11 Attachment: Technical Information
11.1 LAN-CPU Time Server Module
The LAN-CPU module is a complete single-board com-
puter with LINUX operating system and pre-installed
NTP server. The board can be integrated into various
GNSS, DCF77, WWVB, MSF or IRIG systems from
Meinberg to expand them to a NTP Stratum 1 server.
The system allows various management and con-
figuration methods which can be activated/deacti-
vated individually for security reasons: Web inter-
face (HTTP/HTTPS), text-based setup program (TEL-
NET/SSH) and SNMP. Firmware updates can be eas-
ily carried out via the Web interface.
Technical specifications LAN-CPU
CPU Module Type:
C05F1
Processor:
Geode
TM
LX800 with 500 MHz
Main Memory:
256 MB
Cache Memory:
16 KB 2nd Level Cache
Flash Disk:
1 GB
Signal:
100BASE-T
Data transmission
rate:
10/100 Mbit/s
Connection type:
8P8C (RJ45)
Cable:
Copper twisted pair,
e.g. CAT 5.0
Duplex Modes:
Half/Full/Autonegotiaton
0
To connect a serial terminal (according to the device
model), use the RJ45 connector of the LAN-CPU. Via
the serial terminal connection it is possible to con-
figure parameters with a command line interface. You
have to use a CAB-CONSOLE-RJ45 cable to establish
a connection to your PC or Laptop computer. You can
use e.g. the standard Hyperterminal program shipped
with your Windows operating system. Configure your
terminal program with 38400 Baud, 8 Databits, no
parity and 1 Stopbit. The terminal emulation have to
set to VT100. After connecting to the timeserver there
will be displayed the login message (press RETURN
for first connection:
Default User:
root
; Password:
timeserver
CONSOLE
38400 / 8N1
DCD_IN
RXD_IN
TXD_OUT
GND
3
4 + 5
6
7
LANTIME CPU Expansion Shelf
Date: 2nd July 2020
171
