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Other Networking-Related DEFINITY Screens
A Screens Reference
Synchronization Plan
This screen assigns primary and secondary external synchronization sources. This provides synchronization
between the switch and digital facilities that the switch is connected to. When the switch is connected to digital
facilities, the switch (both Processor Cabinets and Expansion Cabinets) must be synchronized to the incoming
data rate of 8,000 frames-per-second. This timing information reference may be derived from DS1 facilities or
from a Stratum 3 external clock. Loss of the reference signal, excessive phase changes, and variation in timing
frequency can cause loss of data or dropped data connections. When no external digital facilities, including
Stratum 3 external clocks, are present or when a switch is the "master" node of a network providing timing to the
rest of the network, the timing can come from an oscillator on the switch’s tone/clock circuit pack.
The Synchronization Plan may not be required for some digital connections. The switch’s internal clock may
suffice.
Page 1 of the screen
Page 1 of X
SYNCHRONIZATION PLAN
SYNCHRONIZATION SOURCE (circuit pack location)
Stratum: _
Port Network: _
Primary: ___ Secondary: ___
Location Name Slip Type Location Name Slip Type
01C17 ______________ D UDS1-BD _____ _______________ _ ___
01C18 ______________ Y TBRI-BD _____ _______________ _ ___
_____ _______________ _ _____ _______________ _ ___
_____ _______________ _ _____ _______________ _ ___
_____ _______________ _ _____ _______________ _ ___
_____ _______________ _ _____ _______________ _ ___
_____ _______________ _ _____ _______________ _ ___
_____ _______________ _ _____ _______________ _ ___
NOTE: TN722B & TN464B DS1 sources result in stratum 4, type II synchronization
Stratum
Enter the stratum level to be used for synchronization.
Valid entries
Usage
3, 4 Stratum 3 capability is only possible when
using a TN780 Tone Clock circuit pack.
Port Network Only displays when the Stratum field is 3.
Valid entries
Display-only field.
Usage
304
Administration for Network Connectivity
CID: 77730 555-233-504 — Issue 1 — April 2000