Mobatime DTS 4138.timeserver, Mounting And Instruction Manual, Page: 30 / 104

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6.5.6 NTP slave clocks / time zone server
NTP slave clock line for operating slave clocks on the LAN (Ethernet). With this clock
line, a world time function can be realized.
1. Mode of clock line: 0 = off, 1 = Send NTP multicast, 2 = Send NTP multicast and
time zone table, 3 = Send time zone table, 4 = Time zones on request, 5 (only for
maintenance) = Send an empty time zone table and return to previous mode.
2. Multicast adress for NTP and time zone server:
239.192.54.x
Group address: x = 1-15 for MOBATIME devices, e.g. NCI, SEN 40.
3. Multicast port for Time zone server (enter an arbitrary value, empty is not allowed!
Value e.g.: 65534). The port is also needed for requesting time zone entries
(mode 4).
4. Poll-interval for NTP Multicast in 2^
poll-values
in seconds (range: 1 – 16).
E.g. poll-value = 2  interval: 2 2 = 4 sec., poll-value = 5  interval: 2 5 = 32 sec.
For redundant Multicast time servers see remark next page.
5. Packet time to Live (TTL) for NTP- and time-zone-Multicast-packets in hops.
(Number of Routers in a network to transfer the packets through; for simple network
without routing, enter value "1", for 1 Router enter "2").
6. Repeat time to send time zone table: 10 – 86400 sec.
7. Delay time between the sending of the individual time zone entries (one entry per
Multicast packet) of the table: 1 – 60 sec.
8. Configuration of individual time zone entries. Displays menu “TIME ZONE TABLE“.
Notice:
Changes of multicast address, poll interval and TLL lead to a
restart
of
the NTP server.
Notice:
For the operation of a
multicast
communication (NTP and Time Zone
Server)
the configuration of a gateway is required
(see chapter “6.5.20
Network”). The gateway can be set manually or by using DHCP.
If there’s no gateway available, it’s possiible to set the own IP as gateway.