Symmetricom TimeCreator 1000 User Manual

24 TimeCreator 1000 User’s Guide 097-93100-01 Revision C – February, 2010
Chapter 1 Overview of the TimeCreator 1000
Overview
Overview
The TimeCreator 1000, shown in Figure 1-2, is a DOCSIS Timing Interface (DTI)
Server that delivers accurate timestamp and frequency synchronization, and with
GPS it can also provide Time of Day (TOD) to DTI client elements in a Modular
Cable Modem Termination System (M-CMTS) architecture. M-CMTS elements
shown in Figure 1-1 (Edge QAMs, Upstream Receivers, M-CMTS Core, etc.) use
DTI to synchronize the DOCSIS Timestamp and Symbol Clock used in the DOCSIS
communications between modems and the headend/hub. The TimeCreator 1000
functions as either a root server or subtending server. The root server is at the top of
a server hierarchy and is the source of traceable time and frequency for all
subtending DTI servers and clients in a building. The subtending server receives its
time and frequency reference through a direct connection to a root server’s DTI link
connector; a subtending server cannot be referenced to another subtending server.
Figure 1-1. DTI Server Hierarchy and M-CMTS Elements

Symmetricom TimeCreator 1000 Specifications

General

Brand	Symmetricom
Model	TimeCreator 1000
Category	Server
Language	English