Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.
NOTE: CHANNEL 2 LAYOUT IS THE SAME AS CHANNEL 1, EXCEPT
DIP SWITCH SW3 CONTROLS THE TRANSMIT ATTENUATOR AND SW2
CONTROLS THE RECEIVE ATTENUATOR.
I/O
TRANS-
FORMER
TRANS-
FORMER
BUFFER
BUFFER
DIP
SWITCH
SW5
TRANSMIT
ATTENUATOR
RECEIVE
ATTENUATOR
DIP
SWITCH
SW4
PCM
CODEC
BUS SELECT
AND
DRIVER
LOGIC
LOGIC
ARRAY
M-LEAD
DETECTOR
E-LEAD
DRIVER
JUMPER E6
JUMPER E5
DIP
SWITCH
SW6
DIP
SWITCH
SW1
CHANNEL 2
(SEE NOTE)
M LEAD
MB LEAD
E LEAD
EB LEAD
+7 dBm
-16 dBm
TP1
E1
E2
M1
M2
TO/FROM
MUX
BUS A
TO/FROM
MUX
BUS B
Figure 8. Simplified block diagram, RFL VF-5A Dual-Channel Four Wire E&M Voice Module
RFL VF-5A RFL Electronics Inc.
June 28, 2005 16 (973) 334-3100