TCG 01 User Manual
9
th
Edition: February 2007
Page 37 of 49
Login using a “Telnet” connection
This method has the advantage of not requiring the operator to be present at the
installed location. However the existing IP address of the NTS must be known before a
Telnet connection can be made. Both methods access the same options and menus. A
complete description of the NTS “Set-Up Mode” configuration menus and options starts
on p36.
D.3
Using Telnet to access Set-Up Mode
Provided that the NTS IP address is already configured and known, then the time server
can be configured using a Telnet Session to port 9999 on the known NTS IP address.
If the NTS IP address is
not
configured, an address must be temporarily assigned before
network access can be gained. A temporary IP address can be assigned in one of two
ways:
Assigning an IP address using DHCP addressing:
Networks that include a DHCP server offer automatic address allocation via D
Dynamic
Host C
Configuration P
Protocol. (DHCP). The time server will automatically operate within a
DHCP environment to fetch a dynamic address if it does not already have a fixed
address configured. Each time server has a unique system name that will show up on the
DHCP Server’s active lease list within a few seconds of the DHCP Server granting an
address to the NTS. Examination of the list will reveal the allocated address. The naming
convention used by the time server is a “C” followed by the last six characters of the time
server’s permanent MAC address. For example: If the TCG 01 unit has a MAC Address of
00-20-4A-72-08-B7, then the DHCP name of the NTS is: C7208B7.
Each TCG 01 equipped with a time server has a label on its base that shows the
permanent MAC address of the unit.
Assigning an IP address using ARP addressing:
The ARP method is available under UNIX and Windows and can be used in systems
where no DHCP server is present. The TCG 01 NTS will set its address from the first
directed TCP/IP packet it receives.
On a Unix host, create an entry in the host’s ARP table using the intended IP address and
the hardware MAC address of the NTS (found on the label on the base of TCG 01). The
UNIX command (for example addresses IP: 192.168.1.56 and MAC: 00-20-4A-72-08-B7)
is:
arp –s 192.168.1.56
00:20:4A:72:08:B7
