Simple Network Time Protocol - Symmetricom TimeSource 3600 User Manual

Severity
State
Style
Label
Type
Label
Type
Function

Simple Network Time Protocol

Protocol Type
SNTP Accuracy
SNTP Alarm Indications
Password Activated
097-72060-01 Revision J – June, 2007
Connector Panel Contacts (Continued)
Critical
Major
Minor
Normally open and normally closed
Audible and visible
Front Panel Lamps
Alarms (CRIT, MAJ, MIN, ACO) Status
(GPS, SYS)
Light emitting diode
Front Panel Control
ACO
Push-button switch
Alarm cutoff (deactivates audible office
alarms)
SNTP (Simple Network Time Protocol)
compliant with RFC-1769 for unicast
applications
SNTP timestamp derived from UTC time
via integrated GPS receiver within –300
microseconds
1. SNTP packet will indicate Stratum 2 in
NTP packet header if GPS is out of lock.
2. The "ref id" field changes from GPS at
Stratum 1 to the IP address at Stratum 2 to
signify that the reference is the
TimeSource clock itself.
3. SNTP packet will indicate "clock not
synchronized" in LI field as a "3" value
after user defined alarm integration time.
Contact factory
Chapter 6 Specifications
Simple Network Time Protocol
TimeSource 3600 User's Guide 213