Modular NTP Solutions - TimeSource 35000 pages

TimeSource 3500
INTRODUCTION
Symmetricom’s TimeSource® 3500 is a
stand-alone Stratum 1 Primary Reference
Source (PRS) which works in GPS hostile
environments. TimeSource 3500 meets
GR 2830 network PRS performance requirements
by using a GPS antenna mounted
inside a window or on an outside wall. Timing
outputs with Stratum 1 performance are
achieved using advanced BesTime® technology,
single-satellite locking GPS receiver
subsystem, and Rubidium local oscillator.
BesTime is a flexible clock engine which
provides robust performance in compromised
GPS installations. BesTime continues to
predict GPS timing information during the
loss of GPS signals thereby guaranteeing
Stratum 1 performance with as few as one
satellite in view for as little as 10 hours per
day. PRS quality holdover is extended to 72
hours (0-50°C) for long term GPS outages.
Typical holdover performance is three weeks
at PRC quality (at 25°C). TimeSource 3500
can be installed in just about any window or
outside wall with a view to the sky, making
it the inexpensive, yet high performance,
alternative to cesium.
CONFIGURATION OPTIONS
TimeSource 3500 comes standard with two
T1 outputs. Expansion configurations includes
eight additional T1 outputs, eight T1/composite
clock outputs or eight T1/E1/2.048 MHz
outputs programmable on a per port basis.
KEY FEATURES
• Expandable Outputs Provides Single
Box Solutions for Small/Remote
Offices
• Increases Sync Coverage into Harsh
GPS Environments
• Window Antenna Lowers Installation
and Maintenance Costs
• Extended Holdover Reduces Nuisance
Alarms and Downtime
• Built-in Early Warning Performance
Monitoring Catches Problems Before
They Impact the Network
• Eight User-Configurable T1/Composite
Clock/E1/2.048 MHz Outputs
• NEBS level 3 and Telcordia Certified
• GPS Holdover Accuracy of 1x10-11 for
3 Weeks @25º C (Typical Performance)
• Sync Status Messaging
• Optional SNTP TimeServer
APPLICATIONS
The TimeSource 3500 system can be configured
as a PRS to front-end, an office BITS or
as a stand alone PRS with 10 outputs for
remote or small offices. In the stand alone
configuration, TimeSource 3500 provides up
to 10 T1 outputs in a compact, inexpensive
package. This configuration is ideal for timing
remote switch sites which may also have
SONET terminals or other network elements.
The TimeSource 3500 ensures PRS performance
is maintained through self-auditing the
inputs and measuring and reporting performance
against one another. Inputs can be
easily provisioned to be either included in
the timing ensemble output or be used for
monitoring only. TimeSource 3500 is fully
software upgradeable and provisionable
while in-service. Communication is via
RS-232 or Ethernet ports.
TimeSource 3500
GPS Through the Window/Wall/Rooftop Stratum 1 Timing System
TELECOM SOLUTIONS