RAD Data comm ASMI-450 - Manual (Page 23)

Introduction
ASMi-450 Installation and Operation Manual 1-5
Figure 1-D. Flow of Timing Signals through ASMi-450 System in the Internal Timing Mode
•
ASMi-450 Unit Configured as Remote Unit (NTU). The ASMi-450 unit
configured as remote unit always locks its internal system timing to the
incoming HDSL signal, which is received from the ASMi-450 unit
configured as central unit. The receive path of the ASMi-450 uses the
recovered timing to generate the data stream supplied to the equipment
connected to the remote user's port. Therefore, the receive path of the
remote ASMi-450 transparently transfers the timing from the HDSL line to
the remote user's equipment.
Control of
ASMi-450
Operation The ASMi-450 system is designed for unattended operation. The configuration
of the ASMi-450, that is, a complete collection of operating parameters, is
determined by a data base stored in non-volatile memory.
Local Control
The ASMi-450 can be controlled by means of a simple menu, operated by push-
buttons located on the front panel. During set-up, an LCD display guides the
operator in the execution of the desired operations. The display provides
information concerning the current system configuration and operating mode,
and the available values of each programmable parameter. In case of operator
errors, the ASMi-450 displays a message that explains the error and helps the
operator take the correct action.
Remote Management
In addition to front panel control, the ASMi-450 supports management from a
remote location. The remote management capabilities can be used to perform
the following activities:
•
ASMi-450 configuration.
•
Reading of ASMi-450 status.
•
ASMi-450 testing.
•
Display of alarm status and history.
CENTRAL ASMi-450
User
Interface
REMOTE ASMi-450
HDSL
Line
Timing
Source
HDSL Line
Interface
HDSL Line
Interface
User
Interface
Remote
User's
DTE
Local
User's
DTE
Internal
Timing
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