Section 365-361-206
7
1 2 3 4 5 6 7 8
O
N
O
N
1 2 3 4 5 6 7 8 9 10
RCV dB
XMT dB
S4
S5
XC
YC
Y
.1 .2 .4 .8
1 2 4 8 16
.1 .2 .4 .8
1 2 4 8 16
Jumper
wires
XC and YC
are actually
located on
the bottom
of the PCB
Figure 6. 3653–61 (Issue 6) 4W TO W/ER Option Locations and Optioning Summary
Table 2. Description of Figure 6
Option
Function
Position
S1, S2, S3
These designations not used on this module.
S4 and S5
Transmit and receive prescription gain controls. 0 to 32.5dB of gain can be
achieved in 0.1dB increments.
See paragraph 7.1
Y
Lead Conditioning (CGAW)
For a switched-ground output on pin 2 (1-lead) and an open on pin 6
(2-lead).
Open
For a ground on pin 6 (2-lead).
Close
XC
For an 8-bit encoding scheme in the transmit path and a greater signal-to-
noise ratio.
Cut Jumper Wire
For a 7 5/6-bit encoding scheme in the transmit path and for transmitting a
busy signal to the far end. (Traditional D4 4TO operation.)
Leave Jumper Wire
YC
For an 8-bit decoding scheme in the receive path.
Cut Jumper Wire
For a 7 5/6-bit decoding scheme in the receive path.
Leave Jumper Wire
7.1
Switches S4 and S5 (Transmit and Receive Prescription Gain Control)
Switch S4 is an 8-section (four sections for transmit and four sections for receive) DIP switch that provides be-
tween 0 to 1.5dB of gain in 0.1dB increments to compensate for office wiring loss in the transmit and receive
paths. Switch S5 is a 10-section (five sections for transmit and five sections for receive) DIP switch that provides
between 0 to 31dB gain in 1dB increments for adjusting the transmit and receive paths to the proper operating
levels. By turning all switches in S4 and S5 to the ON position, a total of 32.5dB of gain can be achieved for each
path.
7.2
Screw Y (Lead Conditioning)
Screw Y determines the output of pins 2 and 6 during carrier failure trunk processing. If a switched-ground is re-
quired on pin 2 during carrier failure (TP RELAY activated), close screw Y. To provide a balanced (floating) con-
tact between pins 2 and 6, open screw Y.
