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Chapter 3 Operation ASM-60 Installation and Operation Manual
3-2 Operating ASM-60
Table 3-1. LED Indicators (Cont.)
Name Function
SYNC A (red/green) ON (red) – Data link A is not synchronized with the remote modem
ON (green) – Data link A is synchronized with the remote modem
SYNC B (red/green) ON (red) – Data link B is not synchronized with the remote modem
ON (green) – Data link B is synchronized with the remote modem
3.2 Operating ASM-60
Turning On ASM-60
ASM-60 is turned on as soon as the power is connected to the unit. The PWR
indicator lights up and remains lit as long as ASM-60 receives power.
Normal Operation
Always operate ASM-60 in pairs: ASM-60/CO opposite ASM-60/CPE.
ASM-60 requires no operator attention once installed, with the exception of
occasional monitoring of front panel indicators. Intervention is only required when
ASM-60 must be adapted to new operational requirements.
Normal Indications
Table 3-2 shows the status of the ASM-60 indicators, a few seconds after
power-up.
Table 3-2. ASM-60 Indicator Status
Indicator Status
PWR ON
TD Depends on DTE data transmission
RD Depends on DTE data transmission
RTS Depends on DTE RTS signal status
DCD Depends on remote modem data transmission
TST OFF
ALM OFF
SYNC A/SYNC B Green or red, depending on remote modem data transmission
If the above LED indications are not obtained following initial power turn-on, refer
to Chapter 5 for the diagnostic test instructions.
Turning Off ASM-60
To turn off ASM-60, remove the power cord from the power source.