GatesAir Intraplex VF-25, Installation And Operation Manual

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Intraplex VF-25 Voice Module 2 – Functional Description & Setup
Version 7.1, November 2009
2-2 GatesAir, Inc.
Intraplex Products
TDM Bus
Serial Control Bus
Drivers & Receivers
FPGA
PCM
CODEC
Level
Control
Input
Xformer
Output
Xformer
Local
Loopback
Remote
Loopback
1
2
3
4
5
6
SET SCB
ADDRESS
TERM
TS1
TS0
SIG OFF
REMOTE
SERVICE
1
2
3
4
5
6
1
2
3
4
5
6 AUX (LOCAL
LOOPBACK)
SELECT
TIME SLOT
Channel 1
Chan. 2 Chan. 3 Chan. 4
M Lead
Detect
M
I
n
p
u
t
SB
E Lead
Driver
E
O
u
tp
u
t
SG
Select Type
I, II, III, or V
VF
-2
5
Mo
d
u
le
M
o
d
u
le
A
d
ap
te
r
Figure 2-1. VF-25 Voice Module, Block Diagram
The PCM CODEC converts the eight-bit digital signal back to an analog audio signal and passes it to an
electronic level control, which allows the output level to be adjusted up or down in <0.5 dB
increments.