Verilink 1558A (CG) Configuration/Installation Guide - Manual (Page 2)

1558A Block Diagram
B
NET
-20 to 56 VDC/RTN
(Power A)
-20 to 56 VDC/RTN
(Power B)
Power
COM Bus
DTE
RJ48
Rx
Tx
Rx
Supply ±12 VDC
+5 VDC
Tx
Power
Line
Deframer
NET A
Framer
Loop
Line
Protection
Fac.
Loop
PLB
APS
Select
Path A /B
Bridge
Jack
Receive
Jack
NET A
Bridge
Jack
Transmit
Jack
A
RJ48
Line
Protection
NET
Rx
Tx
Line
Deframer
NET B
Framer
Loop
Line
Protection
Fac.
Loop
PLB
Bridge
Jack
Receive
Jack
NET B
Bridge
Jack
Transmit
Jack
B
RJ48
Line
Protection
Framer
Deframer
Eq.
Loop
Line
Protection
Line
Protection
Bridge
Jack
Receive
Jack
Bridge
Jack
Transmit
Jack
DTE
DTE
Bypass Mode
(Path A to DTE)
Fault
CPU
Fault
Signal
Split
A
ROM
RAM
CPU
Loop
Set/Reset
SUPV
Port
Performance History,
Alarms, Unit Address
OUT
COM Bus
IN
Alarm
Contacts
(COM,
NO, NC)
BERT: QRSS,
1:8, 3:24, etc.
NET B
NET A
Switch S4 Switch S3
1 2 3 4 5 6 7 8
1 64 128 32 16 8 4 2
NOTE: Address values are additive for all switch positions
set to the ‘ON’ position. For example, if positions 1 and 3 are
set to the ‘ON’ position, the unit address is set to 5 (1+4).
Also note that Switch 3, Position 1 is factory wired to the ON
position. This forces all Path A unit addresses to odd values
and all Path B addresses to even values. The factory default
is all switches set to ‘OFF’ (Path A address set to the ONE
and Path B address set to Two)
Value
On
Off
1 2 3 4 5 6 7 8
P
a
th
A
LB
O
P
a
th
A
LB
O
P
a
th
B
LB
O
P
a
th
B
LB
O
D
T
E DSX
D
T
E DSX
D
T
E DSX
N
o
t Use
d
LBO S4-1 S4-2 S4-3 S4-4
0 dB Off Off Off Off
7.5 dB Off On Off On
15 dB On Off On Off
22.5 dB On On On On
S4-5 S4-6 S4-7 DSX
Off Off Off 133 ft
Off Off On 266 ft
Off On Off 399 ft
Off On On 533 ft
On Off Off 655 ft
On
Off