Norstar-PLUS Modular ICS 4.0 Installer Guide - Wedophones.com ...

362 / Hardware
Norstar connected in a series of switches in a T1 or PRI network
Norstar or other switch
Norstar ICS
T1 or PRI
T1 service
service
provider
provider
Primary reference
Primary - DTI 1 obtains the timing
from the T1 service provider
Timing master - DTI 1 transmits the
system's timing to the other switch
Norstar connected by a T1 link to another switch in an analog
network
Norstar or other switch
Norstar ICS
Primary - DTI obtains
timing from other switch
Timing master - DTI transmits its
system's timing to the other switch
Modular ICS 4.0 Installer Guide P0881590 Issue 02