user manual

3 Using Cisco Transport Controller 78-11719-02 July 2001
Cisco ONS 15327 User Documentation3-28
CTC uses the latitude and longitude to place node icons on the network-view map. To
convert longitudes and latitudes given in decimal degrees to degrees, minutes, and
seconds, see the “Convert Coordinates to Degrees, Minutes, and Seconds” section on
page 3-28.
• Use SNTP Server—when checked, CTC uses a Simple Network Time Protocol
(SNTP) server to set the date and time of the node. Using an SNTP server ensures that
all ONS 15327 network nodes use the same date and time reference. The server
synchronizes the node’s time during power outages or software upgrades. If you check
Use SNTP Server, type the server’s IP address in the next field. If you do not use an
SNTP server, complete the Date, Time, and Time Zone fields. The ONS 15327 will use
these fields for alarm dates and times. You can still select a time zone if you use an
SNTP server.
• Date—Type the current date.
• Time—Type the current time.
• Time Zone—Select the time zone.
Step 4 Click Apply.
CTC uses the longitude and latitude you enter on the General subtab to place node icons on the
network-view map. You can obtain the longitude and latitude for cities and Zip Codes from the U.S.
Census Bureau U.S. Gazetteer website (www.census.gov/cgi-bin/gazetteer). Coordinates are
generally provided in decimal degrees. CTC requires that you enter coordinates in degrees, minutes,
and seconds. Use the following procedure to convert coordinates.
Procedure: Convert Coordinates to Degrees, Minutes, and Seconds
Step 1 Find the location’s longitude and latitude. For example, Petaluma, California is
38.250739 N, 122.615536 W.
Step 2 Use the appropriate directional letter plus the first two digits of latitude and first three
digits of longitude with no conversion. For Petaluma, this is N38 (latitude) and W122
(longitude).
Step 3 Using the unconverted longitude and latitude, multiply the number after the decimal by
60 to convert it to minutes. For example, .250739 x 60 is 15.0443, and .615536 x 60 is
36.93216. Use the whole numbers for the minutes (in the example, 15 and 36).
Step 4 Multiply the number after the decimal from Step 3 by 60 to convert it to seconds. In the
example, .0443 x 60 is 2.6580, and .93216 x 60 is 55.9296. Use the whole numbers of the
total (in the example, 02 and 55) for the seconds. If the whole number for either minutes
or seconds is less than ten, add a zero to the left of the number, for example, 2 is entered
as 02.
Step 5 Use zeros for fractional seconds, because the values are not significant for node
positioning on the CTC network-view map.
Step 6 Convert the latitude, originally given in decimal degrees, to the Nddmmssfff format,
where d=degrees, m=minutes, s=seconds, and f=fractional seconds. In this example,
38.257039 N = N381502000.