Nortel Networks OPTera Metro 3500 - Manual (Page 207)

Operation, administration, and maintenance (OAM) features 2-169
Planning and Ordering Guide—Part 1 of 2 NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004
Site Manager Test Access Sessions Management application will support the
following functionality:
• to add a test access session
• to edit a test access session
• to delete a test access session or multiple test access sessions
• to retrieve test access sessions
Note: For backward compatibility, Test Access Sessions Management Site
Manager Release 6 will also support OPTera Metro 3500 Release 11.
For more information, refer to the Site Manager Planning and Installation
Guide.
Time of day synchronization
The time of day feature maintains synchronized real-time between OPTera
Metro 3000 network elements. Network time can be provisioned such that it
automatically adjusts for time zone offsets and daylight savings periods from
the reference time.
The network processor can be provisioned to obtain its timing reference from
a server that supports NTP 3.0 protocol on TCP/IP. This server can be another
network processor (a network processor can operate in a client-server mode).
The network processor can provide the synchronized timing source for the
shelf processors within its span of control. Communication between the
network processor and shelf processor occurs over the OSI network. See
Figure 2-62 .
Note 1: User datagram protocol (UDP) messages generated by NTP server
processes are delivered to UDP port 123.
Note 2: When all of the provisioned NTP servers are not available, the
network processor continues to service NTP requests by using its internal
clock to provide synchronized timing to SPs under its span of control.
Note 3: The shelf processor is able to switch to a secondary network
processor in the event that the primary network processor becomes
unavailable. This provides a redundant path in the case where multiple
network processors are used to monitor the same span of control.
Note 4: In the case where time of day synchronization status is on, and a
version 3.0 NTP server is used, the date on the network processor wraps
around to November 25th, 1900 after the network processor clock reaches
a date of December 31st, 2036. The date, December 31st, 2036, can be
manually set on the network processor.