®
TRANSPORT
1558A APS
Configuration Guide
1558A Front View
Part Number 45-00083
Revision 2.0
SUPV PWR
A
B
STATUS
ABYPASS LOCKED B
SELECT
A
PATH
AUTO
B
PATH
STATUS
ALM LOS LP
A
B
N
E
T
A
RX BRDG
TX BRDG
N
E
T
B
RX BRDG
TX BRDG
DTE
LP
LOS
RX BRDG
TX BRDG
D
TxPORT 1558A
T
E
AUTO T1 PROTECTION SWITCH
1 2 3 4 5 6 7 8 9 10 10 11 10
1558A Controls and Indicators
Index Indicator Description
1 SUPV The Supervisory port allows the user to connect to the 1558A via a PC running the suppl ied L APS softw are.
2 Power One or both of these green LEDs will be ON when a nominal power source of -20 to -56 VDC is present on the PWR A and PWR B terminals.
3 Bypass This red LED indicates whether the unit is in a ‘bypass’ mode of operation (ON if the unit has detected a CPU watchdog operational fault and OFF
4 Locked When the 1558A has been m anua lly forc ed to eithe r the A or B path , th is ambe r LED is o n. Mov ing t he Pa th Se lect s witc h back to the AUTO
5 A / B These amber status LEDs indi ca te which of the two T1 receive paths (A or B) is presen tl y being utilized
6 Path Select
Auto/A/B
7 Alarm These red LEDs indica t e that the user definable alarm parameter s (ES, CS E S , L OS, and LOF) have been met or exceeded for Path A or Path B.
8 LOS This amber LED indicates that no T1 pulses are being detected on the receive signal path s from the network for Path A or Path B.
9 Loop Th is am ber LED indicates that a loop has been activa te d for Path A or Path B.
10 Test Jacks Bantam test access jacks and bridge/monitor jacks are provided to gain physical access to the T1 path for NET A, NET B, and the T1 DTE path.
11 Loop/ L O S The amber ‘Loop’ LED indicates that a loop has been activated on the DTE. The red ‘LOS’ LED indicates a loss of signal on the DTE.
under normal operat ion.
position turns off this LED and restores normal APS operation.
The user can manually force and lock eith er the A or B path as the act ive path by moving this switch from the AUTO position to either the A or
B position. The 1558A is now ma nually locked to this path and will not switch fro m it, even if the selected path is or will be in a failed state.
1558A Rear View
Switch S1
DTE to NET
Pass FDL
NET to DTE
Pass FDL
DTE to NET
Pass CRC
NET to DTE
Pass CRC
Card Function
Master
ARM
On
12345678
Off
Slave
ARM
Block FDL
Block FDL
DTE to NET
NET to DTE
Regen CRC
DTE to NET
Regen CRC
NET to DTE
Card Function
from RAM
Boot Mode
Boot Mode
S1-7 S1-8 Boot from
Off
Off Switches
Off On Manager
On Off RAM
from ROM
On On ROM
DTE COM BUSNET BNET A
S1
IN OUT
NOTE: For future reference, all DIP switches
on this sheet are provided with boxes to check
according to the particular user selection. Factory default settings are shown underlined
.
Switches S3 and S4 are shown on the back side.
S2 S3 S4
Framing Errors
Disabled
LOS
On
12345678
Off
LOS
Enabled
Framing Errors
GND
-20 to -56 VDC, 200 MA
Switch S2
Disabled
NET A
AMI
NET B
AMI
B8ZS
B8ZS
NET B
NET A
Enabled
–VDC (A)
DTE
DTE
RTN (A)
AMI
B8ZS
–VDC (B)
RTN (B)
Alarm NO
Common
Alarm NC
CSU Mode
Path Revert
Enabled
DTE Framing
Disabled
D4
ESF
Enabled
Disabled
CSU Mode
Path Revert
DTE Framing
1558A Block Diagram
CPU
Fault
Power
Fault
Rx
DTE
RJ 48
Tx
Bypass Mode
(Path A to DTE)
Line
Protection
Line
Protection
COM Bus
IN
COM Bus
OUT
Alarm
Contacts
(COM,
NO, NC)
Select
Path A /B
DTE
Bridge
Jack
Bridge
Jack
Receive
Jack
Transmit
Jack
DTE
Loop
Set/Reset
CPU
ROM
RAM
SUPV
Performance History,
Alarms, Unit Address
APS
Port
Eq.
Loop
A
B
Deframer
PLB
Framer
Fac.
Loop
Line
Loop
+5 VDC
Bridge
Jack
Bridge
Jack
Receive
Transmit
NET A
Jack
Jack
Power
NET A
Framer
±12 VDC
Supply
Line
Protection
Line
Protection
-20 to 56 VDC/RTN
(Power A)
-20 to 56 VDC/RTN
(Power B)
Rx
NET
A
RJ48
Tx
NET A
Deframer
Signal
Split
BERT: QRSS,
1:8, 3:24, etc.
NET B
Deframer
PLB
Framer
Fac.
Loop
Line
Loop
Bridge
Jack
Bridge
Jack
NET B
Receive
Transmit
NET B
Jack
Jack
Line
Protection
Line
Protection
Rx
NET
B
RJ48
Tx
Value
1
On
12345678
Off
NOTE
: Address values are additive for all switch positions
4
2
16
8
64
32
128
set to the ‘ON’ position. For examp le, 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, Positio n 1 is factory wire d 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)
Switch S4 Switch S3
Path A LBO
Path A LBO
Path B LBO
Path B LBO
On
12345678
Off
LBO S4-1 S4-2 S4-3 S4-4
0 dB Off
7.5 dB Off On Off On
15 dB On Off On Off
22.5 dB On On On On
Off Off Off
DTE DSX
DTE DSX
DTE DSX
Not Used
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
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