 Analog +5VDC
22 Test point TP5 Analog +5VDC
23 Test point TP6 Analog -5VDC
24 Test point TP7 DTMF_CLKA (3.579545 MHz)
25 Test point TP8 TX audio before stereo volume control
26 Test point TP9 RX audio after stereo volume control
27 Test point TP10 TX audio after stereo volume control
28 Test point TP11 RX audio before stereo volume control
29 Test point TP12 Dial tone, busy tone, or ring back tone
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