
Quick Start Guide Installation and Operation Manual
2 Installing ASM-40 ASM-40 Ver. 1.0
DIP Switch Function Possible Settings Factory
Setting
the front panel pushbuttons OFF – The diagnostic tests cannot be activated
via the front panel
V54E section,
SW3/2
Controls activation of the local
digital loopback when remote
digital loopback is initiated
from the remote unit
ON – Local digital loopback activation is enabled
OFF – Local digital loopback activation is
disabled
ON
CNTE section,
SW3/3
Selects the transmit carrier
mode
ON – Carrier follows the RTS line
OFF – Carrier is constantly ON
OFF
Note: For ASM-40 units with G.703 Codirectional DTE interface, the CNTE section (SW3/3) must be set to OFF.
B/UB section,
SW3/4
Selects the line impedance:
Balanced: terminal block or DB-
15
Unbalanced: BNC
ON – 75Ω (for 32, 64, 128, 256, 512, 1024,
1920 and 2048 kbps)
OFF – 120Ω (for 32, 64, 128, 256, 512, 1024,
1920 and 2048 kbps)
According to
the connector
type
Note: 100Ω line impedance is set by selecting one of the following data rates: 192, 384, 768, 1536 and 1544 kbps. In
this case, the settings of the SW3 B/UB section are ignored.
ALBE section,
SW3/5
Enables local analog loopback
activation from the DTE
(via pin 18 for V.24, RS-530,
V.36 or via pin “JJ” for V.35)
ON – The local analog loopback activation from
the DTE is enabled
OFF – The local analog loopback activation from
the DTE is disabled
OFF
Note
:
Set this section to DIS if the DTE interface does not support the local analog loopback activation via the
appropriate pin.
RLBE section,
SW3/6
Enables remote digital loopback
activation from the DTE (via pin
21 for V.24, RS-530, V.36 or
via pin “HH” for V.35)
ON – The remote digital loopback activation
from the DTE is enabled
OFF – The remote digital loopback activation
from the DTE is disabled
OFF
Note
:
Set this section to DIS if the DTE interface does not support the remote digital loopback activation via the
appropriate pin.
SW5 Selects data rate
SW54
SW53 SW52 SW51
0 0 0 0 2048
0 0 0 1 1920
0 0 1 0 1544
0 0 1 1 1536
0 1 0 0 1024
0 1 0 1 768
0 1 1 0 512
0 1 1 1 384
1 0 0 0 256
1 0 0 1 192
1 0 1 0 128
1 0 1 1 64
1 1 0 0 32
256
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