Section 365-336-202
7
T
S
I
G
R
S
I
G
O
N
1 2 3 4 5 6
O
N
1
2
S3
.1 .2 .4 .8
O
N
1
2 3 4
S2
1 2 4 8
O
N
1 2 3 4
16
5
S6
S4
.1 .2 .4 .8
O
N
1
2 3 4
S5
1 2 4 8
O
N
1 2 3 4
16
5
S8
MLB
S9
SX
OPN
LP
S1
O
N
1 2
S11
3
TO 20 LB
DIS 4 DIS
XMT ATTN (DB)
ELL
RCV ATTN (dB)
.5 1 2 4 8 16
T
&
R
T1
&
R1
DROP
3653-36
MLB
LINE
DROP
LINE
LB
4W
TO/ER/LB
ISS 2
GAIN
ATTN
S7
Figure 4. 3653–36 Option Locations
Table 1. Description of Figure 4
Option
Position
Use to
S1
SX (Simplex)
Sealing current is generated by the channel unit with automatic
ZAP when the module is first plugged in.
OPN (Open)
No sealing current.
LP(Loop)
Loop sealing current supplied from the other end of the analog
facility by the channel unit via the simplex leads of transformers
T1 and T2.
S2, S3
ON/OFF as required. Refer to
Transmit Alignment in Part 8
Switches S2 and S3 form a 9-section DIP switch that provides
up to 32.5dB of attenuation, in 0.1dB steps, for adjusting the
transmit path to the proper operating level at the ENCODER
input.
S4, S5
ON/OFF as required. Refer to
Receive Alignment in Part 8
Switches S4 and S5 form a 9-section DIP switch that provides
up to 32.5dB of attenuation, in 0.1dB steps, for adjusting the
receive path to the proper operating level output at leads T1 &
R1.
S6, S7
ON/OFF as required. Refer to
Equal Level Loopback Alignment
in Part 8
Switch S6 is a 6-section DIP switch that provides up to 31.5dB
of equal level loopback in 0.5dB steps. S7 is a 2-position slide
switch that selects loopback path gain or attenuation.
S8–1
TO (ON)
For automatic loopback timeout.
DIS (OFF)
For no loopback timeout.
S8–2
20 (ON)
For 20-minute loopback timeout.
4 (OFF)
For 4-minute loopback timeout.
S8–3
LB (ON)
For tone-activated loopback enable.
DIS (OFF)
To disable tone-activated loopback.