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Figure 10-4
Connecting the Headset Accoustic Limiter to the M4020
Headset
NT2B36
Tx
Tx
Rx
Rx
Notes:
1.
A jumper may be added between pins 2 and 4 to provide a fixed 6 dB gain.
2.
Either positive or negative dc voltages may be used. The polarity between pins 1 and 11
is nonpolar.
3.
A jumper between pins 10 and 12 raises the maximum ROC output power from 1.02 mW to 3.2 mW.
4.
The Receiver Optimizer Circuit (ROC) is to be provided and wired by the telco.
5.
The current drain per ROC is less than 10mA.
Jack Box
NT4X7210
Rx
Output Port #1
Rx
Output Port #2
Connecting the Meridian M4000 Terminals 97
M4020
Transmit Line Pair
12
10
2
3
Receiver
6
Optimization
Circuit
8
(ROC)
9
11
1
18 to 75 VDC (-48V) (C.O.)
RJ14C
4
5
Receive Input
7
450-0520
Practice 450-1011-201
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