Introduction
Test and Diagnostics Capabilities
The ASMi-450 has comprehensive diagnostics capabilities. ASMi-450 models with serial data port support the following types of test functions:
∙Local loopback on the user's port of the local ASMi-450 (LOOP LOCAL PORT).
∙Remote loopback on the user's port of the remote ASMi-450 (LOOP REM REM PORT).
These loopbacks may not be activated for an ASMi-450 equipped with Ethernet interface, because this would cause a continuous state of collision on the LAN, thereby disrupting the traffic on the LAN.
Maintenance is further enhanced by advanced self-test capabilities, and by an automatically performed power-up self-test that provides circuit-level diagnostics data.
Alarms
The ASMi-450 stores alarms detected during its operation in a buffer that can hold up to 100 alarms. During regular operation, the front panel LCD display shows if there are any alarms in the alarm buffer, to notify the local operator that alarm conditions have been detected. The local operator can then review the contents of the alarm buffer on the front panel display, and can delete old alarms.
In addition to the alarm buffer, front-panel LED indicators display in real time the activity on the ASMi-450 user's port, the state of the LAN, and the synchronization status and transmission quality of the HDSL line, and alert when test loops are present in the system.
Physical Characteristics
The ASMi-450 is a compact unit, intended for installation on desk tops or shelves. Unit height is only 1U (1.75").
An optional rack-mount adapter kit enables the installation of one or two ASMi-450 units in a 19" rack.
Power Requirements
The ASMi-450 can be powered by 115 VAC and 230 VAC, 47 to 63 Hz. As an option, the ASMi-450 can also be ordered with a -48 VDC power supply.
