Lan Signal Transmission; Transmit Side; Receive Side; Alarm And Control Functions - NEC PASOLINK Training Course

FUNCTIONAL OPERATION

2.12 LAN Signal Transmission

2.12.1 Transmit Side

2.12.2 Receive Side

2.13 Alarm and Control Functions

2-26
The data signal for LAN (10BASE-T or 100BASE-TX) transmission is
performed in the LAN INTFC module. Radio section throughput is
selectable for each port. When 2 Mbps throughput is selected, ITU-T
G.704 framing mode setting is available.
The data signal applied through the LAN PORT1 and/or PORT2 terminals
is fed to the LAN signal Switch Circuit which selects 10BASE-T or 100
BASE-TX. The data signal is converted to HDLC like frame for radio
transmission and multiplexed with specified frame in the main data signal.
The data signal for LAN network is extracted from the main data signal.
This data signal is performed HDLC like frame detection and fed to the
LAN signal switch. The data signal from the LAN signal switch is output
through the LAN PORT1 and/or PORT2 terminals.
Note: The switching of data between PORT1 and PORT2 is not
available.
Alarm and control functions of the IDU are described herein. Fault
detection circuits are provided in the IDU, sending signals to give alarm
indications and remote alarm reports (see Fig. 2-1, Fig. 2-2 and Table 2-
3).
The alarm signals initiated by detection circuits in the ODU are also sent to
the IDU. Therefore, the total alarm indications for the IDU and ODU are
provided by the IDU and ODU indicators on the IDU.
equipment is operating normally, these indicators on the IDU stay unlit.
When an abnormal condition occurs in the IDU (except power supply
failure), the IDU indicator lights and a remote alarm report is made. The
same applies for the ODU indicator.
To monitor/control the alarm and status of IDU/ODU, PM CARD module
communicates with pasolink network management system (PNMS) or
pasolink network management terminal (PNMT) via RS-232C (19.2
kbps).
ROI-S04488
When the