Ntp Timeserver - Symmetricom TimeSource 3600 User Manual

Chapter 1 Overview of the TimeSource 3600
Functional Description

NTP TimeServer

The TimeServer is a Simple Network Time Protocol (SNTP) device. The SNTP
TimeServer function is provided via the TimeSource Ethernet interface and
associated IP address. User software requests UTC time of day via NTP protocol.
The TimeSource SNTP server responds with current UTC time. The TimeServer is
compatible with the SNTP RFC-1769 format.
To enable the SNTP feature, a password must be entered using the ED-EQPT TL1
command. If a user makes a fourth attempt of an incorrect password entry, the
TimeServer will lock out the user for 1 hour.
Network Time Protocol Password Activation
Use of the Network Time Protocol (NTP) feature requires activation with a
password. Activation is accomplished through receipt of a Network Time Protocol
Activation Certificate from Symmetricom. This certificate contains the unit purchase
order number, unit model number, unit activation date, unit serial number, and unit
activation key. The unit activation key is the password that enables the NTP feature.
To activate the NTP feature, enter the TL1 command printed on the activation
certificate. Once activated, this feature will be permanently enabled. To order the
NTP feature, contact the local Symmetricom sales representative.
BesTime Ensemble Timing Generator
Clock signals from the GPS antenna (via the IF interface), local oscillator, and
optional E1 span lines are used as sources by the BesTime algorithms in the
BesTime Ensemble Timing Generator. The signals are analyzed for MDEV, TDEV,
and other phase and frequency characteristics.
The BesTime Ensemble Timing Generator uses mathematical models to analyze
each clock. The ensemble algorithms use the comparisons and analyses to
generate a highly stable timing signal, which uses the best qualities of all inputs.
E1 or Analog Outputs
The BesTime Ensemble Timing Generator provides the timing for the E1 or analog
(2.048 MHz) timing signal available at the E1 OUT A and B connectors. E1 is
provided in a framed, all-ones format, which can be set to CAS, CAS4, CCS, or
CCS4 framing. 2.048 MHz is provided in accordance with G.703/10.
097-72060-01 Revision J – June, 2007 TimeSource 3600 User's Guide 31